You can try it, but don't get your hopes up. Receivers like your Pioneer were designed to work with very efficient 8 ohm speakers and with the right speaker they can sound quite good. I personally have not had good results trying to drive 4 ohm speakers with vintage receivers. 8 ohm speakers with Alnico magnets are no problem.
4 Ohm Load
I've got a Pioneer SX-636 receiver at my office that I listen to every day. I've been curious how it would sound if I brought it home for a night to hook up to my Vienna Acoustic Beethoven Concert Grands. The VA's are 4 ohm and my only concern is that the receiver may not enjoy trying to push that load. Anyone have an idea if this is no big deal or smoke waiting to happen? There's a good reason why I'm curious to try this but I won't bore you with that.
Thanks,
Mike
Thanks,
Mike