Bias amp or roll tubes?

Tubes Asylum

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Advice from those in the know will be greatly appreciated.
My system, driven by a set of tubed monos, is playing at noticeably lower volumes and sounds weaker, less crisp. Not sure if I need to replace some tubes or bias the amps. It would be a first time for me to do either.
Each amp has a complement of 6SN7 (x2), KT-88 (x2) and 5AR4WGB (x1). I have roughly 1000 hours on them. If I need to replace tubes, should I replace all of them? If I need to bias the amp any recommendations on a meter to use?
Thanks.

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Topic - Bias amp or roll tubes? - Zero 08:17:00 11/10/02 (2)

Re: Bias amp or roll tubes? - JJ Analog 21:16:59 11/10/02 (1)

Roger Wilco. Thanks. -nt- - Zero 09:14:09 11/11/02 (0)

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