Hey everyone:
I picked up a couple of these amps used, but in very good condition.
Earlier, I had posted a thread requesting schematics for for the Crestron (ATI-made) CNAMPX-2X60 amps. I finally got the time to take a few pics of the internals, in case anyone is interested.
The first things that I noticed, compared with my ancient Mac 2105: The bass control is drastically better than my old McIntosh. Imaging is much better than the Mac too. The dynamics are much more lively. And the amps are very quiet. At full volume, I hear nothing through the speakers, even if I'm right beside them.
I picked up a couple of these amps used, but in very good condition.
Earlier, I had posted a thread requesting schematics for for the Crestron (ATI-made) CNAMPX-2X60 amps. I finally got the time to take a few pics of the internals, in case anyone is interested.
The first things that I noticed, compared with my ancient Mac 2105: The bass control is drastically better than my old McIntosh. Imaging is much better than the Mac too. The dynamics are much more lively. And the amps are very quiet. At full volume, I hear nothing through the speakers, even if I'm right beside them.
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I found one of these earlier this week at a local university's salvage sale. I've managed to do a minimal functional test on it using a 24VDC regulated wall-wart I found just the next day at a thrift shop. I'm happy with the amp, and I'm debating whether to try to bypass the "net" feature. It appears that in addition to the power relay on the inside of the front panel, the external 24V also powers the speaker protection board relays. Still thinking of how to work around that bit.
It seems that the best way is to put additional 3-4VA Standby transformer at 15-18Vac, put a small rectifier/cap and use it to power the protection PCB. You should also re-wire the power relay and the power switch so that the power is switched ON with the switch NOT the relay /this is easy you do not need to solder /. I've just got one CNAMPX and am about to do something like this. The power rails are little high - +/-46Vdc at no load, so this is not a 4 ohm amp. Does anyone saw tha output transistor's type? I would suspect they are Toshiba ones, but is this true and what type?
So I did make my one an independent working one. Strangely the protection PCB is reverse-acting so it does turn off speaker output if there is DCV on output and the protection pcb is powered, instead of turning on speaker outputs if there is no DCV on output and the protection pcb is powered, so you may not put additional small transformer and rectifier for 24Vdc, and the amp will still work, but the DC protection Will Not, so this is somehow risky for your speakers.