Well, it sounds like it could be one of several issues. First, make sure that you have the Auto turn on/off system defeated by moving the 'Select' switch to the center position 'Manual' in the Auto Turn On section in the rear of the amp. If this fixes the problem great, you know there is an issue with the Auto on/off circuit, but you just fixed it by placing it in manual mode. You simply have to turn the amp on and off manually.
The other issue could be the protection circuits are kicking in. Your amp will shut down if it senses a high current draw in the output stage (usually from speakers which dip to below 1 ohm at some point). Protection circuits will also shut down the amp if too much heat is sensed (improper ventilation) or DC is sensed at the speaker terminals. You could have either speakers that are too difficult for these amps to drive (unlikely), the amps stuffed in a cabinet with inadequate ventilation, or DC leaking from somewhere (could even be from a preamp or CDP). Of course you also could have none of the above issues and just problems with the detection circuits in the Parasound (false positives).
I would look into my first paragraph first, as this is the easiest and cheapest possible fix. Good luck.
John
The other issue could be the protection circuits are kicking in. Your amp will shut down if it senses a high current draw in the output stage (usually from speakers which dip to below 1 ohm at some point). Protection circuits will also shut down the amp if too much heat is sensed (improper ventilation) or DC is sensed at the speaker terminals. You could have either speakers that are too difficult for these amps to drive (unlikely), the amps stuffed in a cabinet with inadequate ventilation, or DC leaking from somewhere (could even be from a preamp or CDP). Of course you also could have none of the above issues and just problems with the detection circuits in the Parasound (false positives).
I would look into my first paragraph first, as this is the easiest and cheapest possible fix. Good luck.
John