Any High End Tube Preamps with *gasp tone controls?

I'm all in for a Loki TC placed in a tape loop. I use one and the change it makes when needed far surpasses any potential down side. Used between the amp and preamp, I'm not so sure. If you don't have a tape loop, I'd seriously consider placing it between the source and the pre-amp. FWIW.

@invalid the Space Tech Lab VSUB-100 looks really interesting.

For myself, I’ve always been really interested in the Decware ZROCK2 with its simple 2 EQ curves. 

McIntosh MX 110Z in the house. This thing loves Jazz. Tone controls are nice but maybe not at the most useful frequency? I saw something about that on an another post. The loudness is pretty useless. Just bloats everything out. But Jazz is wonderful sounding...

Next week Luxman CL35 III.

I tried a Loki Mini last night and it muddled up everything in my setup. I'm trying to get ahold of a Max.

McIntosh MX 110Z in the house. This thing loves Jazz. Tone controls are nice but maybe not at the most useful frequency?

Ok..I’ll bite. What are the most useful frequencies?

Jazz is wonderful sounding...

Why only jazz? What strengths and weaknesses made this old tuner/preamp good with jazz but less ideal with everything else?

The MX110 was part of the first stereo system that I ever heard back in 1965.  Pretty sure that more modern McIntosh would be worth a listen.

I think that there's a range of bass (right?) and some music I'm used to hearing bass with, I'm not hearing with the MX110. I think that's because the bass is at a certain frequency (or range) that isn't boosted when turn the bass knob. Someone correct me if I'm wrong. 

I wish I understood why certain components sound good with particular genres. I know it's a thing. Someone smarter will have to explain why.