A:AnswerI have done this when I was an installer: use an 4 ohm resistor in line with the positive output of each channel.
Makes a better match to the receiver, and lets the resistor (if in a metal package with cooling fins) take more of the heat.
If you can find one, a 4 ohm non-inductive resistor works a bit better. Most receivers never notice the metal packaged resistors...and if you open a speaker switcher with a protection circuit, they use metal resistors heatsinked to the metal case.
A:AnswerIt does not have a typical subwoofer output driven by an internal crossover, so it really is not meant to be used as a 2.1 receiver. If you have a powered sub with its own internal crossover (left/right speaker inputs on the sub) then you can hook it up in series with the speakers, but I would recommend looking for a different receiver if you are planning on using a subwoofer.
A:AnswerNo... you need a commercial sound amp to connect to those type of speakers.. This Yamaha has 8 ohm outputs and is not compatible to 70v speakers
A:AnswerYes, this will affect the power given to each speaker. But it will depend on how big ( power draw ), the speakers are as to whether it would be harmful or not.
A:AnswerThat will depend on the broadcast power of your bluetooth device. I'm getting about 20 feet with a HOTT compact CD player. ( minimal broadcast wattage )
