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Best KT88s (specifically for VAC Auricle Musiblocs)

I'm using a KT88 based amp for the first time - the VAC Auricle Musicblocs. I just had them serviced but one of the cheap Svetlanas blew, probably from my biasing it too high, and its been replaced by a used Genalex Gold Lion for the moment. The amps sound very good as it is, but I'd like to get the best out of them with a good matched Quad of something decent.

Ideally I would like a little more mid-range luxury and presence without sacrificing too much bass control. However lower bass is not so much of an issue because my speakers have powered subs with an active crossover (Vaughan Cabernet One).

I'm in the UK, and valve selection here is a bit limited. Nobody seems to have Svetlana Winged Cs anymore, and I've read reports of dubious quality in the later batches. Genelex Gold Lion are easy to get from good dealers who can match and measure, so that is the obvious choice. But would I be better of with some Chinese valves such as the Shuguang KT88-98? Are they going to be a bit warmer in sound to the Genelex?

I've read great reports about the Psvane KT88 T2 but they are very expensive. Also the Shuguang Treasures. The riskiest option is to buy these from Mable Audio in China, who have them up for a good price:

http://www.mableaudio.com/en/

From what I have read Kevin Hayes supplied the Auricles with the Shuguang KT88-98. These are very affordable, but I suspect that Kevin only supplies selected ones. 

I could also buy from the US, and I'd appreciate any recommendations for the best source.


andreweast

Showing 1 response by bradf

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bradf
324 posts
 
This doesn't really answer your question regarding best KT 88, but I thought you may find some interest in it. I too am considering replacement of power tubes in both my Ars Sonus Filarmonia, and Primaluna P5.
I have been researching Psvane EL34, and KT 120 (including Black treasures)
I have a spare set of JJ E34L quad for my Filarmonia that I substituted for the Gold Lion KT88 in My Primaluna 5.
A truly unbelievable improvement. It is the most difference / improvement I have ever experienced in a power tube and I have tried a number Including the GL KT 77 and NOS GE 6550. I am pretty surprised how well this $14.00 US dollar sounds. You may give it a try. There available at The Tube Depot in quads and for a couple bucks a piece you can get them burned-in. Just want to clarify that these are the E34L's and not the EL34's. Also came across a couple of vendors selling NOS Siemens EL34 https://www.tubedepot.com/products/rft-made-siemens-el34
http://www.tubeaudiostore.com/elpremgrad.html.
http://www.nosvacuumtubes.net/product-category/power-tubes/power-tubes-6550/
The above 3 links/stores have several type of NOS power tubes, including NOS Mullard EL34 (expensive) and Amperex EL34, and others
You may find the new production Telefunkene Black Diamond EL34 tubes of interest. In addition to EL34's they are also producing 6550's and KT88's.
With the exception of the JJ E34L tube, I can't help you regarding the sound of the above referenced NOS tubes, that's something I am trying to gather info on.
Any one reading this, who has tried any of the above NOS tubes or the new production Telefunkene Black Diamond tubes your input would be helpful. 
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