Does it make a thump when you have the empeg turned off and on without unplugging it?

My empeg creates a thump when I start the enginge with it running. It's not the amp, it's the empeg. With the RCAs disconnected, restarting the car is a nice silent operation. With the RCAs connected, it's a painful way of conditioning me to turn the key backwards before turning it forwards.

If there's any sort of "capacitor network" to prevent the thump, I'll certainly try it out.

Matthew