Solid State for Rock and Tubes for Jazz, Yes or No

Chad, I'll agree it is a very system dependent thing.

As I outlined above, I can clearly hear the difference as others have described between the more highly damped bass (and sound overall) and less damped bass by switching between my BC ref1000m and TAD Hibachi 125 amps.

Which do I prefer?

With my main large OHM F5 series 3 speakers, I might lean towards the less damped sound with most smaller ensemble jazz, maybe not big band and similar scale classical, but for psynth/electronic music, big band large scale symphonic works, and other larger scale types of music, the high damping brings out the best with the large OHMs overall I would say.

With my smaller OHMs, it might start to lean more towards less damping.

With my smaller monitors, Dynaudio Contour 1.3mkII and especially Triangle Titus, things start to favor the less damped sound. I would love to run my Triangles off a tube amp someday to test those waters!

OF course those are just my observation and findings with my gear, but it does support the premise that whats best is very system dependent.

For quite sometime I`ve felt the amplifiers with high damping factor produced bass that seemed contrived and artificial.They just did`nt sound like bass instruments do in natural/live settings.It`s as though the normal bloom, tone,fullness,body and natural decay of bass instruments are sacrificed for enhanced tautness,tightening and 'slam'(organic vs hifi oriented traits it seems).I`ve never understood the advantage of ultra DF(ABOVE 100).Are there any speakers with Q factors so high that this level of DF is mandatory?I `ve yet to hear live bass produce the 'tightness'sound some do seek/prefer. I acknowledge it`s a matter of audio system preference like many other desires/choices.A friend and I attended a jazz club recently and listening to an unamplified stand up bass,the rich texture,warm tone and sheer density of that instrument was just beautiful. Did`nt matter if he plucked or played con-arco the full and rich sound was always present. An overdamped amplifier might just screw that up it you want that realism preserved.

My own sense of a more realistic and natural bass is just as Chad and Atmasphere described. I find that a good tube amp with the right speaker can provide a very natural and believable bass(if perhaps less spectacular at times).This is an interesting topic.
Regards,

Assuming that the amp-speaker combination is basically compatible, one can get better dynamics and "slam" from tube amps than solid state. Try an OTL amp, you will be shocked at how much more lively such amps will sound than a solid state amp at the same average volume level. Solid state amps can provide a lot of power and can be made to play at loud levels, but, most sound dynamically flat at lower volume levels compared to a good tube amp, particularly OTL and SET amps (assuming the speakers are efficient enough for the very low powered SET amp).

While not reaching deep, and often not being able to do the room shaking thing, I like the bass from SET amps--it is tunefull, varies with the qualities of the particular music (does not sound generic or the same all the time), and natural. The bass on solid state amps can also sound very good. I know it is a generalization, but, I often have more issues with tube pushpull amp bass--everything seems to sound the same--punchy, but, sort of uniformly so.

Charles1dad makes allot of sense to me. But I think he paints with to broad a brush with his last sentence about tube amps. Natural and believable bass is a product of the ears and experience of the designer and how he implements those designs. I think by now we have all heard excellent and compelling bass from both technologies. It's really hard to pick a clear winner, at best, all you can do is choose the one you prefer.

Larryi's post makes me think that this is not as simple as tube v. solid state. There are topologies to also be considered. In the tube world, there is SET, push-pull, and OTL. In addition to triode, pentode and ultralinear designs (some tube amps have switches to select between these).

In the SS world, there are Class A, AB and D designs.

All of these have their own unique advantages and disadvantages, and each will work better with certain speakers than others. No one size-fits-all solution exists.