My reason for bi amping wasnt for using an external cross over to clean up the signal, it was for gaining the additional power from the 2nd channel. The above poster is correct, I cant find real world specs on the Onkyo's 4 ohm rating, but there is definitely more power in 4ohm, and it does kick the amplifier down. The Onkyo has the ability to Bi Amp using the rear 7.1 channels and outputs the same signal as the mains. Therefore you would gain double the power. I realize these arent mono channels, but most flagship receivers do ouput very close to there rated channels on the bench, even with all channels drivern. I cant say for sure I'm getting around 200 watts from the fronts and rears in 4 ohm, but it would have to be greater then the 145 watts @8ohm. I do know that this Onkyo receiver crushes my Magnepan mmgs in the 4 ohm setting. I used a Sony receiver from a few years back, and it couldnt even come near the volume the Onkyo delivered. This setup is for home theater, so I want to make sure I can handle the 1.6's with this receiver, but I think I'll be OK. Specially if the Magnepan can be biamped and the Onkyo works as it states it does. Again, I do know for sure the receiver drops down to 4 ohms, even in bi amp mode. It has a bridging mode that delivers 220 watts in 8 ohms to both front channels, but you cant go under 8 ohms, so I wont use that setting on these speakers. Being that its home theater, I'll likely cross the 1.6's over between 60-80HZ
I'll do some diggin around for some bench tests on the Onkyo 906.
I'll do some diggin around for some bench tests on the Onkyo 906.