I'm thinking of auditioning a 2 channel amp to see how much of a difference there will be in Sound Quality. My question is when you connect the line-in on the amp to the pre-out on the receiver do you have to tell the receiver not to drive those channels anymore or does it automatically sense the amp connected and not send any power to those speaker connections? I looked through the manual 3 times and it doesnt say anything. Also when you are using an amp can you still control the volume adjustments of the speakers from the receivers menus or do you have to manually adjust from the amp itself? There are no menu options that refer to these preouts. Nothing like USE PREOUTS . So im assuming you just plug the Rca cable between the amp and the preout, hook your speakers to the amp and youre good to go. Also with an amp hooked up it doesnt bypass my bass management does it? I mean would having my speakers set to small still crossover at 80 just like using the receivers built in amps. As you can tell I dont have any experience using seperates so any help would be greatly appreciated?