Do matched quads become "unmatched" when they age?

Tubes Asylum

Questions about tubes and gear that glows. FAQ

Most Audio Research power amps use "close to exact" matched quad tube sets biased as a group. When the tubes age over time do the individual tubes loose there "match" and then result in a drop in performance and increased distortion? Is this method a disadvantage over individually biased tubes in other brands of amps?

Edits: 07/17/09

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Topic - Do matched quads become "unmatched" when they age? - DonC 09:38:59 07/17/09 (6)

Aging of our tubes and..... - DanWKW 12:25:13 07/18/09 (0)

RE: Do matched quads become "unmatched" when they age? - Ron Oehlert 21:25:46 07/17/09 (0)

RE: Do matched quads become "unmatched" when they age? - FenderLover 17:57:29 07/17/09 (0)

I thought most of the drift would happen in the first few hours - Paully 17:07:41 07/17/09 (0)

RE: Do matched quads become "unmatched" when they age? - JSTRM 14:11:15 07/17/09 (1)

RE: Do matched quads become "unmatched" when they age? - gearhunter 17:04:29 07/17/09 (0)

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