Hello
Beryllium has 3-4 times higher stifness/weight than titanium and aluminium. Very hard to work in audio due to high internal loss. I've never heard a smooth solid amp on such - sorry, that's it.(they might excist???)
Solid amp has third harmonic distortion and SE amp high 2 harmonic. Test based on humans, seems that we, humans, prefer 2 harmonic distortion. Some claims that this distortion is similar to the distortion from regular air.
All sound is distorted due to airs molecyles. Regular tweeters is extremely distorted, whether it's expensive or not. I worked many years with almost all speakers availebly(not ALE or Goto and WE), but almost all others famous JBL, Altec, PHLs, ribbons, Audax, Scan Speaks, Vitavox, Coral, Goodmans, etc etc......
After I heard TAD beryllium, I sensed that something was wrong with all other equipment.....
Afterwards, I've been very fast to detect cones material constructing and I feel that a speakers sounds depend up to 95% of the cone design.
I know a guy who constructed a Stereophile class A speaker and he claims as well that we, humans, need distortion in some terms.
Well, it's true that I do not know much about audio, tubes and speakers - but I have never ever met anyone who really knows what audio/sound is about....
Sound is still one of sience most unanswered questions - take a look at any forum and you'll see who much people disagree. Moreover, most of these people has never played an instrument for real or made recordings in a pro Blue Note studio....
I built some tube SE amps myself and heard many SE with all kinds of trannies. I prefer permalloy and amorphous cut cores myself. Triodes are prefered for output. This combination gives very high distortion - and I need that distortion for my TAD stuff....
For Foxtrot - I do not know your budget, but if it's low, I would go for the TSM-300, a Vincent SV 233 which you can bias to almost class A and I think the new Cambridge Azur 640 is great though I've not heard it yet.
Well, for Kevinkwann, any experience with TAD or similar????
It seems that you a real hardcore audioman and you might have got some tricks or info for share....
Anyone who need a pair of NIB JBL K2 1400nd or Sony sub 11 spaekers???
Altec 515A Hollywood???
Vitavox S3???
TAD 1602????
Thanks, Tadman