CJ PV-2ar or PV-7 or ARC SP-6 for Klipsch Heresy?

A cj might have too much gain to use with high efficiency loudspeakers.

But to say that the noise floor of tubes in general is too high for speakers of 100 db or more is untrue. The proof of this of course is that most horn speakers are used with tube amps, not solid state. My speakers are 98 db and I have to put my head in the mouth of the horns to hear the noise floor.

I agree with Atmashere about "noise floor". With my Tube Technologies CD driving the Heathkit AA 151 into the Klipsch Heresy 1's, it is dead silent between cuts.

I'm not surprised that you have to use the tone controls set they way you do, as Herseys are extremely colored with a balance that leans towards the mid and upper mids. Nice speaker late at night and at low volumes but they fall apart when pushed and have no usable frequency response below 45hz and that is being generous.

They do respond well to tweaks and can be tamed. The caps probably need to be replaced in the crossovers, which may further throw the balance off. While you are at it you can change the internal wiring and stuff them with acoustic insulation, to get another 4-7 hz of bass.

Getting them off the floor at least 18 inches will dramatically improve the soundstage. They are a fun speaker to have a fling with but I found them to not meet my needs for a long term relationship. Your feeling may differ, though.

If you can pick up a Melos SHA1 I found it to work well with them. YMMV!

Enjoy.

As I have mentioned in other threads, dampening the mid horns, and tweets, as well as the inner front panel of the Heresy, makes them a much better music reproducer, especially at higher listening levels. It is the most bang for the buck "mod" one can make to any Klipsch. I modified many pair of Heresy's, and, my customers, and friends, were, and still are, delighted with the positive changes. MrD.

Raymonda these are all substantive recommendations and worth my pursuit at my "fling" stage with the Heresy's. One mod you mention is the first I considered immediately upon opening them up, replacing the "zip chord" internal wiring. Curious that Klipsch modifier blogs I've read suggest accoustic stuffing, cabinet gasket/sealing, crossover upgrades, porting and replacement drivers but don't comment on the internal wiring. Paul Speltz said he'd sell me Anti-Cable buy the foot for that purpose.