My Bottlehead amplifiers are wired for eight ohms, if I connect four ohms speakers with them would there be any difference in sound quality if my amps were wired for four ohms?
Distortion will be a little lower using the 4 ohm output and bass is often a little tighter than it would be using the 8 ohm output on 4 ohm speakers. It depends a lot on the speaker used. You can try both ways and see what you like without causing any issues.