Speakerplans.com Homepage
Forum Home Forum Home > General > Amp Forum
  New Posts New Posts RSS Feed - Amp Internals 2
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Amp Internals 2

 Post Reply Post Reply Page  <1 2829303132 260>
Author
Message
 Rating: Topic Rating: 1 Votes, Average 5.00  Topic Search Topic Search  Topic Options Topic Options
DjLeco View Drop Down
Young Croc
Young Croc


Joined: 21 April 2009
Location: Bucharest
Status: Offline
Points: 817
Post Options Post Options   Thanks (0) Thanks(0)   Quote DjLeco Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 6:10am
That scratched circuit is not an enigma...
Is clasically SG3525...
I'm A Stupid SMART Romanian...
Back to Top
infrasound View Drop Down
Old Croc
Old Croc


Joined: 13 May 2011
Location: Brizzle
Status: Offline
Points: 2276
Post Options Post Options   Thanks (0) Thanks(0)   Quote infrasound Quote  Post ReplyReply Direct Link To This Post Posted: 15 August 2011 at 10:23pm
Originally posted by Nitz V1505 Nitz V1505 wrote:

Still one of my favourite amps, all this light weight business on sub bass wont do. But my back tends to disagree with me. 

Quote A r c h i t e c t ’ s  &  E n g i n e e r ’ s   S p e c i f i c a t i o n s

The power amplifier shall consist of 2 channels and deliver a minimum of 3500 watts at 2 ohms, 5000 watts at 1 ohms; per channel, both channels driven, 20Hz-20kHz, <0.1% THD+N. In bridged mode, it shall deliver a minimum of 7000 watts at 4 ohms, and a minimum of 10,000 watts at 2 ohms, 20 Hz-20kHz, <0.1% THD+N.
Back to Top
andyamp View Drop Down
Old Croc
Old Croc


Joined: 21 July 2007
Location: United Kingdom
Status: Offline
Points: 2115
Post Options Post Options   Thanks (0) Thanks(0)   Quote andyamp Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 6:01pm
looks like the pulce circuit
a wise man changes his mind a fool does not.
http://www.matrixamplification.com/
Back to Top
lauret View Drop Down
New Member
New Member


Joined: 13 August 2011
Status: Offline
Points: 4
Post Options Post Options   Thanks (0) Thanks(0)   Quote lauret Quote  Post ReplyReply Direct Link To This Post Posted: 16 August 2011 at 5:29pm
I would like well try the amplifier CROWN.

It looks very solid.

Edited by lauret - 16 August 2011 at 5:30pm
Back to Top
andyamp View Drop Down
Old Croc
Old Croc


Joined: 21 July 2007
Location: United Kingdom
Status: Offline
Points: 2115
Post Options Post Options   Thanks (0) Thanks(0)   Quote andyamp Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 6:09pm
hope they do not.
top switch rule ok
a wise man changes his mind a fool does not.
http://www.matrixamplification.com/
Back to Top
kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
Location: Staffordshire
Status: Offline
Points: 4938
Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 16 August 2011 at 7:45pm
Solid is one word I would not use on this occasion, I'll put it down to the language barrier!
Kevin

North Staffordshire

Back to Top
ceharden View Drop Down
The 10,000 Points Club
The 10,000 Points Club
Avatar

Joined: 05 June 2005
Location: Southampton
Status: Offline
Points: 11776
Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 9:10pm
10 IGBT's? What crazy topology are they running?
Back to Top
kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
Location: Staffordshire
Status: Offline
Points: 4938
Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 16 August 2011 at 11:04pm
QSA NX5.1





DC Bus caps sail close to the wind with 20V headroom and no equalising resistors.




IGBT Drive inspired by an amp designed closer to home!
Tops of chips filed away.


Edited by kedwardsleisure - 16 August 2011 at 11:07pm
Kevin

North Staffordshire

Back to Top
kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
Location: Staffordshire
Status: Offline
Points: 4938
Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 5:58pm
Drives 10 IXYS igbts via the wee transformer.

Mains switch is on secondary side, SMPSU stays powered up 24/7

Uprated caps to Nichicon 200V and fitted NTC to stop my 13A socket switch welding in.



Edited by kedwardsleisure - 17 August 2011 at 6:01pm
Kevin

North Staffordshire

Back to Top
andyamp View Drop Down
Old Croc
Old Croc


Joined: 21 July 2007
Location: United Kingdom
Status: Offline
Points: 2115
Post Options Post Options   Thanks (0) Thanks(0)   Quote andyamp Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 6:48am
what 3525 never heard of it,and a curent buffer
a wise man changes his mind a fool does not.
http://www.matrixamplification.com/
Back to Top
kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
Location: Staffordshire
Status: Offline
Points: 4938
Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 16 August 2011 at 5:15pm
Crown MA10000i


Kevin

North Staffordshire

Back to Top
kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
Location: Staffordshire
Status: Offline
Points: 4938
Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2011 at 6:05pm
Yeah very similar, hope they got the IGBT driver transformer right!

Also uses VIPer smpsu for standby circuit fed off main DC bus.
Maybe copied off taiwanese blue ray player?


Kevin

North Staffordshire

Back to Top
 Post Reply Post Reply Page  <1 2829303132 260>

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 0.297 seconds.