I have tried this set up in the basement.
Pre-amp is an Adcom - 5 channel - circa 1990
Commercial sound reinforcement amp is a Crown 802 w/500 watts per channel.
This system sounds OK but I suspect the output voltage on the Adcom pre-amp does not match up well with the input circuits in the Crown commercial amp.
Is this correct?
I think I may sell the Crowns and go with Adcom power amps....