Hi Okay I have a few N00B questions regarding power amps. I watch a lot of bluray and only a little bit of music. I want to know if I will gain anything/worth spending around £800ish on a multi channel power amp to add some oomph to my system. I'm using a Yamaha 3067/MA silver and a BK 400 sub. Firstly I just wanna say I'm happy with my current setup. It's been tuned with an SPL meter from day one. I like to watch movies with the volume around the -20dB mark in the daytime and around -35 at night. Is it bad for the AV amp or speakers if I had the volume around -10dB as I think that's where it sounds best?? I don't hear any distortion whatsoever neither has the amps protection circuit ever kicked in on me. I was thinking, What if one went into the speaker setup> gain menu and just boosted up the levels slightly? How is that any different to buying a power amp? Afterall Your going to get bigger sound?? I understand this may not be ideal for the amp interms of power consumption/heat etc but what about the speakers if they're being driven too hard but not to the threshold of distortion? If that's a no-no and I have to be looking at power amps, would the Marantz MM7055 be a good buy to boost my system? What I really wanted to know was, if I use my Yamaha amp as a processor does that mean I will lose that warm signature yamaha sound and have to adjust to the sound from the Marantz power amp?