Title says it all. I know that the manual says 6 ohms and I tend to stick to what the manufacturer suggests. I do wonder if the 4802 could handle my Kg-4's. Has anyone used 4 ohm speakers with a Denon? The 4802 has a pretty hefty power supply so one would think that it wouldn't have a problem with delivering the current. Is it strictly a heat issue? Would a well ventilated 4802 driving efficient Klipsch be okay? More to the point...has anyone here done it and what was the result? I've got a Yamaha right now and I've been considering an upgrade to a RX-V3200. The problem is that I really like the features of the Denon line, especially the 4802 with it's adjustable crossover. I really don't want to buy new speakers because I love the Kg-4's. I've considered Ebay for a used set of 6 ohm Kg-4's but I really don't want to buy another set of speakers. I'd rather put that money into the best receiver that I can afford. FYI: It's a choice between either Yamaha or Denon. I really like the sound of these two lines. That is the ultimate factor for me.