SET amp recommendation


Recently made the switch from Cary 805 AE to Atma Sphere OTL pre-amp and amp. The OTL dynamics and sound is where I live now, but still looking back over my shoulder at SET. I still have a Cary SLP 05 preamp with no one to play with. Can someone give me a recommendation for a good used SET (any configuration) amp for $1,500 or less. See a lot out there, but could use some guidance.
erfranke

Showing 8 responses by charles1dad

Erfranke,
I hear ya, some SET amps are colored and others are crystal clear, much variation is available.
In your price range a used Grant Fidelity 300b (with the Shuguang Black Treasure 300b) would fit your needs, Reviews say it`s a quiet amp with good transformers(crtical for SET sound quality).
Best of Luck,
If the 12 ohm load of the zeroformers remains relatively flat a 300b amp would love this load. If the amp has "good" quality transformers and P.S. as audiofeil mentioned earlier, I believe 91db speakers in a smaller room at normal listening levels will be fine. 1500.00 budget does limit choice to some degree(good transformers and P.S. are`nt cheap).

I have used my 300b SET amp with 89 db speakers(8 ohm) in a friend`s system(large room) without any promblems what so ever.
Herman,
This much I know, my speaker is a 14 ohm load(94db efficient) and it is a splendid match with my 8 watt amplifier, sound levels usally 75-85db(in a 14x26x8ft room)If his speaker is truly 91db efficient and he listens at modest levels(his stated preferenc)i.e. around 60-75db range the speakers are only drawing fractions of a "watt" of power.
He says his room is small, With a good quality 300b amp he will be fine.

It`s my understanding/experience that tube amps like a higher ohm load that`s relatively flat.
Charles
Thanks Al,
I knew there was some definite advantage for tube amps driving higher ohm loads. Higher voltage output, I`ll remember that now.
Charles
Al, you are the man when it comes to clear technical explanations.I don`t have an engineering background but my ears sure told something very good is happening with the higher ohm speaker loads and tube amplifiers(particularly
SET amps).
Best Regards,
The assumption that 300b SET are all lush and colored is as inaccurate as stating all solid state or all push-pull tube amps sound the same.
There`s such a wide assortment of character among the many 300b amps available, slow.fat and syrupy to fast,tight and lean.
What circuit/Parts quality?Level of transformer and power supply?Cary,Wavelength,Yamamoto,Coincident,Tron or Art audio, they`re all different.
Which 300b tube? Generic chinese,JJ,Sophia,EML or W.E.?
What driver tube? Capacitor,interstage transformer,choke or direct coupled signal path?
Far too many choices in amp design/implementation to stereotype the resulting sound quality.
Erfranke,
I would`nt bother with a 300b SET amp if it s not quality built, it will just disappoint you. Poor parts,transformers etc. won`t get you anywhere.

Personally I`d take a premium made SET over an OTL amp but of course individual preference rules.
Charles