Well, when I play DVDs & Blu-rays my large, quality LF & RF speakers are driven by my Arcam integrated amp and the AVR300 drives the front and surround speakers. They two amps are connected from Pre -out on one to play-in on the other. So I'm only using 3 amps on my AVR. If I wanted I could plug in 2 more speakers to get 7.1 surround. Why did I make this change? Because I did not want 2 sets of speakers either side of the TV., one pair of large Hi End Avalons (for quality classical music listening) and the smaller Fl & Fr's (on stands) from my surround speaker set (both with speaker cables). I dont know what the connecting cable is called. Anyway, it works, cos when I press amp. on my remote both click on and I get the full surround sound from both DVD and Blu-ray. When I play CDs or listen to radio I switch off the AVR.