High value, high efficiency speakers for SET amps


Hi, Gang,
I know that some of what I want to discuss here has been dealt with in other threads, some of them quite old, but I wanted to see if any of you fine, knowledgable folks are willing to help update and consolidate some of this info in a more current thread.
I am currently running my new Audio Note Kit 1 300B SET amp with a pair of Reference 3A De Capo speakers. I think it's a fine pairing and I am really enjoying what the 300B SET experience brings to the table in terms of musicality and emotional connection.
Still the De Capo, while supposedly an easy load due to its crossover-less design (only 1 cap on the tweeter with the mid-woofer directly coupled to the amp), is "only" rated at 92 db efficient, and based on the most recent Canadian NRC specs, that rating may be optimistic.
So, I am toying with the idea of trying a pair of more efficient, deliberately SET-friendly speakers in my rig, something that might also play lower and with greater dynamic swing than the De Capo's. Note that the De Capo's have served me well and I am very fond of them, but I can't help but wonder if my lovely Kit 1 would shine even better coupled to a VERY easy to drive speaker.
Devore and Audio Note are obvious options - the O/96 looks really tasty. Unfortunately, both of those choices are out of my budget, which I'm thinking maxes out (for real) at around $1500. I am willing to consider used equipment.
Tekton Lore 2.0: This is the speaker that Eric Alexander of Tekton has recommended when we've spoken on the phone, based upon my medium-small listening room and amp. I've read the epic "Lore vs. Zu" thread elsewhere in this forum, and clearly Tekton has its enthusiastic fans here. What I wonder is whether the Lore 2.0 has the refinement of the De Capo in terms of resolution, sweet high end and imaging. Audiogon'er Mikirob has pointed me to the many rave reviews of Tekton's speakers and I'm definitely interested.
I've corresponded with the Sonist folks (who are super nice) but their really high-efficiency, nearly-full-range floor stander is out of my budget.
Then there's the "vintage" route, going after some used JBL's or other high-efficiency "classics" from the 80's (or '70's). I am not inclined to go in this direction, but mention it because it's been suggested to me.
And then there's Omega. I spoke to Louis some time ago and he recommended his 7XRS hemp cone model. But I know all the raps on single driver designs and I'm cautious, although I would like to hear from any of you who own or have owned Omega's.
I'm in no rush to make a switch but I am very interested in your thoughts. Thanks, folks!
rebbi
Having done some investigation into Tannoy at various times over the years, I think it is safe to say that it is a fairly diverse line with products that may appeal to a wide variety of users and various models will work differently with most any amp including SET. So specific model will definitely matter a lot.
WaveTouch Grand Tetons are a no-brainer if you can find a pair in your price range. You could contact Alex at Wavetouch as he may have some older or B-stock GT's. From my experience with them I would say they will pretty much best the DeCapos in every sonic parameter. They are 94 dB/watt efficient and I drive mine to decent levels with a pair of 300B mono amps in an 11' x 14' room. Bass is strong down to about 40Hz. Alex gives a pretty long in-home trial, as well.
Forgot to mention that the Wavetouch Grand Tetons replaced a pair of the Tekton Lore-S speakers in my Small-Room Reference system.
Hi Rebbi, The speaker brand that I recommend is Sonist.
I had a pair of De Capo's that I was driving with a 5 watt amp (bridged Decware zens) and never felt that I had enough power for those speakers. Sold them and bought a pair of Sonist "Concerto 2's". The sound from them was a big step in the right direction! I think the De Capo's need about 25 or 30 watts to really shine, but the Sonist lit up with my 5 watts! I eventually found a used pair of the "Sonist Concerto 4's" and I'm done searching for a speaker to use with a few watts.
Tish
You should try to get to the Lone Star Audio Fest May 2nd in Dallas. That's where I heard Sonist and if they weren't out of my price range at the time I'd probably have a pair.

But at LSAF there are manufacturers of more than a few speakers, many full range single driver or similar designs.
Pi speakers is almost always there, Bob Brines, Manzanita, and others. I've seen many different types of speakers there, many SET compatible.
I suggest checking to see who will be there this year, I don't know.

And since you're a big DIY Guru now having built the Kit1 amp, don't discount building your own! ;)