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Is bias setting necessary on matched tubes?

Hi Guys,

Just bought my first tube amp and it was delivered with broken/defective tubes. I just bought a matched quad of Genalex KT88's to replace them and was wondering if biasing is a must, or can I just "plug and play" them as they say.

I'm pretty much a newbie with tubes so any advice is really helpful.

Thanks!

Geoff
geoffcin

Showing 1 response by dusty

dusty
60 posts
 
Unless your amp is of the "audobias" type (primaluna is one brand) then you will have to readjust the bias. Matched tubes just means that they are very similair in terms of operating characteristics. Important! If your amp has only one bias adjustment for each channel then it's recommended that you ONLY buy matched tube sets and replace them all when one goes bad. RAM tubes website has a good primer on matched tubes.
Cheers!
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