#1
love the crunch from my jcm 900 2x12 combo but its a bit on the trebley side. just got the amp and wondering what would be a good valve/tube upgrade bearing in mind this amp has 5881s. im aware there is different 6l6/5881 valves out there. i currently use a weber mass 100 attenuator, keep the gain low (6/20) on channel B and have the master volume about 9/10 and it sounds nice and fat with the power tube breakup. bit trebley tho...would changing the capacitor also help? dont know much about that. any help appreciated.
#2
You could try JJs, their tubes tend to be on the darker side.
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#3
You could try taking it to a tech and getting EL43 installed... i did that once, and loved it!
what model jcm 900 do u have? i now have a MKIII high master volume and conectting the fx loops with 1 cable really helps bring some character to the amp! try it!
#4
i have 4102 100 watt 2x12 dual reverb combo. what difference would upgrading the capacitor do? should i run it through a closed back 2x12 cab to get better low end? i like how its voiced except for the treblieness, would installing el34s not change the voicing?....so many questions.....
#5
Stick JJ's everywhere. Even with JJ's it will still be a bit fizzy because most of the distortion (and most of the work) in the preamp is done with SS crap - unless it's an SL/X, then only the master volumes and FX loop is SS. Still, regardless of model - JJ everywhere.
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