Re: Turning down to 0 with 300k pots with JB in LP std
I don't have experience with the JCM600, but I can certainly imagine a lot of situations where I'd be turning down the tone when soloing on the bridge pickup, JB or otherwise, so I wouldn't automatically suspect that there's anything wrong, per se.
Of course, I'd probably be more likley to just switch to the neck pickup, since that tends to be the LP solo sound that I think of when I thnk of LP solos.