Sound of SED Winged C KT88 vs. SED Winged C 6550's

Getting information out of Upscale Audio isn't as easy as it used to be.

There are some major differences between a KT88 and a 6550 and I have always heard a big difference.

I recommend you try Roger Modjeski at Ram Labs for tubes. It's a much better experience.

I switched from EH6550 to GL Reissued KT88 several years ago and the GL is SUPERIOR in every way. Surprisely GL is warmer but also much higher resolution.

My amps require 4MQ so NOS is out of the question. Looking for a tube with the sound of GL Reissued KT88 but higher resolution. Willing to give up a touch of body and bloom ... I DON'T want a SS sound. I'm satisfy with GL but like to experiment ... a bonus with tubes.

I try not dealing with Upscale any longer. ~A years ago I emailed Upscale, Goodwin High End and Audiowave on a EquiTech 2Q. Only Alan @Audiowave replied and ended up purchasing 2 new units from him. Thank GOD for the internet ... have found many great dealers.

Knghifi, I doubt that you will find what you are seeking with the re-issue Tong-sols. Compared to the SED 6550's their bass is bigger, yet tight, mid-range a tad warm, and highs natural. The SED's are more linear and in the wrong amp they can sound clinical (just as the Tong-sols in the wrong amp can sound a bit too warm). I've never heard the GL reissues but from what I've read I would assume they are similar to the SED 6550's with a bit more warmth and extended highs, but that is a WAG.

FWIW, when I'm seeking greater clarity I more often than not go to the small tubes and find success.

Hope that helps a bit.

This is from "the tubestore" Gold Lion KT-88
"In 1957 Marconi-Osram Valve Co. (Genalex) introduced the "King of Power Tubes", the legendary Gold Lion KT88. This tube became the heart and soul of such classics as the Dynaco Mark III, McIntosh MC275, and Marshall Major. Unfortunately, Genalex ceased tube production in the early 1980s and the Genalex Gold Lion KT88 has become very expensive and hard to find."

"After extensive research and engineering, New Sensor Corp. has reissued the famed Genalex Gold Lion KT88. This tube has been recreated down to the finest detail with gold plated grid wire, carbonized screen grids, and a tri-alloy clad plate structure for exceptional performance and sound quality."

I used these in my Quicksilver V-4's and loved them. Worth checking out!!

I think sounds best with KT-88's rather than 6550's and the best new production KT-88 is the Gold Lion re-issue.