Hi guys and gals. Relatively new to Audiokarma. I've been reading things on here for a while and have learned a bunch but I'm still pretty much a noob when it comes to vintage gear. In the last year I have been fortunate enough to purchase 2 Kenwood receivers, KR-6600 & KR-6340 Quad. I used the quad for a couple of months before I stumbled on the 6600. I liked it a lot but going from 35w RMS to 53w RMS seemed like a no brainer. I hooked the 6600 up and never looked back....until this week. I wanted to take the lid off the 6600 and clean the pots / dust out the interior. I hooked the 6340 up in its place, fired it up for a test run and couldn't believe my ears. The 6340 made my speakers come alive! I'm not sure was I was hearing before but it wasn't close to this. The 6340 out performs the 6600 by a long shot. The difference is really incredible. What I'm trying to figure out is this the 6600's way of telling me it's time to recap? Could it be simply be a better pairing to my speakers? If the 6600 needs recapped am I better off parting with it? There is only one "expert" vintage repair guy in about a hundred miles from me and he is uber slow, expensive and has some poor customer service ratings. I'd attempt to recap myself, but there is a bazillion of those things in this beast. Suggestions / Guidance? If this is posted in the wrong place I apologize. Thanks in advance for any assistance you can offer.