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

Newbee, can you comment on the sonic differences between a SED 6550 and Reissued Tung-Sol 6550? ... which one has less smear when dealing with complex passages and poorly recorded compress music.

Thanks!

Bit out of topic.

I never tried SED valves, but in my PL Plologue Two, KT88 gives more body, like Newbee wrote, and I think this is what you may expect, generally speaking.
Personally, I compared NOS 6550 Tung Sols grey plates with holes, NOS 6550 Tung Sols Black smooth plates, NOS 6550 Sylvania and NOS GEC KT88, which I am using now. NOS 6550 Tung Sols Black smooth plated are great, but not as much as KT88, however may depend in which amp, or simply putted set up, you are using them.
The bad thing, as always with NOS, they are very expensive, but from what I heard/read, TungSols, even they are below their minimum, still sound wonderfull, talking about Black smooth plated from 50's, but they dont have that magic of GEC, I would say KT88 are more involving/musical as well, at least to my ears.

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.