4ohm or 8ohm on B&W CDM-7nt?

Hi everyone,

Sorry for the dumb question, but I am wondering if there will be a difference (quality or loudness) using my Arcam AVR-300 in 4ohm or 8 ohm to drive my B&W 7nt's. I am not sure what exactly the difference will be and feel I have searched google to find so many conflicting answers.

I figured I should be able to get a decent answer here.

Thanks,

David