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glenn hargrave

Marshall JMP-1 Tube MIDI Guitar Preamp



Sound Quality

Here we go. Channels Clean 1 and Clean2 sound good but not great. A little noisy at peak levels and abrupt at around 8. Still needs more than the pre-amp to finish the sound. Even a little color from an effects processor can make a huge difference. I can live with these 2 channels but there's much better for the outrageous price. OD1 and OD2 sound like crap! I hear no convincing valves tones worth mentioning, but rather sounds more like an overpriced fuzz box. Dirty distortion at the high frequency and gutless for a Marshall. Gain and volume from 7 and above are just full of unwanted noise. Bass shift helps and is quite good but the sound is already bad. I think it could be usefull in a studio for certain tones but certainly not onstage. Those giving such good reviews on this amp can buy mine real cheap!

Reliability/Durability

No problems yet although I've heard complaints about it losing buttons.

General Comments

I'm a recording engineer, musician (over 30 yrs), performer and an award winning songwriter. I use Marshall power amps Valvestate 80/80 and the Marshall 9100 Dual Mono, 4x12 1960a cab. Mesa, Marshall, Line 6, and various other amps and heads. The JMP-1 is just not competitive to other amp sounds when it comes to valve gain.




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