Quote
Originally posted by Derrick:
Yep, the amp is overloading and is turning itself off.

You need one of these....
https://www.amazon.com/Niles-Audio-...p;ie=UTF8&qid=1315348217&sr=1-17

Wire your amp to the imput and home run to each volume control. You might need some new volume controls but I bet the wiring is commoned up somewhere with wire nuts or something and that is causing most of your problem. I know from experience.
Isn't that intended for low-impedance speakers? The OP is using 70V.