1979 JMP 2203 TONE

hi
i'm going to mod a bit my 1979 JMP 2203 in order to have a browner tone.
i just cutted the bright cap on pre amp vol. and snipped out the 470 pico cap on low channel's 470K grid res.
i also lowered the 10 K (cathode) to 4,7 K and bypassed it with a 1 micro cap. and added a 22 micro on v2's 820R cathode.
The amp is still brighter especially with the gain maxxed. (great gain but still harsh)
Any suggestion?
thank you
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bainzy what do you think?
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[Bainzy]

have you tried changing preamp tubes? Sylvania 12ax7's give a browner sound than a lot of modern types...

i have all mullard on it (not reissue, original ones from Blackbourne factory)
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