krell hts 7.1 vs proceed avp2?

The +6 option on the AVP2 is for multichannel SACD inputs, goes like this. Main R Main L Center C R surround L surround and S sub woofer. If you have the none +6 option, then only 2channel for analog sound, as you know Super Audio CD (SACD) required 6 analog inputs, hope this would help.

I have listened to both processors hooked up with a Sunfire Cinema Grand for movies and a Pass Lab X-350 for 2channel music. I'm keeping the AVP2 for it's outstanding 2channel music and slightly better movie reproductions as well. Final word, AVP2 hands down. If you want multichannel inputs, then go with AVP2+6 option. It's not that easy to find one these days since Proceed is no longer in business. It's popped up once in awhile here on Audiogon, so good luck, you won't be disappointed.