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Amp Internals 2

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Oldmaelstrom View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Oldmaelstrom Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2010 at 4:08pm
Made in Ukraine 4 channel class D power amplifier, rated power 350W per channel into 4 ohms


Edited by Oldmaelstrom - 19 November 2010 at 4:13pm
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Wrighty View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wrighty Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2010 at 4:09pm
I think I know where the inspiration for that front panel design came from...
ALL YOUR BASS ARE BELONG TO US.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2010 at 6:49pm

Have a look at this amp and tell me your thoughts!







Edited by kedwardsleisure - 19 November 2010 at 7:43pm
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M4trix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote M4trix Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2010 at 10:18pm
Enjoy repairing that wreckage. Probably you will need to replace the PCB too unless you wanna make wire jumpers over the damaged copper tracks. That PCB looks really nasty. Ouch
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2010 at 10:34pm
I suspect after a good clean the damage won't look quite as bad.  I'm curious what the amp is.  I can't quite figure out the topology from those pics.  Also I know one output stage is upside down compared with the other but they still don't look the same.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DjLeco Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2010 at 11:05pm
ClassH 2 step!
 
Failed AB part from it, maybe oversized fuses, or fake 2SA 2SC output devices, the one wich burnt the 2 watts resistor are OPENED emitter, leaving the tension to chain burning other components , because the fuses did not blew when output devices fails...
 
Is an classical class H2 step OVERVOLT failing!
Very Bad!
 
I Bet is CHINA ONE!


Edited by DjLeco - 19 November 2010 at 11:08pm
I'm A Stupid SMART Romanian...
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andyamp View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote andyamp Quote  Post ReplyReply Direct Link To This Post Posted: 19 November 2010 at 11:12pm
yep not mde in the EU
a wise man changes his mind a fool does not.
http://www.matrixamplification.com/
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cilla.scope View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cilla.scope Quote  Post ReplyReply Direct Link To This Post Posted: 20 November 2010 at 12:47am
it looks to be a single channel of 5+5 devices on the left, plus 2 channels of 3+3 devices on the right,  mirror split half way up the PCB on the right if you look.

PSU has different raisl left and right side of the amp, I would guess the right side is 2 channels at a lower voltage than the left.  just noticed its 5 DC supplies wires to each channel ... so theres a bit of rail switching going on

Clearly purpose built as a 3CH, so most likely bass, mid, top  from some sort 3 way box ... .looks too old/crap to be off a powered line array box ..


Edited by cilla.scope - 20 November 2010 at 12:53am
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Well, she's not exactly my girlfriend yet ...
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Louder than loud View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Louder than loud Quote  Post ReplyReply Direct Link To This Post Posted: 20 November 2010 at 1:47am
i'll post a mackie swa amp up that went bang the other day lol ;)
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swannie View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote swannie Quote  Post ReplyReply Direct Link To This Post Posted: 20 November 2010 at 9:50am
Rauch P-120
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 20 November 2010 at 9:52am
Going back to the unnamed strange amp, I think Cilla has cracked it.  Well spotted there.
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Dilbert View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dilbert Quote  Post ReplyReply Direct Link To This Post Posted: 20 November 2010 at 12:56pm

deleted.... just looked closer is this 3 channel? left hand side extra fan cooled bass & 2 x mid / tops on right with less cooling? 



Edited by Dilbert - 20 November 2010 at 1:00pm
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