A:AnswerYes as long as the speaker is 8 ohm should be not a problem the amp is 200 watts so each speaker will get a 100 watts per speaker which is more than enough to be loud and good
A:Answeractually, you'll want to connect two speakers in serial for each channel to get to 4 ohms. connecting it in parallel will yield 32 ohms impedance.
A:AnswerYou only have blue tooth control of the reciever, what ever controls are available with the reciever thru blue tooth to cottrol the music is it. To contrl the eq would require a eq capable of blue tooth control. Equalizer would need to be setup manually to your preferances.
A:AnswerYou will have to acquire a bluetooth range extender the same as you would for a weak wifi signal. You have said the link between your PC and the receiver drops. If both devices are stationary, there is something in your environment interfering with the signal, like another bluetooth device. An adequate signal should be obtainable within a 30-foot radius of the receiver
A:AnswerMay be too late to help you but yes to all questions. It is a standard receiver. You only have two sets of speaker hookups so you would have to set up speakers on one and the subwoofer on the other. Bluetooth and headphones can be used.