meiklejohn Posted August 12, 2014 Report Share Posted August 12, 2014 Hey, so I bought a jcm900 last week, although I don't really like it... until I can swap it or sell it I'm gonna have to make it work so...When I played the first time with it I noticed it was quite quiet, it's a 100watt head so it certainly shouldn't be quiet so I'm putting it all down to tubes needing changed? Here's my questions;Do I need to change all the tubes at once or just the bad one(s)? Do I have to buy the exact same tubes that are in it now?Bias... Don't know what it is but will I need to get it done?Any info you lot can give me would be appreciated. Complicated shit!Thanks Quote Link to comment Share on other sites More sharing options...
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