A:Answer6 ohms should be fine, since that is greater than the 4 ohms minimum spec.
Typically, a lower impedance speaker will pull more current from the power output stage, but will also likely increase the distortion.
The previous answer makes no sense at all.
A:AnswerI actually purchased this receiver as a gift but (based on your question), your DVD player may only provide audio from one output at a time. This is unusual (and a poor design), but I recall having this problem previously.
It could also be a problem with the cables and/or adapter
that you're using. Try using a different cable/adapter and disconnecting one of the two outputs to see what happens.
There may also be a menu setting in your DVD player that may act as a switch (of sorts) and mutes the audio from that output jack.
You may want to consider testing another DVD player in the same scenario.
There's also the remote possibility that the receiver itself is defective. If it was purchaeed recently, perhaps it can still be exchanged?
Good luck with resolving this problem!
A:AnswerWhat source are you trying to play (radio, TV, Sirius, etc.)? If you have to pump up the volume that loud the issue is probably with the source, not the receiver.
A:AnswerIf your subwoofer is 'powered' meaning that it has an AC power cord and a built-in amplifier, then yes. Because most of those universal, powered subwoofers have a "Speaker or High-Level" set of input terminals in addition to the "Line-Level" RCA input jacks. You can run a set of speaker cables from the Yamaha receiver to the powered subwoofer and then from those same set of 'Speaker or High-Level" terminals to the Left and Right satellite speakers.
A:AnswerWhat are you trying to accomplish? Your question was vague. Is it an amp or active speakers? Be specific with a model number and a precise description of what it is you are trying to do.
