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1  British Style / JCM 800 2203, 2204, 2550, 2555 / 2550 - very weak clean channel on: October 14, 2014, 12:10:16 PM
hi guys,

I bought a used 2550 recently, which sounds awesome btw but the clean channel is very low output compared to the dirty channel - in fact the whole amp is not as loud as I thought it would be.  Does anyone have any idea what may be the problem?  Could it be a pre-amp valve/ tube?

2  British Style / JCM 800 2203, 2204, 2550, 2555 / Potential 2550 owner on: January 17, 2014, 02:11:18 AM
Hi guys,

I am just about to pull the plug on a used Nik-built 2550 and just wondered a few things:

1.   I already have a JCM900 with the diode clipping - Is this amp a straight through Valve amp with the option to add diode clipping with the switch?

2.   How heavy can the distorted sound go? - I am a classic rocker but just wondered.

3.   How easy is it to bias? I know it has test points on the back but is it justa  case of testing it and adjusting the bias pot? (I have biased my other amps successfully)

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