Depends on who you ask There is allot of debate to whether or not this makes a noticeable difference. My belief is Yes it can SOMETIMES, but it depends on your equipment. I believe that if you have external amps and speakers that crave power, yes it will make a difference, because you can essentially create more headroom. I don't believe bi-amping using just an AVR does anything, an AVR is usually under powered anyway, so unless you are truly running a separate amp to each high and low terminal, you aren't really doing anything. The best thing you can do is give it a try, it is not hard to do and either way isn't a waste of time because you can answer the question yourself. This post will generate some good conversation though!!