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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 ndeslions

ndeslions
79 posts
 
You could also try the Chinese GEKT88, they are head and shoulders above other current production KT88 tubes i tried in my system.
They also are very affordable.

I did not had the chance to test a GEC NOS yet.
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