A:AnswerThis receiver has the switch type jacks that take the wire of the speaker wires. It should work even if you have to take the plugs off and use just the speaker wire.
A:AnswerHi Wvman, our receivers does not support 3rd party hardware attachments such as Bluetooth receivers. Upon checking our receivers, I am afraid we do not have Bluetooth capable models that can fit your entertainment center. If you can go away with at least 6.77 inches, I suggest getting the STR-DN1070. It is Bluetooth capable, supports HDR, and has Hi-Res audio passthrough. Thanks, -Mark
A:AnswerDuct tape. Seriously. Plug the wires in good and run a piece of duct tape over them. Another technique I use is to strip back twice the amount of wire I need, finger-twist the wires and fold over halfway. That doubles the wire diameter thus giving a tighter grip.
A:AnswerWhen using all four it makes them 4 ohm and bad news for extended play let alone loud.There are receivers, even stereo ones,that are made to do that but this isn't one.