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In Reply to: RE: Audio Research LS-27 preamp tube replacement posted by audioman on February 25, 2017 at 15:38:53
Generally when the dealer recommends you change the tube that soon it's because they are driving that tube hard.
If you can find a more rugged 6H30 that may help. My advice is contact Jim McShane over at the tube forum. He's the tube man. If there is an answer most likely Jim has it.
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Thank you very much to all who contributed to this thread. I always sincerely appreciate the advice and suggestions based on your personal experience, there is audio-safety in numbers :> )
I have many years in audio, but have never ( until now ) owned an ARC product and just really did not know what to expect in terms of design . All I can tell you though is that I really like the sound of this preamp. It is a little more subtle / laid back than others I have tried, but I am using a speaker that is quite lively with an AMT tweeter and the LS-27 seems to work quite well with it even if the ARC might be accused of being a little " soft " in overall terms, at least it is very musical to my ears anyway.
I will just pick up a new pair of tubes to have on hand and maybe try swapping the old ones out and see if there are any positive changes. If so, I'll leave them in, if not, I'll just put the originals back in and be content with the sound !
Content? Is there such a thing in this hobby ? LOL
thanks again brothers....
I know others will argue but sometimes small tubes do fade out slowly. A few months ago I would have been one of those arguing just that point, until it happened to me! I think hard driving tubes just start getting noisy. But some of them can start loosing their "zip".
It can't hurt to try a fresh set. If nothing else comes of it than at least you have a spare set sitting around.
I found in my preamp when I used EH 6922s they would dull out and then go noisy in a few months. I switched to Gold Lion 6922s and they seem to be going strong, and zippy, for three times the life I had with the EH tubes.
I would still contact Jim. Knows his tubes, his stereos and as honest as they get.
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