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"The" Amplifier Internals thread ...

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Topic: "The" Amplifier Internals thread ...
Posted By: levyte357
Subject: "The" Amplifier Internals thread ...
Date Posted: 08 February 2009 at 2:48pm
Attempt to gather all the interesting amp pics into 1x thread.

"Authentic" Crest Ca18 internal




Tapco Juice 2500, QSC RMX 2450, Behringer EP2500

EV P3000




Proline 2700/3000




BST Liker 1320

Soundstandard PA1.3





Crest 9001

http://www.djellisdee.com/graphics/9001.gif


Matrix XP3000






-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".



Replies:
Posted By: SteveAATW
Date Posted: 08 February 2009 at 4:08pm
MC2 E25




Posted By: Xmax extreme
Date Posted: 08 February 2009 at 4:31pm
LOL. nice thread lev! Thumbs Up i can add my china amp collections too... sorry all i can afford WinkLOL

-------------
Maximum Excursion

Don't criticize your own competition, it looks like a publicity of your own commercial products.


Posted By: WhiteElephantSounds
Date Posted: 08 February 2009 at 4:41pm











Void Inf8 mk2




Posted By: levyte357
Date Posted: 08 February 2009 at 4:43pm
Originally posted by Xmax extreme Xmax extreme wrote:

LOL. nice thread lev! Thumbs Up i can add my china amp collections too... sorry all i can afford WinkLOL


No probs.

Was searching the net for the Darq amps, as they are just rebranded Soundstandard, but Crest Enforcers must have obliterated all of that. LOL

EDIT: Has anyone got pics of,

VZ5000,
8001,
Better pics of 9001
QSC 4050HD, RMX5050
PL 9.0pfc
PL 6.0 pfc
Powersoft K10



-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: Xmax extreme
Date Posted: 08 February 2009 at 5:43pm
Originally posted by levyte357 levyte357 wrote:

Originally posted by Xmax extreme Xmax extreme wrote:

LOL. nice thread lev! Thumbs Up i can add my china amp collections too... sorry all i can afford WinkLOL


No probs.

Was searching the net for the Darq amps, as they are just rebranded Soundstandard, but Crest Enforcers must have obliterated all of that. LOL


Ok here they are....Wink I will give some brief info on some models...



THE HEAVY WEIGHT DIVISION

This is the first edition of Soundstandard CA18, a 2 steps Class H...70volts  lower rail supply and 140 volts higher rail supply. 








Another CA18 look a like, but different manufacturer.... newer edition 3 steps Class H







CA20, newer edition, 3 steps Class H







MT 1500 = 1500 @ 8 ohms 
                    2300 @ 4 ohms 
4 steps Class H,  382,000 uF total filter storage 






DX 9.6.... Bridge type circuitry....  
1300 @ 8 ohms 
2000 @ 4 ohms 




 
  
  QUAD SERIES, 4 steps class H, On Semi Transistors
  1800 @ 8 ohms
  2700 @ 4 ohms 






Another heavyweight, oversized toroidal transformer...3 steps Class H with LCD.... displays  status of amp, working mode, temperature, clipping etc....







PRO series







Thats all for now....Smile


-------------------------------------------------------------------------------------------------------------------



Lev, just found an exact replica of your "Authentic CA18".... Wink




LIGHT WEIGHT DIVISION 

THE DIGITAL ERA ...Clap



LAB FP3400, Dual Switch Mode Power Supply 





THE FP 6400 wanna be... Regulated Switch Mode Power Supply



LAB FP 13000Clap  









-------------
Maximum Excursion

Don't criticize your own competition, it looks like a publicity of your own commercial products.


Posted By: deja-ibiza
Date Posted: 08 February 2009 at 6:25pm

 Lab Gruppen 10000Q - not the most exciting internals, but after spending 45 minutes looking for a T-8 screwdriver to open it, Angry I thought it's worth posting.

 It's a bit different - not old skool in any way, but my current weapon of choice.
 
1300w x 4 Channels into 8 Ohm
2100w x 4 Channels into 4 Ohm
2500w x 4 Channels into 2 Ohm

Bridged:
4200w x 2 Channels into 8 Ohm
5000w x 2 Channels into 4 Ohm

Essentially, it's 2 x FP6400 in one box.


 



And from underneath: (Not exciting I know, but it would have taken ages to remove the inut boards to expose the layers of construction.... so I didn't.)




Posted By: opus
Date Posted: 08 February 2009 at 6:58pm
Was just about to start a "Show us what's inside" thread but could not work out how to post my images.Embarrassed

Anyway, got that sorted now, so here's some old school!

Nice thread! Wink

Got a few of these old masters. Some with red caps some blue...don't know the difference...if any

HH VX1200




Posted By: simonp1100
Date Posted: 08 February 2009 at 8:24pm
A few internal pics of some C-Audio amplifiers i have repaired over the years, they include XR3801, SRX3801, RA3001, RA4001, SR707, Pulse 1100 & a TR850. Enjoy.
 
  http://img14.imageshack.us/my.php?image=xr3801pics1qz6.jpg">
 

http://img10.imageshack.us/my.php?image=tr850pic5gw6.jpg">
 
http://img6.imageshack.us/my.php?image=tr850pic4oy5.jpg">
 

http://img18.imageshack.us/my.php?image=tr850pic3ce6.jpg">
 

http://img7.imageshack.us/my.php?image=tr850pic2rv1.jpg">

http://img21.imageshack.us/my.php?image=ra4001top2ah7.jpg">
 

http://img22.imageshack.us/my.php?image=ra4001top1ok8.jpg">
 

http://img17.imageshack.us/my.php?image=ra4001rearvk8.jpg">
 

http://img14.imageshack.us/my.php?image=ra4001pcbig1.jpg">
 

http://img10.imageshack.us/my.php?image=ra3001pics2dz9.jpg">
 

http://img14.imageshack.us/my.php?image=pulse1100pic3ed9.jpg">
 

http://img17.imageshack.us/my.php?image=pulse1100pic4of2.jpg">
 

http://img22.imageshack.us/my.php?image=pulse1100pic5md5.jpg">
 

http://img21.imageshack.us/my.php?image=pulse1100pic6rl5.jpg">
 

http://img6.imageshack.us/my.php?image=ra3001pics1rf1.jpg">
 

http://img10.imageshack.us/my.php?image=pulse1100pic2ng4.jpg">
 

http://img6.imageshack.us/my.php?image=pulse1100pic1ts1.jpg">
 

http://img18.imageshack.us/my.php?image=image21tk9.jpg">
 

http://img7.imageshack.us/my.php?image=image18ww8.jpg">
 

http://img22.imageshack.us/my.php?image=image17yf9.jpg">
 

http://img10.imageshack.us/my.php?image=image12qa7.jpg">
 

http://img14.imageshack.us/my.php?image=image13fu8.jpg">
 

http://img17.imageshack.us/my.php?image=image14cr4.jpg">
 

http://img22.imageshack.us/my.php?image=image15tv2.jpg">
 

http://img21.imageshack.us/my.php?image=image16pm2.jpg">
 

http://img6.imageshack.us/my.php?image=image11iv6.jpg">
 

http://img18.imageshack.us/my.php?image=image10kr1.jpg">
 

http://img7.imageshack.us/my.php?image=image09cg3.jpg">
 

http://img22.imageshack.us/my.php?image=image08vv1.jpg">
 

http://img21.imageshack.us/my.php?image=image07ib1.jpg">
 

http://img17.imageshack.us/my.php?image=image05tt9.jpg">
 

http://img14.imageshack.us/my.php?image=image04by8.jpg">
 

http://img10.imageshack.us/my.php?image=image03tb3.jpg">
 

http://img6.imageshack.us/my.php?image=image02ke1.jpg">
 

http://img18.imageshack.us/my.php?image=image01wa5.jpg">


Posted By: Bespoke
Date Posted: 08 February 2009 at 8:39pm

OPUS HD 2500/2500  Power rateings....ummmmmm more like 1800w;)

http://www.slide.com/s/gl8rMsLn2T8vFtP1ridv1VW7vi4W97a6?referrer=hlnk">
http://www.slide.com/s/kO9dXTB0wz8TcEwSLpExewF6PSEyzkbk?referrer=hlnk">
http://www.slide.com/s/lAyt92CNwj87V8RGNwy8bxdTqqfWrKLV?referrer=hlnk">
http://www.slide.com/s/ybUVwSZ27j_RWRED36BvtUTZ9EfHD9Qk?referrer=hlnk">


-------------
Gone


Posted By: twinypaul
Date Posted: 08 February 2009 at 8:50pm
ppx1200
http://img7.imageshack.us/img7/149/holiday2004grancanaria0pc2.jpg">


-------------
paul


Posted By: twinypaul
Date Posted: 08 February 2009 at 8:53pm

monotech q3000

http://img145.imageshack.us/img145/8340/holiday2004grancanaria1ct8.jpg">



-------------
paul


Posted By: twinypaul
Date Posted: 08 February 2009 at 8:55pm

monotech other side

http://img161.imageshack.us/img161/9467/holiday2004grancanaria1xj2.jpg">



-------------
paul


Posted By: cravings
Date Posted: 08 February 2009 at 9:01pm
Mine are all smaller heh.. (well i have some xp3000s and xp1500s too...)

Neither of these C-Audio ones are actually working, but here's some pics of their insides anyway:

C-Audio 2600B (missing fan, should be on the right..)



C-Audio RA2000



a random little Trace Eliot PPA 300 that i have....



a random chinese amp.. LeeStar TS-1200



BKelec MXF900 / Audio Management DNA900




Posted By: kedwardsleisure
Date Posted: 08 February 2009 at 11:52pm
Crown MA5000VZ. Note the model number..there's no VZ5000!





-------------
Kevin

North Staffordshire



Posted By: cnics
Date Posted: 09 February 2009 at 12:29am
Thankyou Mr Edwards.  Something that really gets on my nerves that.




Digam 7000.....  without its front panel also.


-------------
Rob Beech - Technical Director - Cnics Audio


Posted By: Rog
Date Posted: 09 February 2009 at 2:52am

Cheers Jamie for putting up the Inf8 V2 pics, maybe you can edit your post and include this first time, never seen before pic.

 


Posted By: Xmax extreme
Date Posted: 09 February 2009 at 3:10am
Originally posted by Rog Mogale Rog Mogale wrote:

Cheers Jamie for putting up the Inf8 V2 pics, maybe you can edit your post and include this first time, never seen before pic.

 

Very nice master Rog ! Thumbs Up love the the push pull configuration of the air flow.... first time to see the infinite...Smile


-------------
Maximum Excursion

Don't criticize your own competition, it looks like a publicity of your own commercial products.


Posted By: opus
Date Posted: 09 February 2009 at 9:11am
Originally posted by cravings cravings wrote:

Mine are all smaller heh.. (well i have some xp3000s and xp1500s too...)

Neither of these C-Audio ones are actually working, but here's some pics of their insides anyway:



BKelec MXF900 / Audio Management DNA900


 
Got 4 of the OMP450 modules on which these are based...bomb proof, they never die!


Posted By: jbl_man
Date Posted: 09 February 2009 at 10:48am

Looking at all the photos posted so far,the Lab Gruppens are to me the most beautifully designed and built,the internals are a work of art.

OK here are a few old-school cheapo's.....
HH V800.
 
 
 
30 year old RSD Studiomaster 800c (rebuilt by me)


-------------
Be seeing you.


Posted By: Wrighty
Date Posted: 09 February 2009 at 2:29pm
Yamaha P5000S:















-------------
ALL YOUR BASS ARE BELONG TO US.


Posted By: Elliot Thompson
Date Posted: 09 February 2009 at 2:46pm
Here's an old Crest Professional Series 5000 designed in 1982.





QSC EX 4000





Crown MA 3600vz




I would put the MA 5000vz but, it was already posted.

Best Regards,

-------------
Elliot Thompson


Posted By: levyte357
Date Posted: 09 February 2009 at 2:51pm
Originally posted by Elliot Thompson Elliot Thompson wrote:


I would put the MA 5000vz but, it was already posted.
Best Regards,


@Elliot, do you have internal pics of the MX3000a and MPX1200/MPA1100? Just to see if there are any layout changes.


Cheers to all who have contirbuted so far. Clap




-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: tweeter box
Date Posted: 09 February 2009 at 2:52pm
wicked thread Leyte
 
Mods can we have this as a sticky please


-------------
PRECISION SOUND SYSTEM.

Feeding the peoples needs for Roots Music.

Strictly premium grade reggae and dub steppers from the early 70's to present day.


Posted By: Elliot Thompson
Date Posted: 09 February 2009 at 3:01pm

Originally posted by levyte357 levyte357 wrote:


Originally posted by Elliot Thompson Elliot Thompson wrote:

I would put the MA 5000vz but, it was already posted.

Best Regards,
@Elliot, do you have internal pics of the MX3000a and MPX1200/MPA1100? Just to see if there are any layout changes.Cheers to all who have contirbuted so far. Clap


The Schematic of the EX 4000 labels the MPX 1200 (JBL) on the same overlay sheet.

The MX 3000a Schematic is exactly the same as the EX 4000.

The EX 4000 came first followed by the JBL MPX 1200 then the MX 3000a. All three are exactly the same from a power persepective.

Best Regards,

-------------
Elliot Thompson


Posted By: kedwardsleisure
Date Posted: 09 February 2009 at 6:18pm
Chameleon 1U    
No I havent dismantled it yet, they all look like that.







-------------
Kevin

North Staffordshire



Posted By: csg
Date Posted: 09 February 2009 at 6:18pm
Lab gruppen 2000c built in 1993 - their first clast TD amp. was giving it its anual " deep clean" today, so took the oportunity to take some pics and staighten the front pannel out!





 


Posted By: breakdabeat pete
Date Posted: 09 February 2009 at 6:38pm
matrix ukp1300


matrix ukp2100



-------------
٩(̾●̮̮̃̾•̃̾)۶


Posted By: CHS
Date Posted: 09 February 2009 at 7:35pm
Inside the T.Amp TA2400 MKX. (my first post, hope it works)
  http://img148.imagevenue.com/img.php?image=11537_100_08111_122_220lo.JPG">
  http://img178.imagevenue.com/img.php?image=11557_100_08122_122_535lo.JPG">


Posted By: nickyburnell
Date Posted: 09 February 2009 at 8:16pm
Originally posted by CHS CHS wrote:

Inside the T.Amp TA2400 MKX. (my first post, hope it works)
  http://img148.imagevenue.com/img.php?image=11537_100_08111_122_220lo.JPG">
  http://img178.imagevenue.com/img.php?image=11557_100_08122_122_535lo.JPG">
 
Thats better than I thought? Tidy, big tranny..


-------------
It's everything, not everythink!


Posted By: levyte357
Date Posted: 09 February 2009 at 8:24pm
Originally posted by nickyburnell nickyburnell wrote:

 
Thats better than I thought? Tidy, big tranny..


Exactly what I thought, but only has 8x smoothing caps though.

Big boys have at least 12x. Yes Caps can have different values, but from upgrade point of view 12x upgrade caps, would be better than 8x.


-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: Chappie
Date Posted: 10 February 2009 at 3:58pm
QSC PLX3602 alongside the board from a PL236 (from which the PLX is derived)




-------------
Phill Chapman

http://www.soundbydesign.net" rel="nofollow - Sound By Design / http://www.deltasound.co.uk" rel="nofollow - Delta Sound


Posted By: technofreak
Date Posted: 11 February 2009 at 10:36am
Originally posted by levyte357 levyte357 wrote:

Originally posted by nickyburnell nickyburnell wrote:

 
Thats better than I thought? Tidy, big tranny..


Exactly what I thought, but only has 8x smoothing caps though.

Big boys have at least 12x. Yes Caps can have different values, but from upgrade point of view 12x upgrade caps, would be better than 8x.

What bothers me more is the lack of output transistors - only 8 per channel! Seems not too many for claimed 1200 W/ch @ 4 ohms... The smallest sibling, TA-450, which I happen to have, has 4 transistors per channel (and four 10000 uF caps), and is quoted as 200 W/ch @ 4 ohms. Unfortunately, I don't have a camera, so no pics, but it is very similar to TA-2400 internally - just smaller transformer and heatsinks, less caps and transistors.

As for TA-2400, a guy on a local forum said that they are prone to blow output transistors if pushed hard @ 4 ohms. Fortunately, these transistors are cheap. Also, this same guy said that he has done some modifications to the amp, increasing reliability.



-------------
http://www.youtube.com/watch?v=53Zq1I5_WAA - It's techno and it's freak


Posted By: Chappie
Date Posted: 11 February 2009 at 11:05am
Originally posted by technofreak technofreak wrote:


What bothers me more is the lack of output transistors - only 8 per channel! Seems not too many for claimed 1200 W/ch @ 4 ohms...

I would think there would be a similar compliment of them on the other side of the heatsinks.


-------------
Phill Chapman

http://www.soundbydesign.net" rel="nofollow - Sound By Design / http://www.deltasound.co.uk" rel="nofollow - Delta Sound


Posted By: tallmike
Date Posted: 11 February 2009 at 12:47pm
Inside an MC1250..
 


Posted By: Xmax extreme
Date Posted: 11 February 2009 at 5:06pm
Nice! fans and heatsink configuration is well designed for optimum air flow.Clap 

-------------
Maximum Excursion

Don't criticize your own competition, it looks like a publicity of your own commercial products.


Posted By: levyte357
Date Posted: 11 February 2009 at 5:11pm
Originally posted by Xmax extreme Xmax extreme wrote:

Nice! fans and heatsink configuration is well designed for optimum air flow.Clap 


I think the Proline has to earn best airflow reward.

2x Huge fans, and approx 15 trannys per channel.

The guy stays cool in 4ohm bridge ... Confused


-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: adambomb
Date Posted: 11 February 2009 at 5:16pm
yarp.. might not look as sexy internally as the C18 etc.. but it does stay cool all night.

-------------
http://www.freespeakerplans.com" rel="nofollow - www.freespeakerplans.com


Posted By: tallmike
Date Posted: 11 February 2009 at 5:16pm

I prefer the MC750's internals - four fans next to each other!



Posted By: Xmax extreme
Date Posted: 11 February 2009 at 5:35pm
Originally posted by levyte357 levyte357 wrote:

Originally posted by Xmax extreme Xmax extreme wrote:

Nice! fans and heatsink configuration is well designed for optimum air flow.Clap 


I think the Proline has to earn best airflow reward.

2x Huge fans, and approx 15 trannys per channel.

The guy stays cool in 4ohm bridge ... Confused

yeah,,,good one also lev, it has bigger fans, hmmmn i think it would still compensate cause it has a bigger area to pull the air out... whereas the MC1250 has smaller area,shorter length and directly on the heatsinks... Smile


-------------
Maximum Excursion

Don't criticize your own competition, it looks like a publicity of your own commercial products.


Posted By: levyte357
Date Posted: 11 February 2009 at 7:16pm
Nathon HI-1400 (Thanks to Rensaab). Clap



Patrons please note, this has been measured @ over 1kW into 8 ohms, and over 2kw @ 4ohms, @ 40hz.Wink



Xmaxextreme, what is the model/manufacturer of this amp?

QUAD SERIES, 4 steps class H, On Semi Transistors
  1800 @ 8 ohms
  2700 @ 4 ohms 



-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: mk2_ginger_biscuit69
Date Posted: 12 February 2009 at 12:00am
Cloud AX-6 - only a tiddler i know
 
EV P2000 (and 3000 if you imagine components in the spaces on the PCBs)
they have a nice 4x side2side fan arrangment up the middle, and of course plenty of power availableThumbs Up
 
Carlsbro powerline 500 (forgot the screwdriver, used a mallet)
 
Alto Macro 2400 (ie: QSC2450/tapcojuice/ep2500) - same kind of output, but always ran much cooler than the berrys
 
 
this is all i have hosted, many many more on my desktop which i will reassemble sometime (after a tequila shot went airbourne during my 21st).
 
got QSC 4050hd, 5050hd, lab 6400, lab 10k,  fohnn experience3 panel mount amp, qsc 850, EV P1250, carlsbro powerline 1000, berry 1500 in use as workshop ashtray after cremating itself, audiohead ah4000, jbl mpx1200, QSC PLX 3601, and a load more i cant remember the name of.
 
still no NEXO D12 internals!?! I wana see how minimal the componentry actually is, ive heard theres not much in there for your dollar.


-------------
''Remember that the object of a subwoofer is to enhance the output of your main speakers, not overpower it''

''Dubstep - an elongated electronic fart''


Posted By: GAZ.
Date Posted: 12 February 2009 at 12:25am
All the amplifiers here look quite clean and maintained inside. I think I have some pictures somewhere of insides of amps I have worked on that are so full of dust and dirt you cannot see the pcb's anymore!

-------------
100% Earth Moving Bass


Posted By: jonny4288
Date Posted: 12 February 2009 at 12:33am
would like to see insides some ffa & ecler amps


Posted By: levyte357
Date Posted: 12 February 2009 at 12:58am
Originally posted by mk2_ginger_biscuit69 mk2_ginger_biscuit69 wrote:

got QSC 4050hd, 5050hd,, audiohead ah4000, jbl mpx1200, QSC PLX 3601, and a load more i cant remember the name of


Cheers mate, 4050 & 5050hd would be nice.

But just for completion, could we please have a nice centerfold of the MPX. Yes is same as MX3000a, but for old time sake.LOL


-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: Xmax extreme
Date Posted: 12 February 2009 at 8:19am
Originally posted by levyte357 levyte357 wrote:

Nathon HI-1400 (Thanks to Rensaab). Clap



Patrons please note, this has been measured @ over 1kW into 8 ohms, and over 2kw @ 4ohms, @ 40hz.Wink



Xmaxextreme, what is the model/manufacturer of this amp?

QUAD SERIES, 4 steps class H, On Semi Transistors
  1800 @ 8 ohms
  2700 @ 4 ohms 



this is one powerful amp lev.... here are the rail voltages of this quad series.
± 50V   
±103V  
±157V  
±200V  


By the way, is the Naphon 1400 a 2 steps class H
I have a very similar amps like that before including all the internals... what are the rail voltages? 



-------------
Maximum Excursion

Don't criticize your own competition, it looks like a publicity of your own commercial products.


Posted By: Elliot Thompson
Date Posted: 12 February 2009 at 8:23am



±200V That is some good power indeed!

Do they have a website?


Edit: Nevermind. No Manual available


Best Regards,


-------------
Elliot Thompson


Posted By: roborg
Date Posted: 12 February 2009 at 12:00pm
It'd be really good if when posting pix people could also post more info about the No. of capacitors, output transistors & ratings/values/types..  Nevertheless, really nice pix!
  This info could be really useful for choosing amps still in production, especially class-d's etc.. So far i have yet to see a class-d amp that wouldn't go china crisis if it were capable of delivering its inferred ratings Wink

cheers,
  Rob


-------------
What I cannot create, I do not understand


Posted By: levyte357
Date Posted: 12 February 2009 at 12:06pm
Originally posted by roborg roborg wrote:

So far i have yet to see a class-d amp that wouldn't go china crisis if it were capable of delivering its inferred ratings Wink

cheers,
  Rob


In my books, QSC PL6.0pfc would be the only amp to replace my CA18. Wink


-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: RENSAAB
Date Posted: 13 February 2009 at 11:36am


QUAD SERIES, 4 steps class H, On Semi Transistors
  1800 @ 8 ohms
  2700 @ 4 ohms 
E]

this is one powerful amp lev.... here are the rail voltages of this quad series.
± 50V   
±103V  
±157V  
±200V  ShockedShocked

Damm!!!
 
With this sort of voltage swing, more efficient 16ohm drivers could soon be the way forward!
 
Ren


-------------
"The secret of the Scoop, what a wonderful piece of Science" - Tony ASS.

"when the amplifier and voice coil are in complete synchronicity there is magic" - A Well Respected Amp Guru


Posted By: levyte357
Date Posted: 13 February 2009 at 12:10pm
Originally posted by RENSAAB RENSAAB wrote:



QUAD SERIES, 4 steps class H, On Semi Transistors
  1800 @ 8 ohms
  2700 @ 4 ohms

this is one powerful amp lev.... here are the rail voltages of this quad series.
± 50V   
±103V  
±157V  
±200V  ShockedShocked

Damm!!!
 
With this sort of voltage swing, more efficient 16ohm drivers could soon be the way forward!
 
Ren


Yeah, problem is, it will definitely be chinese, which means not cheap any more, and by the time you've got one, the company might have gone out of business. Confused



-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: RENSAAB
Date Posted: 13 February 2009 at 12:34pm

Originally posted by levyte357 levyte357 wrote:

Originally posted by RENSAAB RENSAAB wrote:



QUAD SERIES, 4 steps class H, On Semi Transistors

  1800 @ 8 ohms
  2700 @ 4 ohms


 

this is one powerful amp lev.... here are the rail voltages of this quad series.
± 50V   
±103V  
±157V  
±200V  ShockedShocked

Damm!!!
 
With this sort of voltage swing, more efficient 16ohm drivers could soon be the way forward!
 
Ren



Yeah, problem is, it will definitely be chinese, which means not cheap any more, and by the time you've got one, the company might have gone out of business. Confused

 
I think you might be right LOL
 
Old school high current 2ohm (or even 1ohm) stable amps get my vote right now Wink
 
Ren


-------------
"The secret of the Scoop, what a wonderful piece of Science" - Tony ASS.

"when the amplifier and voice coil are in complete synchronicity there is magic" - A Well Respected Amp Guru


Posted By: Xmax extreme
Date Posted: 13 February 2009 at 12:36pm
Yeah, this is not an ordinary chinese amp, it's build with high quality components and  uses genuine ON SEMI output transistors...Smile not cheap anymore... 

-------------
Maximum Excursion

Don't criticize your own competition, it looks like a publicity of your own commercial products.


Posted By: RENSAAB
Date Posted: 13 February 2009 at 2:07pm
Originally posted by Xmax extreme Xmax extreme wrote:

Yeah, this is not an ordinary chinese amp, it's build with high quality components and  uses genuine ON SEMI output transistors...Smile not cheap anymore... 
 
Feel like the threads been hijacked LOL  
 
Interesting amp! I'd like to find out a bit more about it. Are specs available for this beast?


-------------
"The secret of the Scoop, what a wonderful piece of Science" - Tony ASS.

"when the amplifier and voice coil are in complete synchronicity there is magic" - A Well Respected Amp Guru


Posted By: mykey
Date Posted: 13 February 2009 at 2:36pm
my amps from the Man called Arthur G
this is the 5k 12.2
the undressing virgin stylee pics
get the tissues out
http://imageshack.us -
http://g.imageshack.us/img98/dscf0322oq3.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img13/dscf0322ww5.jpg/1/"> http://imageshack.us -
http://g.imageshack.us/img186/dscf0322pm1.jpg/1/">
http://imageshack.us - http://imageshack.us">
http://g.imageshack.us/img294/dscf0323zw7.jpg/1/">
http://g.imageshack.us/img134/dscf0323oe3.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img21/dscf0324gf6.jpg/1/"> http://imageshack.us -
http://g.imageshack.us/img8/dscf0324ip0.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img5/dscf0325rq3.jpg/1/">
can you smell that newness?
http://imageshack.us">
http://g.imageshack.us/img147/dscf0326zy5.jpg/1/">
http://imageshack.us">
http://g.imageshack.us/img5/dscf0327oy2.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img152/dscf0328rp0.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img230/dscf0329ok5.jpg/1/">
http://imageshack.us">
http://g.imageshack.us/img24/dscf0330rc9.jpg/1/">
loving the power leads
http://imageshack.us">
http://g.imageshack.us/img5/dscf0331lo2.jpg/1/">


-------------
......just all them hanging there like giant bananas.



Posted By: Elliot Thompson
Date Posted: 13 February 2009 at 2:57pm
The cabling looks rather thick.

Have you tested it out yet?








Best Regards,

-------------
Elliot Thompson


Posted By: mykey
Date Posted: 13 February 2009 at 3:00pm
yes already have a rack running for the last few months
a rack of .1's actually, will try the .2's tomorrow
just a tad over 5k i think, i'll check when i get in


-------------
......just all them hanging there like giant bananas.



Posted By: Father-Francis
Date Posted: 13 February 2009 at 4:40pm
Originally posted by mykey mykey wrote:

my amps from the Man called Arthur G
this is the 5k 12.2
the undressing virgin stylee pics
get the tissues out
http://imageshack.us -
http://g.imageshack.us/img98/dscf0322oq3.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img13/dscf0322ww5.jpg/1/"> http://imageshack.us -
http://g.imageshack.us/img186/dscf0322pm1.jpg/1/">
http://imageshack.us - http://imageshack.us">
http://g.imageshack.us/img294/dscf0323zw7.jpg/1/">
http://g.imageshack.us/img134/dscf0323oe3.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img21/dscf0324gf6.jpg/1/"> http://imageshack.us -
http://g.imageshack.us/img8/dscf0324ip0.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img5/dscf0325rq3.jpg/1/">
can you smell that newness?
http://imageshack.us">
http://g.imageshack.us/img147/dscf0326zy5.jpg/1/">
http://imageshack.us">
http://g.imageshack.us/img5/dscf0327oy2.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img152/dscf0328rp0.jpg/1/"> http://imageshack.us">
http://g.imageshack.us/img230/dscf0329ok5.jpg/1/">
http://imageshack.us">
http://g.imageshack.us/img24/dscf0330rc9.jpg/1/">
loving the power leads
http://imageshack.us">
http://g.imageshack.us/img5/dscf0331lo2.jpg/1/">


You lucky B´´´d Big show offCryCryCry


-------------
Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk


Posted By: Xmax extreme
Date Posted: 13 February 2009 at 4:42pm
Originally posted by RENSAAB RENSAAB wrote:

Originally posted by Xmax extreme Xmax extreme wrote:

Yeah, this is not an ordinary chinese amp, it's build with high quality components and  uses genuine ON SEMI output transistors...Smile not cheap anymore... 
 
Feel like the threads been hijacked LOL  
 
Interesting amp! I'd like to find out a bit more about it. Are specs available for this beast?

Ok here is the basic specs..

8Ω Stereo  Power = 1830W
4Ω Stereo  Power = 3000W
8Ω Bridge Power = 5450W
4Ω Bridge Power = 8500W
Frequency Response (+0/-0.3db 1W/8 ohm) 20Hz-20KHz(+0/-0.5dB)
THD+N      <0.025%
S/N: 103 db
Slew Rate   44V/μs
DAMPING Factor : 900:1
Input sensitivity 0.775V,1V,1.4V
Input impedance (bal/unbal.) 20KΩ/10KΩ
Fuse: 25A 
Input voltage : 220V 50/60Hz
Gross Weight 45 kg


-------------
Maximum Excursion

Don't criticize your own competition, it looks like a publicity of your own commercial products.


Posted By: Xmax extreme
Date Posted: 13 February 2009 at 4:44pm
I smell the newness mykeSmile , nice one you have thereClap

-------------
Maximum Excursion

Don't criticize your own competition, it looks like a publicity of your own commercial products.


Posted By: H...
Date Posted: 13 February 2009 at 4:47pm
Audio Center - OEM by Tony Lee - heard some very nice things about the QC on this factory. Certainly looks the part from what Mykeys lids off pic show


Posted By: roborg
Date Posted: 13 February 2009 at 5:22pm
Originally posted by mykey mykey wrote:

my amps from the Man called Arthur G
this is the 5k 12.2
the undressing virgin stylee pics
get the tissues out
http://imageshack.us -
http://g.imageshack.us/img5/dscf0331lo2.jpg/1/">
 
That amp looks to be the greatest human creation the planet earth has yet witnessed.  The manual should win all literary prizes, it even specifies the PSU capacitance, http://www.ac-pro.net/amplifierseries/da/DA_brochure_r100.pdf - http://www.ac-pro.net/amplifierseries/da/DA_brochure_r100.pdf
 
how much are they, how much to deliver one to the UK?
 
cheers,
  Rob.


-------------
What I cannot create, I do not understand


Posted By: levyte357
Date Posted: 13 February 2009 at 6:44pm
Originally posted by roborg roborg wrote:

Originally posted by mykey mykey wrote:

my amps from the Man called Arthur G
this is the 5k 12.2
 
That amp looks to be the greatest human creation the planet earth has yet witnessed.  The manual should win all literary prizes, it even specifies the PSU capacitance, http://www.ac-pro.net/amplifierseries/da/DA_brochure_r100.pdf - http://www.ac-pro.net/amplifierseries/da/DA_brochure_r100.pdf
 
how much are they, how much to deliver one to the UK?
 
cheers,
  Rob.


Yes, but 39.5 Kilos is a bit heavy for 1.8 kwpc @ 4 ohms though guy's.  Dead



-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: roborg
Date Posted: 13 February 2009 at 6:51pm
i just like the manual, it probably weighs about 50g Wink

-------------
What I cannot create, I do not understand


Posted By: Rog
Date Posted: 14 February 2009 at 1:15am
Uummmm,
 
Thought you would have spotted it Lev and jumped on it by now.
 
The big amp with 200v rails that can do 8500 watts into 4 ohms bridge yet only has a 25 amp fuse.
 
I must find out how you can draw 37 amps though a 25 amp fuse. This greater that 100% effeiciency routine has really got me stumped.
 


Posted By: Rog
Date Posted: 14 February 2009 at 1:24am
Also,
 
A 4 stage output is nice, but unless its built by a company that has been going for 300 years, has an unquestioned 100% reliablity track record and is the world leader in amp technology its going to go pop very quickly. Even the PL9 got pulled and that was 4 stage with 200v top rails. If QSC can't get it right, I would laugh my ass off if a company thats been going a few years with zero R&D can pull it off.
 
There are not many 4 stage amps around, if any, especially with 200v rails. And for a good reason.
 


Posted By: heinrich
Date Posted: 14 February 2009 at 1:37am
Originally posted by Xmax extreme Xmax extreme wrote:

Originally posted by RENSAAB RENSAAB wrote:

Originally posted by Xmax extreme Xmax extreme wrote:

Yeah, this is not an ordinary chinese amp, it's build with high quality components and  uses genuine ON SEMI output transistors...Smile not cheap anymore... 
 
Feel like the threads been hijacked LOL  
 
Interesting amp! I'd like to find out a bit more about it. Are specs available for this beast?

Ok here is the basic specs..

8Ω Stereo  Power = 1830W
4Ω Stereo  Power = 3000W
8Ω Bridge Power = 5450W
4Ω Bridge Power = 8500W
Frequency Response (+0/-0.3db 1W/8 ohm) 20Hz-20KHz(+0/-0.5dB)
THD+N      <0.025%
S/N: 103 db
Slew Rate   44V/μs
DAMPING Factor : 900:1
Input sensitivity 0.775V,1V,1.4V
Input impedance (bal/unbal.) 20KΩ/10KΩ
Fuse: 25A 
Input voltage : 220V 50/60Hz
Gross Weight 45 kg



nearly 2k on 8ohms..........

asa ta ug speaker ani bai ( where can we find a matching speaker for this mate) ?

very grabeeeeee.....Shocked

one hell of an amp .......


-------------
.....power is nothing without control....


Posted By: levyte357
Date Posted: 14 February 2009 at 2:28am
Originally posted by Rog Mogale Rog Mogale wrote:

Uummmm,
 
Thought you would have spotted it Lev and jumped on it by now.
 
The big amp with 200v rails that can do 8500 watts into 4 ohms bridge yet only has a 25 amp fuse.
 
I must find out how you can draw 37 amps though a 25 amp fuse. This greater that 100% effeiciency routine has really got me stumped.


They probably cost more than Crests and VZ5s by now Rog, thats why I could'nt be bothered pushing it  LOL


-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: technofreak
Date Posted: 14 February 2009 at 11:16am
Originally posted by Chappie Chappie wrote:

Originally posted by technofreak technofreak wrote:


What bothers me more is the lack of output transistors - only 8 per channel! Seems not too many for claimed 1200 W/ch @ 4 ohms...

I would think there would be a similar compliment of them on the other side of the heatsinks.

Yes, there is - in total 8 transistors for each channel. Anyways, here are 51 pics from a TA-2400 that was repaired by the local guy I mentioned before: http://picasaweb.google.com/MAX979/PAVoimendiTheTAmpTA2400# - http://picasaweb.google.com/MAX979/PAVoimendiTheTAmpTA2400# . The amp is taken apart to practically its elemental particlesWink The guy said that it could be much better amp if the original transistors are replaced with MJL21193/MJL21194, but due to owner's budget he didn't do it this time and just added another pair of transistors to each channel (PCB-s have place for 5 pairs actually), so 10 transistors per channel in total. He also said good words about this amp's protection circuits and build quality.



-------------
http://www.youtube.com/watch?v=53Zq1I5_WAA - It's techno and it's freak


Posted By: roborg
Date Posted: 14 February 2009 at 4:14pm
Originally posted by technofreak technofreak wrote:

Originally posted by Chappie Chappie wrote:

Originally posted by technofreak technofreak wrote:


What bothers me more is the lack of output transistors - only 8 per channel! Seems not too many for claimed 1200 W/ch @ 4 ohms...

I would think there would be a similar compliment of them on the other side of the heatsinks.

Yes, there is - in total 8 transistors for each channel. Anyways, here are 51 pics from a TA-2400 that was repaired by the local guy I mentioned before: http://picasaweb.google.com/MAX979/PAVoimendiTheTAmpTA2400# - http://picasaweb.google.com/MAX979/PAVoimendiTheTAmpTA2400# . The amp is taken apart to practically its elemental particlesWink The guy said that it could be much better amp if the original transistors are replaced with MJL21193/MJL21194, but due to owner's budget he didn't do it this time and just added another pair of transistors to each channel (PCB-s have place for 5 pairs actually), so 10 transistors per channel in total. He also said good words about this amp's protection circuits and build quality.

 
cool pix, the transformer gives the game away with 1464VA written on the side Cry


-------------
What I cannot create, I do not understand


Posted By: Silas ))))))
Date Posted: 21 February 2009 at 2:03pm
Ra 3000



And the peavey 8.5c






-------------
power in the blood


Posted By: Elliot Thompson
Date Posted: 21 February 2009 at 2:28pm
Thanks for the Peavey photo.

I always wanted to know the difference amongst the PV 8.5 and CS 800X from an inside view.




Best Regards,

-------------
Elliot Thompson


Posted By: Silas ))))))
Date Posted: 21 February 2009 at 3:02pm
Will take one of the peavey 1.3k (2000w) when i next open it up

-------------
power in the blood


Posted By: Silas ))))))
Date Posted: 22 February 2009 at 7:27pm
The Alto Macro 2400




-------------
power in the blood


Posted By: Elliot Thompson
Date Posted: 22 February 2009 at 9:10pm

Should anyone really be surprised that the Alto, Behringer, Tasco and, QSC 2400 watt models all resemble one another once you remove the top cover.

Best Regards,

-------------
Elliot Thompson


Posted By: james folkes
Date Posted: 22 February 2009 at 11:24pm
Originally posted by Silas )))))) Silas )))))) wrote:

Will take one of the peavey 1.3k (2000w) when i next open it up
the 1.3k looks just like the 8.5c only with correspondingly more/larger bits. i'm not sure why they print the 1000w x 2 on the front of that amp. whilst that is the 2 ohm rating, the manual says don't use it below 4 (650w)! whilst the lid's off so to speak, i think off-centre transformers are a very crap idea. the number of times one of those 1.3ks, a pv2000, cs1200x or any one of those poxy asymmetrical amps has caught me off-guard when lifting is no longer a point of amusement.

here's one many of you will know and love... mm electronics ap360! wahoo!

some of the nice things about this late 70s design (aside from the generously over-specced, totally independent power supplies) are the perfectly symmetrical weight distribution and the way you get at one channel by taking the top off and t'other by removing the bottom. i've got three now, they're still making me smile 30 years after they were made. comparable longevity might not be expected - or indeed designed for - in some modern tackle i fear...

http://imageshack.us">

http://imageshack.us">

http://imageshack.us">

another one that caught my eye when i had the lid off to prod the fan the other day, was an ashley fet200. an impulse ebay purchase on the premise that crossover-builders-making-amplifiers often turns out well, that has a ludicrous four output transistors per channel for it's meagrely 100 watts and the construction is super-pimp too. i'm totally buying the sound (it mates remarkably well with my high efficiency fane co-ax boxes, delivering some really stunning articulation at worryingly high volumes), although the utterly weird mains transformer (i think it has one primary and then one secondary per channel) humms like a bloody sub station, the curse of most of the amps i try and use for the living room pa... i'll take a picture if i have the lid off again.

for me, layout and heat transfer/airflow science wise, the opus hd amplifiers are pretty much the nicest and trickest i've seen: the exhaust port on a 2500 module will do you block of ice to beef bourguignon in 8 1/2 seconds...

james.





-------------
mardy hippy.


Posted By: MikeHunt79
Date Posted: 23 February 2009 at 12:34am
Those caps look really swollen on the RA3000, does it still work? Shocked

Awesome thread btw, I'll put some of of a Crest amp that it think is older than me when I get a chance! When did they start making amps?


-------------
I'm English, and as such I crave disappointment. I actively seek it out.


Posted By: Silas ))))))
Date Posted: 23 February 2009 at 8:09am
Originally posted by MikeHunt79 MikeHunt79 wrote:

Those caps look really swollen on the RA3000, does it still work? Shocked

Awesome thread btw, I'll put some of of a Crest amp that it think is older than me when I get a chance! When did they start making amps?


The RA still works other than one channel usually overheats after 2-3 hours, don't no too much about amp internals - anything i can doo about those swollen caps??


-------------
power in the blood


Posted By: SteveAATW
Date Posted: 23 February 2009 at 8:14am
Yup - replace them before they finally pop and leak electrolytic all over the inside of the amp


Posted By: csg
Date Posted: 23 February 2009 at 8:24am
easy check - it is probably just the plastic covering bubbling up - you can remove these to check on the state of the aluminium can underneath


Posted By: Elliot Thompson
Date Posted: 23 February 2009 at 1:04pm




Originally posted by james folkes james folkes wrote:




the 1.3k looks just like the 8.5c only with correspondingly more/larger bits. i'm not sure why they print the 1000w x 2 on the front of that amp. whilst that is the 2 ohm rating, the manual says don't use it below 4 (650w)!


The reason behind this is to meet UL Requirements. Under 2-ohm per channel, the amplifier will not meet UL's criteria for it gets too hot.

Peavey had to put 4 ohms minimum in stereo mode or you would not have one at your disposal.


Here is a Peavey CS 400 (late 80's) amplifier. I don't own any CS 400s so, I cannot go into great detail on the components inside this amplifier. It is 200 watts per channel @ 4 ohms if I remember correctly.



Best Regards,

-------------
Elliot Thompson


Posted By: MikeHunt79
Date Posted: 23 February 2009 at 1:52pm
Originally posted by Silas )))))) Silas )))))) wrote:

Originally posted by MikeHunt79 MikeHunt79 wrote:

Those caps look really swollen on the RA3000, does it still work? Shocked

Awesome thread btw, I'll put some of of a Crest amp that it think is older than me when I get a chance! When did they start making amps?


The RA still works other than one channel usually overheats after 2-3 hours, don't no too much about amp internals - anything i can doo about those swollen caps??

You really need to replace them all. Not a hard task soldering wise but you'll have to remove the PCB's.

I've found the main culprit with amps 10+ years old tends to be the caps going...

Old swollen up cap from an old numark amp (SA 3000):


I've now put some nice shiney new ones in and the amp works again.



-------------
I'm English, and as such I crave disappointment. I actively seek it out.


Posted By: Silas ))))))
Date Posted: 23 February 2009 at 7:07pm
Ah cheers for the info mike, will get on the case. Will have to see if its just the plastic or the caps, i reckon its most likely the caps.

Where do you source them?


-------------
power in the blood


Posted By: csg
Date Posted: 23 February 2009 at 8:07pm
rs, farnell, cpc etc


Posted By: csg
Date Posted: 23 February 2009 at 8:08pm

oh, and stick to the same voltage / capacitance  -increase the capacitance significantly and you may damage the bridge rectifier



Posted By: Silas ))))))
Date Posted: 23 February 2009 at 8:24pm
cheers for the info, just started a new thread, checked and its only the plastic casing not the caps themselves

http://www.speakerplans.com/forum/forum_posts.asp?TID=24318



-------------
power in the blood


Posted By: Silas ))))))
Date Posted: 23 February 2009 at 8:55pm
As promised, not that interesting but someone might find it useful - The peavey 1.3k (despite its rep, its never ever let me down yet.... and its been far from looked after)








-------------
power in the blood


Posted By: Elliot Thompson
Date Posted: 23 February 2009 at 9:50pm
Thanks!

I found these by the rubbish bin last year.






They are Soundcraftsmen PCR 800s and are in working order.


Best Regards,



-------------
Elliot Thompson


Posted By: Elliot Thompson
Date Posted: 23 February 2009 at 10:08pm
Here is a BGW 750. It offers the same guts as the Peavey CS 800.







Best Regards,

-------------
Elliot Thompson


Posted By: levyte357
Date Posted: 24 February 2009 at 4:20pm
Can someone/Andy please put up internal pic of the original Matrix STR3000, with its beautiful 'NAD' looking case.

The one put up earlier is the XP3000.

-------------
"Who am I? I'm the guy who does his job.. You must be the other guy".


Posted By: mk2_ginger_biscuit69
Date Posted: 24 February 2009 at 10:50pm
DB Opera active 400 cabinet, biamp module. the bass cone has a feedback circuit coming off it too PCB which is interesting, some kind of protection circuit im guessing. sorry i havnt a better picture, was repairing a comp driver and couldnt be bothered to unscrew it. nice sized heatsink to keep it cool however. very reliable
 


-------------
''Remember that the object of a subwoofer is to enhance the output of your main speakers, not overpower it''

''Dubstep - an elongated electronic fart''


Posted By: csg
Date Posted: 25 February 2009 at 6:55pm
HH electronic m900 - the install version of the v800, one of my favorite amps of all time


Posted By: kedwardsleisure
Date Posted: 26 February 2009 at 9:57pm
Warrior / W-Audio DA1300





-------------
Kevin

North Staffordshire



Posted By: opus
Date Posted: 27 February 2009 at 7:34am
Has anyone disected a KAM KRX2000 yet?


Posted By: Kaizen
Date Posted: 28 February 2009 at 6:10pm




QSC  MX 3000a





QSC  MX 2000a







BK MF1000 - *Proper* torroid on this and massive capacitors to go with it, not so sure about the cooling arrangement.





C-Mark MR2650


Since the transformer on the BK wasn't fastened down it makes it easy to do a direct comparison between this and the transformer in the C-Mark.



The C-Mark's is slightly wider, but the BK is deeper so I think overall there's not much in it. Bear in mind BK rate their amp at 1050 watts into 2R (it's a single channel amp) and C-Mark 2.4K into 8R bridge. Ok the BK costs a fair bit more per watt, but I think someone is exaggerating a little on their spec sheet Wink

The C-Mark is fine for mid tops (although the MX3000 sounds a fair bit 'cleaner' in a direct comparison) but you can't expect it to give a 2.4k bass bin the kick up the arse it would need on heavy basslines.





An embarrassingly mucky HH VX-900, not had chance to try this yet since I picked it up but looks nicely built and has a decent torroid for it's 900w rating.





Alesis RA300 - pretty well built, great for home audio because it's passively cooled.


Posted By: andyamp
Date Posted: 28 February 2009 at 7:03pm
Hi Kaizen
how big a toridal transformer is can be deceptive as the output power per KG can me as much 30% different.
so a transformer can deliver as much power as one that is 30% bigger if the smaller transformer is built from better material and of a better design.
the Top transformer looks like a western made transformer
and the bottom one looks chinese.
the top unit has much thicker wire on it,and the windings are very good(unlikely to be chinese)LOL
but the bottom one may be bifila.
My money will be on the top one i would guess it will put out 15% more power than the bottom one, but testing it would tell.
that is what i see in the pictureThumbs Up
and the alesis uses an Ecore transformer.
 toyCry




-------------
a wise man changes his mind a fool does not.
http://www.matrixamplification.com/ - http://www.matrixamplification.com/


Posted By: Kaizen
Date Posted: 28 February 2009 at 8:30pm
Yes admittedly my comparison was highly unscientific! The BK really does put the C-Mark to shame though, if we believe the label on the BK and say it's 1kw, C-Mark have put an 850w transformer in an amp specced for 2.4kw (assuming 15% less), o dear. Comparing the size of capacitors might also be a bit misleading, i'm sure i've read somewhere that the voltage they run at is just as important as their capacity?

I was a bit dissappointed when I first saw that transformer in the Alesis, not bad for a fiver off ebay though! Just needs a new gain pot.

In case anyone was also wondering what the benefit of a torroidal transformer is this http://www.plitron.com/advantages.asp - this link seems pretty good.


Posted By: andyamp
Date Posted: 28 February 2009 at 9:02pm
i know them.
the only thing that's not true is low mechanical hum.
i have used a lot of toridals and most that people make are junk.
so i do my ownLOL
some people that make toridals cannot resist using cheper materealsCry


-------------
a wise man changes his mind a fool does not.
http://www.matrixamplification.com/ - http://www.matrixamplification.com/


Posted By: Kaizen
Date Posted: 28 February 2009 at 9:50pm
Originally posted by andyamp andyamp wrote:


some people that make toridals cannot resist using cheper materealsCry



This is why accountants should never help design amplifiers! Is lower mechanical hum not true for all torroidals, or just if they're made more cheaply/poorer design?

I take it you'll be continuing the philosophy of using high quality materials with your switched mode PSUs.. Do you believe a PSU should be able to provide the (RMS) rated output of the amp continuously, as BK appear to, or is it unnoticable during capacitor draining basslines if it's only capable of a specific duty cycle?


Posted By: nickyburnell
Date Posted: 28 February 2009 at 10:36pm
Originally posted by opus opus wrote:

Has anyone disected a KAM KRX2000 yet?
 
Got one here. Will do tomorrow.


-------------
It's everything, not everythink!



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