Speakerplans.com Homepage
Forum Home Forum Home > General > Amp Forum
  New Posts New Posts RSS Feed - Amp to run 4 x 18TLW3000 8/4 Ohms!!!
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Amp to run 4 x 18TLW3000 8/4 Ohms!!!

 Post Reply Post Reply Page  <123
Author
Message
mini-mad View Drop Down
Old Croc
Old Croc
Avatar

Joined: 13 July 2012
Location: london
Status: Offline
Points: 6903
Post Options Post Options   Thanks (0) Thanks(0)   Quote mini-mad Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 3:13pm
Originally posted by concept-10 concept-10 wrote:

Originally posted by U.Viktor U.Viktor wrote:

Originally posted by efinque efinque wrote:

Originally posted by mini-mad mini-mad wrote:

...surely that's a topology problem... not a PSU problem.

I read class AB amps have the best efficiency. However, a linear PSU will dissipate heat much more effectively than a SMPS, although switchmodes are generally working at 70-80% while a typical linear PSU is somewhere around 50-60%.. they weight a lot more, whereas with a switchmode you get switching noise, which, depending on the quality may or may not be audible.

EDIT : people have been succesfully using SMPS' in effect pedals etc due to their size, and I've seen some amps using them too.. maybe for small speakers they could be ok, but for heavy duty stuff like driving subs I wouldn't put my money on one.


No. Class AB amp shave almost the worst conversion efficiency ~ 50-60% maximum. Also plagued by the problem I have mentioned above^.

Class-D ( high frequency switching ) amps could have efficiency above 85% while very few reaches ~ 95% or more.

Linear (50/60HZ transformer) and poor switching power supplies without PFC are equally bad due their mains current distortion originated from 'peak rectification', which end sometimes as bad as they consumes 5X or 10X of the output power.
For example a 1000W SMPS(without PFC) or toroidal transformer would needs 4.3A average (6.2A peak) from the mains if the power factor would be correct (1.0) but unfortunately - due peak rectification - usually pulls out 50 or 100A peaks with very narrow conducting angle which is bad for the mains, generators and could create dangerous over Voltage spikes on the opposite phases. Learn and understand why good power factor are so important.

As there are thousands of inukes and old toroid amps being driven to with an inch of their lives every weekend why are we not seeing the problems you harp on about in every thread? Seriously if the world is going to end when using one then why has it not ended?

Never expected both ends of the spectrum when I made that comment LOLLOL

..you want to solve this problem then I suggest redesigning the power transistor!

Efinque. You many want to look that up again AB are awful when it comes to eff%

Vicktor. Stop scare mongering... distortion on the current entering the PSU being a problem? I suggest building your own power station.
And current being out of phase on ANY type of AC circuit it just one of those thing inherent in the system.  It won't trigger an apocalypse. Less caffeine mate and try to get out in the sun a bit more.

I love SP. You guys remind me I could be a lot (mentally) worse off...
  
If it sounds like a gorilla is trying to escape, turn it down.
Back to Top
Father-Francis View Drop Down
Old Croc
Old Croc
Avatar

Joined: 24 October 2007
Location: Kenya ,Denmark
Status: Offline
Points: 2760
Post Options Post Options   Thanks (0) Thanks(0)   Quote Father-Francis Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 3:28pm

I love SP. You guys remind me I could be a lot (mentally) worse off...

lol , Mini-Mad you are just alittle mad 
Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk
Back to Top
mini-mad View Drop Down
Old Croc
Old Croc
Avatar

Joined: 13 July 2012
Location: london
Status: Offline
Points: 6903
Post Options Post Options   Thanks (0) Thanks(0)   Quote mini-mad Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 3:59pm
Originally posted by Father-Francis Father-Francis wrote:


I love SP. You guys remind me I could be a lot (mentally) worse off...

lol , Mini-Mad you are just alittle mad 

Agreed... but my wife does her best to keep me inline. I'm not sure I'm cut out for the 21st century. To much nonsense everywhere forced on you on a daily basis.




So.......... back on topic.


...sorry
If it sounds like a gorilla is trying to escape, turn it down.
Back to Top
Battered View Drop Down
Registered User
Registered User


Joined: 19 January 2013
Location: S.W. LONDON
Status: Offline
Points: 461
Post Options Post Options   Thanks (1) Thanks(1)   Quote Battered Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 4:03pm
mini-mad kind of reminds me of the midget fortune teller that escaped from prison............

Small medium at large!!

Yeah, I don’t know what that means either, but it has been a **** of a few weeks and my brain is fried. And now I’m going to sleep to forget all about working with w***ers!!

LOL
Touching cloth at 200 mph
Back to Top
concept-10 View Drop Down
Young Croc
Young Croc


Joined: 17 May 2016
Status: Offline
Points: 1292
Post Options Post Options   Thanks (0) Thanks(0)   Quote concept-10 Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 4:25pm
I love SP. You guys remind me I could be a lot (mentally) worse off..

I know that feeling, if I get to the point of feeling a bit mental I spend half an hour on Facebook then realise life could be a lot worse.
Back to Top
toastyghost View Drop Down
The 10,000 Points Club
The 10,000 Points Club
Avatar

Joined: 09 January 2007
Location: Manchester
Status: Offline
Points: 10920
Post Options Post Options   Thanks (0) Thanks(0)   Quote toastyghost Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 5:00pm
Originally posted by Elliot Thompson Elliot Thompson wrote:

Originally posted by Father-Francis Father-Francis wrote:

Don't forget FFA10000


I always liked the sound of FFA. I would imagine the lack of popularity on Speakerplans is due to not having an on-board DSP.



Best Regards, 


Dave has world class DSP in his amps for a few years now

I'm all about headroom but if you get a huge amp, even on a driver with this high AES rating, and you don't limit it and filter it properly then be prepared to smoke some coils. For that reason, if you don't have a SERIOUS DSP and know how to use it, you'd be better off with K10, or K20 with DSP, or a Linea 44M20, or XTA APA4E8 plus paying someone to actually measure your driver in cabinet to calculate the long term RMS rating in volts and the heating threshold of the coil.

Edited by toastyghost - 18 December 2018 at 5:03pm
Back to Top
Dub Specialist Sound View Drop Down
Old Croc
Old Croc
Avatar

Joined: 15 November 2013
Location: Smethwick
Status: Offline
Points: 4873
Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Sound Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 5:54pm
ppl being running crowns, crest hh , c-audio ect ect for donkeys years flat out , even me on 8/12 hours sessions no problem

tha keep chuggling along nicely lol, yes do understand not as powerfull for nowadays drivers , but still

comments concept lol cracking up
Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
Back to Top
Father-Francis View Drop Down
Old Croc
Old Croc
Avatar

Joined: 24 October 2007
Location: Kenya ,Denmark
Status: Offline
Points: 2760
Post Options Post Options   Thanks (0) Thanks(0)   Quote Father-Francis Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 6:06pm
Originally posted by toastyghost toastyghost wrote:

Originally posted by Elliot Thompson Elliot Thompson wrote:

Originally posted by Father-Francis Father-Francis wrote:

Don't forget FFA10000


I always liked the sound of FFA. I would imagine the lack of popularity on Speakerplans is due to not having an on-board DSP.



Best Regards, 


Dave has world class DSP in his amps for a few years now

I'm all about headroom but if you get a huge amp, even on a driver with this high AES rating, and you don't limit it and filter it properly then be prepared to smoke some coils. For that reason, if you don't have a SERIOUS DSP and know how to use it, you'd be better off with K10, or K20 with DSP, or a Linea 44M20, or XTA APA4E8 plus paying someone to actually measure your driver in cabinet to calculate the long term RMS rating in volts and the heating threshold of the coil.
we got XTA's in the racks bro , not all powersoft amps have dsp , will be sending them for upgrading , got a good price for that . 
Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk
Back to Top
concept-10 View Drop Down
Young Croc
Young Croc


Joined: 17 May 2016
Status: Offline
Points: 1292
Post Options Post Options   Thanks (0) Thanks(0)   Quote concept-10 Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 6:20pm
[QUOTE=Dub Specialist Sound]ppl being running crowns, crest hh , c-audio ect ect for donkeys years flat out , even me on 8/12 hours sessions no problem

tha keep chuggling along nicely lol, yes do understand not as powerfull for nowadays drivers , but still

comments concept lol cracking up[/QUOTE 

Welcome dude Smile
Back to Top
Elliot Thompson View Drop Down
Old Croc
Old Croc
Avatar

Joined: 02 April 2004
Location: United States
Status: Offline
Points: 5172
Post Options Post Options   Thanks (1) Thanks(1)   Quote Elliot Thompson Quote  Post ReplyReply Direct Link To This Post Posted: 18 December 2018 at 6:29pm
Originally posted by toastyghost toastyghost wrote:

Originally posted by Elliot Thompson Elliot Thompson wrote:

Originally posted by Father-Francis Father-Francis wrote:

Don't forget FFA10000


I always liked the sound of FFA. I would imagine the lack of popularity on Speakerplans is due to not having an on-board DSP.



Best Regards, 


Dave has world class DSP in his amps for a few years now

I'm all about headroom but if you get a huge amp, even on a driver with this high AES rating, and you don't limit it and filter it properly then be prepared to smoke some coils. For that reason, if you don't have a SERIOUS DSP and know how to use it, you'd be better off with K10, or K20 with DSP, or a Linea 44M20, or XTA APA4E8 plus paying someone to actually measure your driver in cabinet to calculate the long term RMS rating in volts and the heating threshold of the coil.


From the pre-dsp days, many of us would train our ears to detect any issues taking place throughout the event. Although, Aphex Dominator was common in those times, many still gauged the levels based on common sense. I would imagine this is why I over power all my speakers.  

 

One of the biggest issues I’ve seen are those trying to cover a venue that requires 8 – 16 bins and expect to get the same output as 8 – 16 bins using 4 boxes. No amount DSP protection is going to prevent loudspeaker failure if the user is reckless.  

 

Sophisticated DSP protection is very helpful however, should never be looked upon as “My DSP is protecting everything so I can raise the fader higher.” Continuous average levels that offer a minimum Average to Peak Ratio can damage a loudspeaker with an unclipped signal just as fast as and amplifier being clipped to the point the clip light remains on like a light bulb.   

 

If someone is investing in four Eighteen Sound 18 TLW 3000 speakers, they are supposed to be familiar with every means of precautionary methods to prevent any loss in their investment.

 

Best Regards,  


Elliot Thompson
Back to Top
wilidapili View Drop Down
Registered User
Registered User


Joined: 13 August 2018
Location: Finland
Status: Offline
Points: 56
Post Options Post Options   Thanks (0) Thanks(0)   Quote wilidapili Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2019 at 5:42pm
We are now running 4x 18TLW3000 drivers on a Powersoft X4. One bridged channel for one double 18" cabinet. When we build two more subs, we will be running 8x 18TLW3000 on the X4, this time unbridged channels. Not optimal regarding headroom, though. We have our eyes on the X4L in the distant future, but we'll build some more cabs first. Maybe we should look into some other type of cabinets for efficiency, let's see. 
Back to Top
 Post Reply Post Reply Page  <123

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.06
Copyright ©2001-2023 Web Wiz Ltd.

This page was generated in 0.125 seconds.