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6550 tube vs KT88

Was wondering what might be some of the differences between these 2 tubes. I've heard 2 sets of 88's and was not a tube that fits my music, classical. i found the sound too compressed, too flat on fq's, dynamics were thin. Too warm, not detailed like the KT90 tube.
Is the 6550 a middle of the road between the 2?
Hows the timber? bass/mids/high separation?
The KT88 seems to blend the 3 too much.
bartokfan
tvad
9,467 posts
 
I'm also not sure that your amp, apparently designed to use KT90's, is really a good candidate for KT88's as drop-ins.
Zaikesman (Reviews | Threads | Answers)
Zaikesman makes a cogent point that amplifiers are usually voiced with a particular tube, regardless of their ability to function with several types of tubes.
11-01-00: Rcprince
I'd suggest you ask the manufacturer of the amps directly. The new Jadis have transformers optimized for the KT90s...
Therefore, it's likely an amp sounds best with a particular tube from a specific manufacturer (in the case of Jadis, the Ei Yugo KT90), and one cannot make generalizations about the quality or suitability of other tube types based only on one's limited experience with one amplifier that has been specifically designed for a particular tube. In fact, the JOR will probably sound different with Electro Harmonix KT90 than it does with Ei Yugo KT90.
audiofeil
4,011 posts
 
Couldn't resist huh Tvad?
:-)))))
tvad
9,467 posts
 
Couldn't resist huh Tvad?
:-)))))
Audiofeil (Threads | Answers)
Perceptive posts deserve attention, and Zaikesman's post was right on point.

OK, no more questions, your honor. :)
audiofeil
4,011 posts
 
I was yanking your chain. I sensed a little frustration earlier. Yeah, Zaikes had it right.
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