Tannoy Westminster amp matching question.

Charles, thank you for your encouragement. It reads as if it has plenty of DH SET magic, and I've read about people driving Sonus Faber Guarneris adequately as well so should be fine power wise.

Phaelon, I think that its the original, I'm waiting on answers to questions. Its a pity I wasn't looking in Oct. It looks like one sold on ebay for just under 4k US ( Grrrrrr isn't it always the way ) I am patient man though and my AMR AM-77 will be very good I suspect. Its suppose to sound like a very powerful SET, and in some ways it does. But of course in comparison , tonality and getting the balance between the performer and the rest of the music, is where the true SET will win. IMO. ( I don't suppose your friend wants to sell his ;-). )

Bvdi. Thanks for joining in. I suspect in the long run you may well be right, but you know what its like. I have a yearning to try and get the SET magic back in my life and I'm going to try it out. My system that I put together with SET's etc, allbeit not extensive, provided me with most satisfying period in my hi-fi lifecycle to date. It almost feels a bit like trying to recapture my youth, impossible but tremendous fun trying. If I were going to try a different design, I might try Shindo. Don't go there yet everyone.

Great chatting with all !!! Thanks.

Borg, The older Solistas are fine amplifiers for the money, but the MkII version is almost a complete redesign with much better transformers. It’s not just an incremental improvement. Although, like Bvdiman, I’m concerned about the SET matching - I like the effortlessness that speakers achieve only with adequate power - I’m certain the Westminsters would benefit by being paired with MkII version.

Borg,
Phaelon makes a good point. If the MK II version is that much improved(transformer quality is crucial for great SET sound) I`d exercise some patience and get the better Solista amp. Your speakers deserve the best quality amp you can afford.My SET has double C-Core transformers custom built in japan.I believe that plays a 'major' role in the superb sound they make.I`d not compromise transformer or power supply quality in an SET amplifier.
Regards,

Borg7x9, unless you are in a small room listen to what Bvdiman is saying, or you could be making an expensive mistake.

SETs have certain properties. One is that they essentially make no distortion at low power levels. This is unusual- most amps have **increasing** distortion below a certain power level. This is why they have that 'inner detail' that is part of the description of any SET.

The 2nd thing about SETs is the lushness. This comes at slightly higher power levels and has everything to do with the 2nd harmonic distortion that appears at moderate levels. As we can see, the human ears does not mind too much about this distortion.

The final aspect of all SETs is what happens above about 1/4 to 1/3 power. The higher ordered distortion components begin to appear. If the speaker has enough efficiency, this will only occur on louder transients. However, on these transients are also the higher ordered harmonics, which, it happens, that the ear uses to determine how loud a sound is.

The result here is that the SET appears to have far more 'dynamics' because of these loudness cues than it should for such a small amp. You will hear people talking about this all the time.

However, as you can see this is all based on how the amp distorts. The problem you are up against is that you actually need some power. The speaker you have has got bandwidth, and that is something that higher power SETs don't have. To be really successful with an SET you need a horn-loaded speaker with about 103 db at a minimum! That way you have a moderately-powered amp (12 watts, no more) that might still have some bandwidth. Its a trick!

However, SETs are not the only amps that have distortion going to unmeasurable as power is decreased. There is at least one OTL that does that as well. I think there are a few push-pull triode amps as well. The trick here is how the driver circuit is designed. This is a feature you want, because its that first watt that gets you that 'inner detail'. The issue is you need power and bandwidth too (if you really want to hear what the speaker can really do).

I agree with Charles1dad:

Your speakers deserve the best quality amp you can afford.

There are very few SETs that will fill the bill- you can count them on one hand. OTOH there are a number of push-pull amps (including at least one OTL) that will suit that will give the the inner detail, power and bandwidth. BTW all of the ones I am thinking of are zero feedback.

Everyone has an opinion about what amplifier type is better than others.You could find many sucessful and talented builders of SET amplifiers who would disagree with atamaphere`s viewpoint and in fact make a very compelling case opposite of his.Borg,you`ve used SET amps and obviously came to your own conclusions based on actual listening experiences.SET amps have flaws and so do OTL, push-pull tube and any other amp topology you can mention.

I believe a variety of amps could work well with the Tannoys,Borg you like SET amps for one very good reason,they sound fantastic and really involved you with your music.I`ve heard OTL amps,they were good, but I find SET more realistic and natural to my ears. Others will hear things differently and that`s to be expected.

Borg, I hope you can hear the Atmasphere OTL amp and a good PP tube amp and compare to a good SET amp. I don`t believe the Viva Solista is a potential mistake at all. Listening will settle this as it always does.
Charles,