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In Reply to: RE: deciding on SET over push pull posted by drlowmu on December 19, 2014 at 09:27:16
>>> Has anyone here answering looked up the specs on his speakers ? I think not !! They are 100 dB efficient. <<<
Jeff, as you know, there is more to a speaker being ideal for SETs than mere sensitivity. Impedance, phase angles, driver Q and bass alignment. A SET might deliver some nice results with his speakers, but it would be hit or miss and I doubt that the "hit" would be particularly convincing.
Cheers.
"In the beginner's mind there are many possibilities, in the expert's mind there are few." Shunryo Suzuki
Follow Ups:
Hi Daniel,
I would think, with a really good SET amp, and a commercial Klipsch speaker, the factors you mention will not be much of a problem at all.
Triodes drive well, into a variety of loads, and especially with a speaker having 100 dB sensitivity.
Can you explain to me why you are thinking it would not be too much of a "hit" ?? I do not really understand your concern. I wonder if I am over-simplifying this, or if you may be over-complicating the original poster's query?? Neither of us, by nature, seek to do the wrong thing !!
Jeff Medwin
Sorry Jeff, I might have unintentionally implied that you might have sought to do the wrong thing. Apols.I don't think I am over-complicating the OP's question. To clarify:
A driver in a bass alignment designed to be driven by an essentially zero output impedance amp may sound okay with a SET amp, but it is not ideal. Add the 2 - 3 Ohms SET output impedance to the mix and things change... the alignment transitions to under-damped and becomes relatively indistinct and lacking impact, even if giving the impression, perhaps, of increased weight... As I said, it might sound okay.
Cheers.
"In the beginner's mind there are many possibilities, in the expert's mind there are few." Shunryo Suzuki
Edits: 12/21/14
!
The Mind has No Firewall~ U.S. Army War College.
Hello Cleantimestream,
If you would be able to share a image of the impedance plot I would greatly appreciate that, I could not find one.
Bob
neither could I.
Klipsch has always used transformers to match compression drivers with dynamic woofers, {The Khorn and Jubilee are exceptions} consequently the backlash is a rapidly rising impedance in proportion to the attenuation of the horn. The two-way design of the the CF-3 {I thought the CF4 was one of Klipsch's better designs... Roy Delgado} will not incur as steep a penalty secondary to the efficiency not being near as high as the Heritage series.
The Mind has No Firewall~ U.S. Army War College.
Thank you very much for the reply. As you can see I am trying to decide if I should try SET with these speakers(I realize the Decware and Wright Audio El34's are a bit different). They are quite reasonably priced and I am intrigued by the SETs. If I found I need more power I am interested in A push-pull or the Rogue Sphinx which I have read good reports about and there is a dealer near me for audition(which would be helpful).
Thanks Bob
The chief factor now would be how large your room is. How loud you play is, of course another major factor. P/P IN class A can sound excellent. Triode wired 6L6 is an excellent alternative.
The Mind has No Firewall~ U.S. Army War College.
My room is approx 12'x 17', and I do not listen real loud, but I do listen to some large orchestral. So I am concerned about SET handling the large orchestral and also having well defined tight bass. When I tried a older Yamaha main amp with a tube pre amp the bass was good (punch?), and the mids were ok. My speakers are very efficient that's why I thought SET
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