Why?
I'm not sure Audioholics has that info on their review of this receiver, but I will show you some of the highlights of it's power:
The Denon AVR-3805 didn’t appear to break a sweat driving the 4-ohm impedance presented by the RBH Sound 1266-LSEs and 661-LSE speakers. In fact, the rated 120 watts per channel was sufficient enough to drive the Reference 3 System speakers to a steady 97dB SPL at the listening position without any audible distortion. For those of you who are wondering, this translates into approximately 105dB SPL (average continuous) from 1’ from the front of the speakers. In the Reference room, the Denon receiver was parked at -10 on the digitally-controlled analogue volume to produce these levels.
Bi-amping the Denon AVR-3805 for 240 Watts/channel in the Fronts:
A $1200 receiver that gives you 2 x 120watts per channel to the main speakers in a bi-amped configuration while still allowing 5.1 surround? Absolutely. Read on... Using unused "Surround Back" amps to bi-amp the main speakers was mentioned by Gene DellaSala in his review of the Denon AVR-5803 receiver and the same procedure holds true for the AVR-3805. Why let those unused surround back amplifiers go to waste if you are not utilizing either them or Zone 2 speakers?
Based on the fuse rating of 7.1 amps, we can deduce that the power transformer is around 850VA (7.1A x 120V)
