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 I just had them serviced but one of the cheap Svetlanas blew, probably from my biasing it too high, and its been replaced by a used Genalex Gold Lion for the moment.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 6 responses by maxmad

You are in UK and saying that there are any good KT88 tubes? How about UK made NOS GEC KT88? If you like to buy best out there, dont look further. I have tried those Chinese made, so called great, tubes and nothing come close. I dont have your amp either and sold my KT88 a while back, but I would save some cash and forget the rest, but thats me.
I tried 50 yrs Ann BT 300B ones in my Cary CAD 300B SEI and nothing good I can say about these tubes, not by their look, how they feel, their build and especially their sound. Sure, tubes do sound differ in differ amps and maybe it was simply mismatch, but same was with Sophia, so called Mesh and Royals, which were much better, but for the money they selling them, no way. To make a good KT88 is not that simple plus material they use, lowest quality you can find. Like Dr. R. Kron said onse, we make 500 tubes a month and in China they make that in 1 hour, so, go figure.
ure.

Yes, these are not cheap, agree, but if you look, you may find them for a good price, check vintage radio shops in UK and you may be surprised, or, here is the link for the seller I bought some tubes in the past, ask for the price, if you like

In my opinion, KT88 is much better tube than EL34 and I simply dont understand why people buy USD 5000-10000 amps and put shity tubes in it, all beyond me. From many things I learn in this hobby there is one simple, bigger bottle>bigger sound, I compared KT88 to EL34 and 6550 and they eat both tubes for breakfast and I had most wanted Philips EL34, NOS Tesla EL34 and Tung Sols 6550 smoth plates and GEC KT88 won just like that. For me, stepping from KT88 to EL34 is stepping down, only to 300B would be my choice and thats what I did, but thats another story.

My amp was Prima Luna Prologue Two, which is KT88, but can use EL34, 6550 and I believe some more of KT series, but I havent tried any than above. Dont get me wrong, I liked EL34 and if you deside to switch, try NOS Tesla.

Also, I tried Unison Research S2 ones and it was clear not my thing, however, they guy who sold me Tannoys advised to check S8 model, but I havent try it yet.  

I drive my Tannoy’s D700 by Cary 300B ( classic chrome body with 11 w p.ch. or something ) and the match is very good, they are 93dB, think that mono’s will be better, but it is good for now. I also tried Zanden 7000 300B ones, which is 8 w p.ch. only, and the sound was superb, as it is all about transformers.

I wish I had the money to get Tom Evans pre and power amps, maybe one day.