Your response does not address the question (which by definition makes it a Strawman logical fallacy). And not knowing me, you'd be hard pressed to know what I've done and what I've not done. But FWIW, I play string bass and have played in jazz bands. Sheesh. I suspect you've no idea that your response here was simply so much rubbish.Shouldn’t bass be like the music in which it exists rather than a certain brand of amplifier??Yes, it’s obvious from that answer/question, you have not sat in a jazz venue when the unamplified drum kit is being severely belted.
It’s closest in audio as I said (Krell like bass) and similar amps to it, like Gryphon etc etc etc and defiantly not OTL and most tubes with the majority of hard to drive hi-end lower impedance speakers.
You are right about OTLs except for the larger ones, which have no troubles playing lower impedances. But the ability to play a low impedance speaker is not the same as saying the amp has excellent bass.
If you're into bass, you want unmeasurable square wave tilt at 20Hz (which is something our OTLs do). If you know what that means you also know that most tube amps can't do that. Getting good bass isn't about driving low impedance so much as it is making sure that the amp has the LF bandwidth, that its low frequency bandwidth does not exceed the timing constants in the power supplies and otherwise has low distortion in the bass region. Its not about output impedance, since an amp with higher output impedance will simply have to be used with a higher impedance speaker, and that speaker can then demonstrate that the amp does indeed have 'good bass'. I do this all the time at audio shows; for a long time we had the Atma-Sphere Bass of the Year list on our website, which was a list of recordings that shook the walls very nicely.
In solid state amps that are direct coupled, since the 1970s they have had enough feedback at 100Hz that they have no problems playing good bass. Once you have that feedback several things occur. The first is that the amp can reject power supply noise as the feedback will correct for that. The second is that the distortion at 100Hz will be low (we've been seeing that for decades). At this point the only real concern is making sure that the power supplies don't sag under heavy demand and there are plenty of high end audio solid state amps that fit that bill. The feedback thing is the key here; if the amp employs it and the power supply does not sag, it will have 'Krell like bass' since the Krell has sufficient feedback at 100Hz and otherwise has good supplies. So it then follows that if it has **more** bass then its the result of a coloration and in a nutshell, that's not happening with a Krell at that frequency.
The differences you hear in solid state amps, as long as the power supplies are not an issue (and this includes class D) are going to be in the midrange and highs. Admittedly, you'll hear some class D amps that really can't do the bass right, but you'll also find in those amps that they have power supply problems (which I excluded via the caveat above). Now you might be able to get a slight improvement in the bass by improving speaker connections and other minor tweaks but that has nothing to do with the brand if those tweaks are applied across the board.