Great, Thanks for the info. I thought that would be correct but just wasn't sure.:TYou set up your gear so you can get the 75db level. If you can't get it with the power amp all the way up, then turn it down so you can. The volume level has to be controled by the preamp.
Its like with my Bash sub amps, the receiver's sub out is at -10db, with the Bash volume control only about 1/3. And at that, the sub is about 5~6db hotter than the other channels, which is how I want it.