Parasound JC-1 - Standby during playback?

I would, simply as a troubleshooting action, place the JC-1s in Manual, just long enough to verify that they are/are not being erroneously triggered off by the preamp.

Of course during the testing, be sure to manually turn the amps on and off in the proper order as to avoid a possible big THUMP into your speakers.

Good Luck!

It's possible that when both amps are turned on the same time, the line voltage may drop due to high inrush current and cause the amps to go into standby. You can try turning on one amp at a time see if the problem goes away.

Shsohis, if you're turning on the JC 1s via the 12V trigger rather than manually, it's certainly possible a bit of DC could be coming from the Nagra preamp. The amps should be turned on last and turned off first, and when turning on allow time for the preamp to stabilize before turning on the amps. The turntable power supply should be turned on before or at about the same time as the preamp.

Please let us know how this works out for you.

I bought a pair of walwart 12V power supplies for he JC-1. I have set them power up in such a way that one lags the other by about 12 secs.

Meanwhile, I have started with the recommended powering-on sequence - so far so good. I need to monitor for a longer period of time. Pray this works. Will come back with an update - positive one I hope! Thanks all!

You can set the JC1s up so that they have a staggered turn on cycle. You do this by adjusting the turn on delay control at the back of the amp. Even if they get simultaneous 12 V turn on signals, they will power up after different delays. You should not need staggered 12 V turn on signals. I do this with my JC2 powering up both my JC1s. Same 12V siganl from the preamp, but I have the delay set differently on each JC1.

I am not sure what using the 12V turn on signal would have to do with DC coming from the pre-amp. They are completely different issues. DC on the audio input to the amp triggers a fault condition which puts the amp in a protection mode. Unless the implication is that the JC1s are powering up before the DC levels on the preamp settle to zero. In that case use the longer delay settings on the JC1.