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
Rob,
The Yamamoto DAC is relatively a rare find in the used marketplace. If you can get one for only 1K that is a true steal!(believe me). Given your taste and experience I think you'll really enjoy it. It definitely is geared towards the "music lover" crowd. I'm sure you know what I mean.
Charles,
I agree Rebbi that you should "stay put" unless given the opportunity to listen to another speaker without financial committment. All I can say is that the longer I live with the DeCapos the more I enjoy them. They are a VERY refined musically involving monitor. All this talk about how well the DeCapo and Kit 1 work together makes me want to challenge my suspicions, primarily that the Kit doesn't have enough gas for large scale dynamic music. I would like to be wrong. It's hard to overlook the enthusiasm of users of low powered SET amps and these speakers.
Charles,
Good question. To be honest, no, there's nothing I miss about the Manley Mahis. At least with my associated equipment, I feel that the Kit 1 betters the Manley's in every way. The Kit 1 is much quieter – it is dead silent even if I turn the volume control all the way up to maximum. Instrumental tone and timbre is miles ahead. (As I mentioned in an earlier post, I was listening to a Joni Mitchell Greatest Hits CD last week and the sound of her voice and the tone of some of the acoustic guitar work was startlingly real.)
As the amp continues to settle in, I have found that low-end response is, surprisingly, at least as good as my old push-pull gear, maybe even a little better. On "Another World," from Joe Jackson's "Night and Day" LP, the big kettle drum whacks have a body to them that I never heard before. Similarly, a few nights ago I was listening to one of my favorite songs from Paul Simon's "So Beautiful or So What" CD. The track "Rewrite," features all sorts of exotic string instruments and percussion, including hits on some kind of very deep sounding talking drum. The energy and authority on those drum hits completely took me by surprise. I think I must have been grinning!
The Kit 1 also has that wonderful ability to present the music as an organic whole, while still giving each component of the music is due without smearing. So, well recorded background vocals sound clean and pure and you can appreciate them both as a unified, harmonic entity while at the same time hearing each voice as its own musical element.
I will give you all one further example.
I own a single Diana Krall CD. I'm not a big fan of hers (no offense to those of you who are) but I bought her CD "When I Look in Your Eyes" a few years ago because I knew that she is an audiophile favorite and wanted to see what the fuss was about.
I can certainly understand why the audiophile crowd loves her. Apart from the quality of the performances (say what you will) the sonics are immaculate.
Anyway, on the opening cut of that CD, "Let's Face the Music and Dance," there is some beautiful (schmaltzy) orchestration that always sounded very pretty on my old amplifiers. But when I listened to that track last night for the very first time on the Kit 1, I was astounded by the presentation. Startlingly, the background went from sounding like "orchestration" to sounding like An Orchestra playing in an auditorium behind the speakers. Now, remember, I have a small, cluttered and fairly acoustically compromised listening room, but I NEVER thought I'd hear music like this in my own home.
So, yeah, you could say I'm happy. ;-)
Brownsfan,
It's funny that you chime in that this point, because I was thinking the other day that there is some kind of real synergy between the De Capo and 300 B SET amplification. It now makes sense to me that Tash Goka, the head of Reference 3A, recommends one of the Antique Sound Labs 300 B SET amps (which he imports) as a great match with the De Capo. And now, yes, I am remembering that, a long time ago, you said in your comparison that the Coincident Frankenstein sounded pretty great with the De Capo.
Obviously, I cannot compare the the Kit 1 to the Frankenstein 300 B. What I can say is that, while the Kit 1 isn't "cheap" by any means, in the world of high-end audio it's one heck of a great amp at a reasonable asking price. Heck, if you were averse to the do-it-yourself part, you could pay Digital Pete a few hundred dollars to build it for you.
Under those terms it would still be a fine value.
Mikirob,
I will be delighted to hear about your wife's experience building the Kit 1. I would certainly go for the best capacitors you can put in the amp – I do think they make a difference. I also recommend seeing if you can get one of these 274 B rectifier tubes from Brian. I did have a chance to compare it with the stock tube during the troubleshooting process and it is a better sounding tube in the amp.
As for me, I'm not rushing to replace the stock 300 B's that came with the kit. I understand that the Black Treasure tubes take quite a while to break in and I'm very happy with the sound I'm getting right now. I do think I'm going to get one of those relatively inexpensive Pangaea power cords from Audio Advisor one of these days.
I hope to build another Audio Note Kits one of these days. I'd like to do one of their phono preamp's or perhaps one of their DAC's.