Amps under $5k that are resolving at low volumes?

"I wasn't able to tolerate SS gear at or below the $2k price of the Prima Luna when I bought but am open minded about gear costing more... "

Looking at your system, I think there's a good chance your issue is with the 1.7's and not your amp than you amp. I had a pair myself, and I just couldn't get pass the highs. That big strip of aluminum they use for a tweeter, sounds like a big strip of aluminum.

So, at this point, you'll probably need to make a choice. Either you get a new pair of speakers that are easier on the ears, or you can continue on with them, and keep buying components in an attempt to offset what the speakers are doing. I would recommend replacing the speakers because I like fixing a problem directly. But I realize you'll probably want to keep the 1.7's because they get good reviews and a lot of people like them.

Of all the amps I tried with the 1.7's, my Rowland 112 was the one I liked the most. Its very soft in the highs and it helps offset the ribbon tweeter. Also, I would stay away from low power tube gear like you currently have. Some of what you are hearing is probably due to the amp straining. I think you can use your Prima Luna as a preamp, so I would just try an amp first.

You can easily get a Pass INT-30 or INT-150 for under $5k used here on Audiogon.

You won't be disappointed. If you have your room and speakers acoustically optimized and well set up, I'd recommend the INT-30 as it recreates the acoustic venue the performance was performed - better than the 150. The INT-150 is more dynamic.

If you Prima Luna has pre-outs, and if that piece will perform to your level of expectation (I have no experience with this piece), you can get a Pass XA-30.5 also. We used one with our moderately high end system for a few years and enjoyed it. It really is an over achiever.

Kindest regards, TJF

Isn't this more a function of the speakers?

I would tend to agree with Zd542 about the speaker being the issue. After moving from a private home in the suburbs back into a city apartment I also looked for a system that I could enjoy at lower volumes. What I discovered in my research was that this seems to be more a function of the speaker than the associated system. There are not many speakers that really play well at low volumes.

IMHO the best speaker that I heard at low volume was the Harbeth SHL5. I heard a few others like the Vandersteen Treo and VLR Wood that sounded almost as good at low volume but the Harbeth stood out from the group. I had foolishly sold my Super HL5's years ago but I lived with them for more than 2 years. I ended up with the Vandersteen VLR Wood and though not quite the equal of the Harbeth, it is still a very enjoyable speaker at a much lower price point. YMMV.

I suggest you talk to your Magnepan dealer about your dilemma as he may have suggestions specific to your speaker.