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Old 4th April 2004, 01:20 PM   #1
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Default Crest VS 900 problems


I have a Crest VS 900 amplifier that has developed a rather nasty problem. It has a positive waveform clip and goes into protection upon signal being applied to either channel. It seems to have a DC offset problem also. If the signal is applied very very slowly I can get several volts out into the 8ohm load before it goes into protection. The positive waveform is totally clipped and the negative is fine. I cannot get a schematic for it so I am asking if someone has had experience with one of these. There seems to be a STK module in the circuit that I assume is part of the front end, but this is a guess.

Any thought here would be appreciated.

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Old 4th April 2004, 05:01 PM   #2
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Location: Munich

...might be an issue with the power supply.
Did you check the internal voltage rails?

Good luck
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Old 4th April 2004, 06:20 PM   #3
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Hi Markus

Just finished rechecking the power supply with no fault found. I suspect the STK 3152 module is bad.

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Old 30th January 2012, 10:05 PM   #4
SS64 is offline SS64  United States
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I know this a old old post, But I just picked up a 900 that only one channel seems to do this. Channel b seems to clip early and if more drive is applied the amp goes into protect. What is the problem?
It isn't fun unless it can kill you!
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Old 5th February 2012, 07:41 AM   #5
djk is offline djk
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Replace the STK 3152, most common problem with this amplifier.
Candidates for the Darwin Award should not read this author.
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