Need cable advice tome reduces mids

Would be helpful to know what equipment is in your system. That said, sounds like you might benefit from trying some silver interconnects, but they tend to be above what you’re looking to spend. BUT, I recently discovered LavriCable out of Latvia and they’re selling 5N silver interconnects at more than reasonable prices that might help tighten up your midrange situation. I’ve got their Reference XLR interconnects and they’re excellent — detailed yet natural sounding and no bloat anywhere but still with very good tonality. Their 1m Reference costs $154 per pair and the Ultimate that employs 40% more silver wire goes for $234 per pair. I’d go for the Ultimate if you can swing it. Several others here have since tried LavriCables and everyone so far has been pretty thrilled with the improvements they’ve brought to their systems. Just one under-the-radar option to explore, and best of luck in taming your midrange issue.

https://www.lavricables.com/cables/reference-silver-xlr-interconnects/

https://www.lavricables.com/cables/ultimate-silver-xlr-balanced-interconnects-2/

Yes, what is your system and venue. There is a place to put photos and your components under your UserID. This would be helpful as there are lots of variables that could cause your problem.

@dtapo so few thoughts on this…

1. Your earlier post on new amp causing fatigue. Amplification in question is Denafrips, correct?
2. Your Canare cables are neutral. They don’t emphasize any particular bandwidth or frequency range. They’re not the best cables in the world but by no means are they contributing to this

3. You have kit speakers that you built, correct?

The fatigue you’re talking about in your posts is usually a result of overemphasized presence region. It’s not just mids. It’s a hump in that frequency region and the only way to get rid of it is to remove the component that’s causing it. Your amp/preamp/speaker combo is not a good match. 
My recommendation would be to dump the amp and potentially even change the speakers. No cable will fix this issue. I would also not entertain band-aid type solution such as an equalizer to remediate this problem. If you continue to use this system you might even end up damaging your hearing. 
 

You have a Hegel amp that without the same system doesn’t cause this problem and if that’s the case it just proves what I’m saying here is correct. 
 

That’s all I got for now. You decide. 

 “within” the same system is what I meant to say…autocorrect had other thoughts obviously…

audphile1  I believe you are correct, that it's the synergy between these components causing the problem. I was hoping that there would be a solution and I could salvage the system. In my listening sessions, the peaks never go above 75dB, so it's not a "loudness" problem.

It very well could be a synergy issue. But first, what is the size and layout of your room? Are you using any wall treatments to absorb standing waves? I'm referring to mid to high frequencies.

It’s the speakers that are at fault. Peak in the midrange. Use DSP to correct this. Don’t bother with an analog equalizer. These add phase distortion.

My experience would suggest to try interconnect made with 20 awg conductors, preferably OCC copper, The larger the diameter of the conductors in the cable, the more emphasis will be put on the low end compared to the rest of the bandwidth, this might help.

Wire is not a tone control!

Wire is not a tone control!
 

@jasonbourne52 and I do not see eye to eye on much, but in this particular case I agree.  Especially because your issue seems relatively so pronounced it’s better to attack it at the source, which is why several of us have asked about what’s in the rest of your system.  So, what’s in the rest of your system?

System is:

Philharmonic BMR monitors - older version with scanspeak woofers pulled out 2.5 ft from front wall and about 3 ft from side walls.

Audiolab CD transport

Denafrips Pontus 2 DAC

Denafrips Hestia/Hyperion pre - power amps

Basement listening room 15 x 30 with full carpet. Cloth curtains are hung on side walls (first reflection) and back wall. Ceiling is exposed floor joists. Very little reverb.

As an experiment, I ran the Hestia pre out to my 30 year old NAD receiver which has a power amp input. Even though it has only 35 w/c and slightly woolly bass and not the best treble in the world, I liked the sound better. It didn’t irritate my ears the way the Hysteria does. The Hestia/NAD combo also sounds better than the NAD using it’s own preamp.

When I still had a 300B SET amp, the speakers sounded sweet, I just couldn’t get enough volume.

How far are your speakers pulled our from the front wall, and how much do you have them toed in?  Sometimes changing upstream equipment necessitates changing speaker placement to account for the different voicing of the new gear.  Hey, at least it’s free to try!