Nice retro Heritage rig,
@Jerkface
Thanks! I fell in love with the KHorns and Belles when I toured Klipsch HQ back in '06, when they first started doing the Klipsch forums get-togethers. Nothing else in that shop, not Heresys, certainly not any of their modern stuff, sounded anything like those two speakers, and I knew I had to own a pair.
Yeah, don't overcomplexify the wire analysis. Chances are low that your line level interconnects are any sort of bottleneck or source of noise. Even if they are, you're using low gain amps (which is exactly what you want with Belles, good choice there), thus tend to keep the noise floor essentially burried.
Yeah, I realized after I talked it out earlier in the thread that the line-level is probably the *best* place to have a little extra resistance, because the impedance is already way higher than speaker-level.
A possible bottleneck is the amp's rather low input sensitivity, requiring quite a bit more than 2v for full power, enough to clip the output of some AVRs. Granted, you probably never need full power, and if you used it it would probably rip your ears right off your head. So it's probably not an issue, and you have a nice, quiet rig feeding your Belles. But clipping of preamp output is a possible bottleneck.
Actually, I'm not super worried about this with the Denon unit - its *fixed* output is 2v, and it can go up to 6v on variable out, which is pretty much what the Quicksilvers are looking for.
At some point in the future (no hurry right now - the Denon is super-clean and does everything I'd need a pre to do in my rig, since I'm not running any analog sources), I plan on shopping for a tube pre to pair up with these badboys, but lifestyle choices are going to come into play here - if it doesn't have a remote, for example, it's out.