Tinnitus sufferer: is it the speakers or the 24bits/192kHz

really depends on where your tinnitus is - mine is like 8khz. i've always been bothered by metal tweets even before it happened (an ear infection, not even rock concerts sigh). loud music does aggravate it afterwards, but i regularly listen to my YGs in the 90s on a friday night without worry. i'd say alcohol and caffeine are bigger contributors.

said another way, i wouldn't resort to sleepy speakers with tubes as a solution. i think an efficient speaker makes sense. 

I've had mild tinnitus since birth, but fortunate enough that it really hasn't bothered me in the fifty years I've had it.  I have similar experience as keithr in that metal tweets really bothered me in my 20s - before I really knew what was going on.

Now that I've come to know the nature of this ringing between my ears, I agree with most everything posted.  I've experienced that listening at moderate levels at the frequencies where my tinnitus is sensitive actually helps.  I've also found I can sense the tinnitus more easily when I'm in an extremely quiet environment; otherwise, my brain just blocks it out.  However, I think there's a problem if you "overstimulate" that frequency area (liken it to people without tinnitus experience ringing in their ears after an extremely loud transient sonic event).

I'm actually thinking of moving over to speakers that emphasize the treble region (currently on a pair of Dunlavy SC-III.As which I am loathe to move from - love the sound), since as my hearing ages - I'm losing treble sensitivity, and couple that with the ringing - I feel I'm missing more and more detail in the upper registers...

I also have tinnitus for over 30 years. A few things. Do you use an SPL gauge when you listen to music? You can download a free one in an app store. When I first used one, I was surprised at how loud my normal listening level was. 

I have a pair of Audeze planar headphones and I find I can only listen to them for so long and at relatively low levels. 

Have you had Covid? A lot of people experience various forms of inflammation due to Covid. I personally had something called Covid Toes and it coincided with very heightened levels of tinnitus. It took weeks to come back down to normal.

Sometimes, mine is aggravated if there is too much high treble, above 8 kHz or so. Try turning down the tweeter of the Maggies & see if that helps.

I have tinnitus and hyperacusis. These are different and many people don't know the difference.
In the real world, things like loud restaurants murder my ears.
I've found with sound systems, SPL is not the problem for me. Rather, rooms, headphones, or components with noise, distortion, or ringing trigger my symptoms within seconds. However I can listen in a well treated room to a 2.1 or HT setup at full volume for hours without issue.