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GEC KT88 single-getter vs. triple-getter tubes

I recently received a Unison Research Sinfonia integrated amplifier and tried various tubes with it. As output tubes, I tried three-getter GEC KT-88 tubes which are great but I felt that they are overblown and rather fat sounding and lack air and HF extension. The stock tubes (Sovtek KT-88 marked "Unison Research") and somewhat lighter and brighter in a good sense and I thought I would keep them as output tubes, until I inserted the earlier vintage single-getter Genalex KT-88 tubes, which have more high frequency extension and transparency and don't have such excessive "bloom" I was suffering from. Has anyone had similar experience with these two varieties of GEC tubes? I will also appreciate any tips about a reliable source of NOS/NIB GEC/Genalex KT-88 tubes.
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Showing 1 response by jtaysk0c62

jtaysk0c62
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It's really hard to find these tubes now except on ebay. All tubevendors no longer have any of this stash.

I have a set which i cherish over the last 10 years...they lasts and lasts.

IMHO, these are undoubtedly the most natural organic sounding tubes that will give you that analogue or "LP" flavour sound.

I have tried Tungsols(NOS), Ei, Svets KT88 and 6550, GEKT88, GE 6550. GEC has proved the most reliable and lasting tube that i have tried to date. I have lost too many Tungsols and current tubes which just had heartstopping failure in my Conrads over these years.

There does not seem to be that difference as i had some single getters. Have you havd your tubes tested as the difference seems to be typical of wornout tubes.
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