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In Reply to: RE: High transconductance tubes sound as transistors... posted by Aldovan on March 28, 2014 at 17:44:07
Thomas
No, noy all tubes have the same linearity and quality.
I prefer the sound of the direct heated tubes.
A indirect heated tube never will sound with the same dfinition.
Or you prefer the sound of a 6L6 when compared to a 2A3 ?
Aldovan
Follow Ups:
Hi Aldo,
your thread title talks about high transconductance tubes sounding inferior to low transconductance tubes. And that simply is not true. The audio world is too full of such generalisations. If you can't get good sound of say, a D3a, WE437 or EC8020 you simply used them in the wrong way.
While I agree that better results can be obtained with DHTs, I think you are focussing too much on just the tube. I rate the importance of the circuit topology as higher than that of the choice of tube. A well implemented amp with an indirectly heated tube can easily outperform an average amp with a DHT. I have proven this many times with a 6CB5a amp, triode wired, against 300B amps.
Talking about the sound of a tube without giving the context how it was used, is completely meaningless
Best regards
Thomas
I think there are two things going on here.
First, the widely-admired DHTs (300B, 2A3, 45, 845) are in fact among the most linear triodes available (see my comments below about "linearity").
Second, I too have observed that in too many cases to ignore, there is a subjective "magic" (for want of a better word) to directly heated cathodes. Some directly heated pentodes and/or beam tetrodes are not very linear when triode wired but still sound better that those with indirectly-heated cathodes.
I can't claim to have heard a statistically-meaningful variety of such comparisons; I can't even claim to know how many that would be. So YMMV and all that. :^)
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