When I commented that biamping was not that simple I was mistakingly thinking in terms of sound quality improvement. Bi-amping in its simple way (removing those straps only and leave the internal crossover network alone) does deal with the issue of " having enough power.........", and that's what wmitty is asking about in the first place. To bi-amp with a 3806 he will be using all 7 channels, with 4 of them driving his 4 ohm Schonberg speakers to "moderate volumes" in his relatively large room. The 3806 could run pretty hot, depending on how he defines "moderate volumes". He may not need an amp, but it is better he gets one, or go for the more robust 4806. Also, it gets more difficult if those Schonbergs are not terminated to facilitate bi-amping.
As an aside, and in terms of sound quality, I still have more questions than answers about biamping. One of the articles I read on this topic has the following to say:
"Biamping:
There are some benefits if you are biamping with identical amps in the system. By doing so, you are now driving the speakers with double the power (3dB more headroom). This may help in bass response, dynamics, and overall fidelity. Another benefit is electrical isolation between highs and lows of the speaker system as they are independently connected to separate amplifiers. This has the potential to reduce crosstalk and mutual inductance, assuming the chokes in the crossovers are isolated and the speaker cables are well separated from each other. However, if you amp is already beefy and accommodates your speakers and room and listening environment, than stay with what you have. Most audible differences are subtle if at all noticeable. The true benefits of bi-amping cannot be realized with passive crossover networks of a speaker system. Bi-amping truly shines when parts of the passive network of the speaker system is replaced by active networks where each amplifier is bandwith limited at the input. For more detailed information about bi-amping, we recommend reading the following article Benefits of Bi-Amping from Elliot Sound Products".
Here's the link:
http://www.audioholics.com/FAQs/000524_biamping_biwiring.php for the article.
Of course Polk knows best about their own speaker, and the LSi 15’s are terminated to facilitate bi-amping, but it is not relevant to others expressing their views on the “true benefits” of bi-amping.
I know I am making a point that is irrelevant to what the original poster is asking, I just want to clarify where my first response was coming from. It was a mistake on my part.
