Electrical problem associated with all of my amps

Since I converted an upstairs room for my new system last November, everything was great. When the weather finally turned warmer, the A/C finally kicked on. However, as soon
as the A/C turns on the amps shuts down. At first I thought the Spectral DMA200 since it draws 800 watts continously was the reason, but it does the same with any of my amps.They all shut down; as soon as the A/C is turned off the amps start right up. None of the other equipment shuts down; because when you actually turn off the amp, the capacitors discharge and the music plays for a few seconds. So is it a voltage drop and I need something like a voltage stabilizer or do I need a new line run into the house. However, what is weird, the A/C and the stereo system are on different circuit breakers.
Any ideas would be greatly appreciated!!!