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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Newbie question : 6550 vs. KT88 vs. KT90 posted by Ignace on October 4, 1999 at 15:14:30:
The KT90 takes about 300 hrs to settle in. They have been superior in every amp except
1. A guy with a Jolida 502A...but he only let them play maybe 8 hrs at most. Every other customer has felt they were a huge upgrade. And we've re-tubed hundreds of amps with them.2. Music Reference RM-9, in which that customer felt it sounded best with EL-34's...and that well may be the case with that amp, so we suggest staying with EL34.
But it should be noted from this e-mail received recently on the Music Reference RM200:
> Kevin: I received the KT-90s yesterday. This tube stash should last
> me quite a while. These really are the best sounding KT-88/6550 style
> tube. They work wonders in my Music Reference RM-200. Compared to the
> Svetlana 6550, the KT-90's bass is tighter and better defined.
> Compared to the JJ/Teslovak KT-88, the KT-90's highs are smoother and
> better integrated with the rest of the frequency spectrum. At first,
> the KT-90s were rather lean and bright; but after breaking them in for
> what seemed like forever (probably 250 to 300 hours of playing time),
> they have filled out considerably with low end weight and body. The
> highs are still extended but much smoother. They sound appreciably
> more powerful than either the 6550 or KT-88, with tremendous "slam" on
> full orchestral or rock music, while retaining the finesse that tubes
> are known for.In the KT88 world...there isn't much. Tesla, Sovtek, and various Chinese.
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Follow Ups
- KT90 have a long break in...more - Kevin Deal 06:33:39 10/05/99 (1)
- More too it than that - GEO 07:13:21 10/05/99 (0)
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