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Merlin wrote:

Indeed the linearity of the Berning in comparison with the Lamm is quite remarkable, and indeed could be disconcerting to an inexperienced listener brought up on large increases on 2nd harmonic at the bottom end.

“The large increases on 2nd harmonic at the bottom end”. That would be interesting to discuss.  ML2, within the limits of own power and within a context of reverberation time restricted by it size of the room it can serve (very loaded statement) has overly dominating 2nd harmonic and to play properly it, from my point of view the out time should be slightly more idled then Lamm use by default. You say that in contrary the large increases on 2nd harmonic compare to Lamm would be beneficial… Interesting…

Merlin wrote:

I guess we can always go back to Doctor Gizmo's comments relating to the pure naked harmonic richness of the Berning design in comparison with all the competition hindered by the saturation of their OPT's. Harvey for all his faults , knew his subject matter.

Come on, Merlin, who care what Doctor Gizmo was tramping!? The BS about the “hindered competitors with saturated core” was something that Gizmo “injected” into you or you invented is right now?

Merlin wrote:

With regards to all other SET's I have used, I have myself been unable to accept the lack of transparency, extension and grip I have perceived at the frequency extremes with beat driven modern work - bear in mind this is not with reference to the musical genres that you specialise in.

It does sound that you heard good SETs and any good amplifier should do deliver that “animal frequency extremes” of the “modern beat”

Merlin wrote:

Indeed for classical work I often find a slightly under damped bass response to be emotionally evocative and of benefit to the illusion of the acoustic.

Hm, I would say yes and no… “Yes” because I know what you are wiling to say and “no” because to accomplish what you trying to do by making “under damped bass” is a wrong solution.

Merlin wrote:

I use the Siegfried to power a TAD 4003/ET703 combination. I use a ZH270 to power a JBL 1500AL in a 4cu ft vented cab below this - actively biamping.

Hm, the JBL 1500AL are wonderful driver but it has own JBL’s bass idiosyncrasy – it can’t breathe or care extremes. It has the typical JBL sound –very precise but it can’t walk on water – it is “not here and not there”.  Driven by a low power SET it becomes a very sad driver, particularly port-loaded. I wonder is your dissatisfaction with SET bass come from the fact the you do not have a LF section to care LF. Also, I have some perspective about your comments regarding ““large increases on 2nd harmonic at the bottom end”. There is nothing in your 1500AL/4003/ET703 configuration that can care upperbass and lower midrange. You indeed should have a tendency to prefer over-dumped tubes  and it is most likely where is your “under damped bass” preference comes from...

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