It's not necessarily, qualitatively "better" to my ears at this point, but it sure isn't worse. One thing is for sure, there is LESS hum now, clearer bass, and more articulate top end present than before. Not sure JMP is the best way to describe it, but I'm tired and that's the first thing that comes to my gut instinct.Īnyway, I'll give it a go and let the caps break in some more before giving a final judgement. To sum up the Green Channel tone change post-choke-and-Sozos, it's like the amp went from Green Day to "It's a Long Way to the Top if (You Wanna Rock and Roll)", as the Green Channel seems to magically want to sit, tonally, in that mid-'70s, scooped, (JMP?) tone range. Odd, as I preferred the Green Channel by far before the mods. Very interesting.I'm not yet sold on the Green Channel after the swap, but oddly enough, the Red Channel has been improved. After installing a 3hy choke (Classic Tone) and replacing the major coupling caps with Sozo NextGen caps, the amp went way toward the vintage realm. Interesting difference, though.with the "stock" setup, the amp was more modern sounding, versatile, even-keeled. Well heck, it fired up and worked without incident!!!!
Would one of you be willing to take a look at the JCM 2000 DSL 50 schematics out there and let me know what caps you'd suggest swapping with Sozos? It'd be much appreciated. Maybe a cathode cap or two as well? I'm not too up on the gainier side of that circuit and have not used Sozo's in high-gain circuits, so I'm open to suggestions/input. 022uf coupling caps in between preamp stages as well as after the phase inverter. 022uf caps in the tone stack seem like obvious ones, as well as the. So, I'm looking for help in choosing which coupling caps in the JCM 2000 DSL 50 I should replace for most bang-for-the-buck improvement in tone and feel. However, I'd like to make this amp the best it can be within reason, and have used Sozo caps in past builds with great success, observing they provide a very clear, clean, "right" sound. I removed the reverb and that took care of that issue.amp is quiet and feels pretty good. It's yet to display the runaway bias drift issue, and other than having a noisy reverb circuit it sounds pretty good, especially with NOS Mullard, Telefunken, and RCA preamp tubes. I came across a great deal on an older Marshall JCM 2000 DSL 50 head and am trying to make the best of it. I posted this over on the Amp Garage forum but have received no responses, so I'm re-posting this here for some added help.
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