The Quest for The KEF… Reference 107!

I am at the same point as you, I have plenty of great gear that more than does justice to the music. Time to trim the stuff that is not hooked up and needed.

If you do get around to an upgrade, there is a big difference between the electret and true electrostatics. The former give you the Stax sonic signature, the latter should run with your Quads depending on the model.
 
I am at the same point as you, I have plenty of great gear that more than does justice to the music. Time to trim the stuff that is not hooked up and needed.

If you do get around to an upgrade, there is a big difference between the electret and true electrostatics. The former give you the Stax sonic signature, the latter should run with your Quads depending on the model.

Thanks, I figured that would be the case, with the true electrostatics being much better. The "electret" models I still feel are "good for the money" but no, they do not keep up with the Quads! Definitely on my "list" to try the true Stax electrostatics.
 
Anybody interested in the speakers in my avatar? R107/2 rosewood with kube, maybe all 8 flr spikes maybe not. they're listed on audio mart. tks
 
Anybody interested in the speakers in my avatar? R107/2 rosewood with kube, maybe all 8 flr spikes maybe not. they're listed on audio mart. tks

I don't think this is allowed...but I couldn't find them listed either. PM me with asking price. Are they restored or "original?"
 
Last Friday added Townshend Maximum super tweeters to my 107's. They operate from 12k - 90 khz, greatly extending the 107's, which go to 20 khz. The results are...not what I expected...but I'm not sure what to think yet. Had a few hours' listening. I hooked them up and set the level to 3 then 4. Didn't hear any change (there are levels "off" through "max" with 5 steps in between). I then turned them off...didn't notice any obvious difference either. Don't think I was listening for the right thing though. I was expecting lots of extra treble energy, similar to some Apogee ribbons I used to own. These don't do that. There is a little extra metallic shimmer to cymbals, for sure...just a little. The difference I THINK I am hearing is the whole speaker just has a little more realism, more PRAT...just a nice ease to it...it was already a speaker with a commanding "ease" to the sound if that makes sense. Like it COULD kick your ass but it's just going to be confident in the fact that it can if it wants to, lol...but it's just going to cruise along and do what it's supposed to do, knowing it can do whatever is called upon of it (yes I'm weirdly personifying the speakers). But these supertweeters seem to add just a little more of that ease to the sound and also a little more realism to it all.

I wasn't sure they were doing ANYTHING at all. I can't hear them. But then I turned the right one off and left the left one on...felt a pull to the left...the left definitely sounded different. Then did the same to the right...I didn't hear it the other way at first, but I don't think my hearing is all there on the right ear. Tried it again and this time felt the "pull" to the right. So they are doing "something." I turn them off and still think the speakers sound good...but just not QUITE as good...maybe 5-10% less good, if that.

I tried changing phase on the supertweeters and also moving them forward or backward, couldn't perceive any change.

Definitely more trial and error and critical listening needed. So far I THINK they are keepers but not 100% sure yet. They ARE quite expensive. I have a 14 day trial but not sure I'll be able to decide in that time so likely will just keep them and eventually sell them if I'm not convinced. Like any component - amp, preamp, cartridge, cables - the changes can be subtler than we expect and we may not definitively hear them at all until our ears adjust. This is also in that camp where the effect doesn't kick you in the chest, which I guess at this level is a good thing...we're not trying to alter or color the sound, just let it through.

Below is the review that led me to purchase them (from a review on Analogue Seduction). I was in the same boat as James, 107's restored, enjoying them, but thought I'd try for more. I will say, the speakers are sounding very good, probably better than ever, SOMEHOW!

Towhshend Maximum Super Tweeters
Wednesday, 6 April 2016 | James
Well... I purchased these more to satisfy my curiosity after reading about how they could take a good system and add more clarity and coherence across the entire frequency spectrum. I have had them in my system for three days now and by golly, they really do work. As stated elsewhere, if you isolate them you can just barely hear something going on but it is hardly high in output or very recognizable as musical at least that I can detect anyway. However, add them back to your full-range speakers and it is a whole different story. I recently rebuilt my aging KEF R107 speakers that had ceased working due to completely disintegrated surrounds on all four woofers and tweeters with their voice coils stuck in 30 year old, dried up Ferro Fluid. With rebuild woofers and having disassembled, cleaned and recharged the tweeters, they were sounding very fine indeed so there was no compelling reason to fuss with them by adding super tweeters but boy, am I glad I did! These are still one of the best sounding speakers I have ever heard but with the super tweeter added in, they are elevated to something truly special. The claims others have made are all accurate. The clarity, space and ease across the entire spectrum is not subtle. My wife who knows nothing about any of this when asked to take a listed after I had installed them commented that the system sounded better than ever and proceeded to pretty much describe the improvements in similar terms. Keep in mind she had no idea the tweeters had been added and so was in no way biased. That is a pretty strong commendation in my book. Anyway, these things are really something special and you don't need to have perfect hearing to appreciate the improvements. I am testament to that because my hearing is hardly in pristine shape after all the years of playing in a rock band on the side off an on for the last 45 years. Highly recommended!
 
I run a pair of Vifa Dual Ring Radiator Super Tweeters off of the Dunlavy Center Channel speaker. It gives a bit more realism to voices when you can hear the spit exit the mouth of actors in the movies! :naughty:

Seriously, it is a very suptle thing Hawkeye, I get it! :thumbsup:

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
 
I run a pair of Vifa Dual Ring Radiator Super Tweeters off of the Dunlavy Center Channel speaker. It gives a bit more realism to voices when you can hear the spit exit the mouth of actors in the movies! :naughty:

Seriously, it is a very suptle thing Hawkeye, I get it! :thumbsup:

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

Dude, I was just coming here to post that yeah, I'm hearing it now...BOY am I hearing it! Realistic vocals is definitely what I'm hearing. I've never heard the 107's sound so good. It now almost sounds to me like it's kicked the entire speaker up a notch...gave them that little extra bit of magic that the Quads had that I felt the KEF's might be lacking. Well, they ain't lacking it now!
 
I contacted the seller and YES, they were still for sale. Seems he had them up on Craig’s for a month or so, but I guess many in Denver didn’t want to spend the money for them, didn’t have the space for them or didn’t know what they were. He did have an offer of $400 for the Kube, but I urged him that under no certain terms, should he separate the Kube from the Speakers.

They are MATCHED for crying out loud and selling off the Kube is like separating sibling twins! I knew right then and there that I had to save these speakers from spiraling into the abyss of separation or heaven forbid, being bought by a death metal head banger.

is this true? has anyone listen to a pair without the KUBE? i have a chance on purchasing a pair without the kube .....
 
is this true? has anyone listen to a pair without the KUBE? i have a chance on purchasing a pair without the kube .....

I listened to mine without a Kube until I had a power supply built. The 107 does have a drastic change without the Kube, but I still enjoyed listening to them without it. Hopefully the price for the pair you are looking at has a discount. Good luck!
 
I listened to mine without a Kube until I had a power supply built. The 107 does have a drastic change without the Kube, but I still enjoyed listening to them without it. Hopefully the price for the pair you are looking at has a discount. Good luck!

is your KUBE the one that came original with the speakers or was it from a different pair?

I noticed you are using a ST-70 tube amp , is it enough power to run the 107s?
 
The kube was original, but the power supply was lost.

The ST70 has no trouble powering the 107's at all, I can't even approach 50% volume without getting to ear bleeding and house shaking levels. I plan on trying my Luxman R-117 on them soon to try some high powered solid state.
 
so is it true that the KUBE is matched to each inividual pair of speakers? I ask becasue I could eventually buy a KUBE on ebay but ofcourse it wouldn´t be the original
 
so is it true that the KUBE is matched to each inividual pair of speakers? I ask becasue I could eventually buy a KUBE on ebay but ofcourse it wouldn´t be the original

Yes and no...

Practically, I don't think it matters, as long as you get a "107" KUBE (from ANY pair of 107's).

KEF did a "driver matching" thing and also I think tested the speakers with THEIR individual KUBE...but I don't think any KUBE was "tailored" to any particular set of speakers, if that makes sense. All 107 KUBE's were made the same, just "tested" and therefore "matched" with the speakers they were made with/for. If you did have the matching one, it might increase the value of the speakers a bit, but probably not a whole lot. The 107's hold their value reasonably well anyway (yet short of speakers like JBL L300's and Altec 19's, for some reason...haven't figured that one out yet, I thought those three speakers were all basically in the same league).

This is what I've heard, anyway. I'm definitely not the expert here, just a 107 enthusiast/owner.

Since you were talking amps above, I'd love to try 107's with a tube amp, but for me, solid state is more practical, and so far I've preferred Class A solid state. The McCormack amps are an excellent match, I can attest to that. I'm sure I'd enjoy other Class A amps as well, like Pass Labs, Monarchy, etc.
 
The Kef's like current! I'm still using mine in my living room, they sound excellent and I don't need a sub with them! I've had a few Bass kings in my basement including Revel salon 1 and salon 2. If anybody reads the glowing reviews of these speakers I can say in my basement listening room the Kef's top vented woofer system went deeper louder than the salon2 in that room! I was kinda surprised. No modern gear has tape loops so I keep a slave amp, a B&K 4420 to drive the kube and woofers with my int's main outs and use the int to drive the top end so it is possible the b&k may have more gain so sound louder, but I know it's because the top loading the speakers avoid the bass null the bottom ported speakers struggle with, Now when it comes to the rest of the audible spectrum, some of these new products are worth listening to.
 
Yeah, I run mine on SS... I've used McCormack DNA1 and Classe Fifteen. Just purchased a Pass Labs X3 (basically an X150) to drive the R107's. We'll see how that goes and I'll report back.
 
McCarty was asking about T33 tweeter's (replacements) over on the Registry Thread. The SP1210 is technically the T33-B. The specification sheet (Thiele-Small Parameters) is attached. And there was a thread discussing alternatives here.

The Midwest MT-1191 might work since it looks like it has the face bolt pattern to attach to the SP1210 face plate. I'm not sure if this is a Vifa BC25TG15-04 rebranding or not. Madisound has a version as well.

Anyway Fs & Qts are a touch lower, but pretty damn close. Fs/Qts is 1342 vs 1376 for the T33.

Anyone try out the Vifa's? For $15, I might give one a go! And there is the Audax TW025A2, but much more expensive.
 

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  • KEF-T33-B-SP1210.pdf
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  • BC25TG15-04.pdf
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It looks like the mounting is just a touch off. I measure 60mm on center for the T33 bolt pattern and the Vifa measures 56mm. But +-2mm, so not sure.

upload_2020-4-20_12-17-1.png
 
Running the KEF's now on the Pass Labs X3 and it was a good step up from the Classe Fifteen! A little more dynamic with more air around the mids. :)
Could be the Class A operation up to 35W that is helping. But man, that X3 runs hot! Combined with the VAC Tubes for my mains, I have the space heater thing going on now! :(
 
On another note... I just purchased a Anthem AVM 60 with ARC... I now realize the value of having an SPL measurement Platform. Found this for my Surrounds... looks like it's time for a rebuild of the T33. Hope it's OK!

Left_KEF_ARC.jpg Right_KEF_ARC.jpg
 
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