Official original Marshall JVM appreciation thread

santiall said:
I was young and inexperienced, I liked pointy guitars with Floyd Rose bridges... hmmm, :unsure: pretty much the same as now, just not young...
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The 410 was finally the Marshall I had in my head and the only one that didn’t need to be insanely loud to sound right. Still the best value amp you can buy, particularly in the UK . £600 sh is common.
 
So JVM owners, how do you set up your amp? What mode/settings do you use for each channel and what sort of tone are you using them for?
 
laxu said:
So JVM owners, how do you set up your amp? What mode/settings do you use for each channel and what sort of tone are you using them for?
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spinal tap GIF by Comic-Con HQ

:sofa Sorry - thread's on page 11; it had to be done.
 
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2112 said:
Fractal OD-1 Orange vs Real Amp & X-Load. I just matched the knob settings and chose the appropriate impedance curve/speaker settings in the amp block and turned the amp block NFB down a touch. Stupid good.

View attachment 61412
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This is the real 410H vs Fractal "BRIT JVM OD1 ORANGE" model, right?
 
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Were there any changes between 2007 and now on the JVM410? Any issues or years to avoid (like the bias drift issues on the JCM2000)?

There’s a 2007 near me. Wondering other than tube age if there’s any risk.
 
2112 said:
Clippage

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Awesome riffage.

I don’t even bother boosting mine half the time, and when I do it’s generally just with an EQ doing a mild low cut. Depends on guitar and how it’s dialed, but I’ve found it doesn’t generally need more mids (808) and I find the SD1 sometimes cuts out too much bottom end and I have to compensate with depth.

Which is another great thing about it, you can go straight in and its largely already there. 🤘
 
JVM is such a good amp. @santiall did a sensational job on it!

I have the Satriani JVM.

I typically use clean green or orange, gain around noon, channel volume around noon, bass at noon, mids around 10 o'clock, and treble around 2 o'clock.

Crunch is usually Crunch Red: Gain around 2-3 o'clock, channel volume around 11 o'clock, bass at 11 o'clock, mids around noon, and treble around 2 o'clock.

OD1 and OD2 I usually use orange on one of them, and red on the other. Gains are usually around 11-12 o'clock. Bass 11 o'clock, mids around 2 o'clock, treble around 2-3 o'clock.

Main resonance and presence knobs I usually have around 1-2 o'clock.
 
LCW said:
Were there any changes between 2007 and now on the JVM410? Any issues or years to avoid (like the bias drift issues on the JCM2000)?

There’s a 2007 near me. Wondering other than tube age if there’s any risk.
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there were two changes back in 2007-08, the heater fuses were removed (with wire jumpers while the pcb stock lasted, then with a new pcb) and the pots were updated with nuts on the front panel.
It pretty much remained like that for years but at some point the Svetlana =C= EL34s were not available anymore and the amp was tested with other EL34 brands. Some of them had oscillation issues so they reinforced a couple of tracks on the pcb with a wire to prevent those ultrasonic oscillations. It was rather marginal though and it was never an issue till using JJs or EH, I am not sure what brand was trickier to use.
other than that I am not aware of anything although I haven't been in the company for some years...
 
santiall said:
there were two changes back in 2007-08, the heater fuses were removed (with wire jumpers while the pcb stock lasted, then with a new pcb) and the pots were updated with nuts on the front panel.
It pretty much remained like that for years but at some point the Svetlana =C= EL34s were not available anymore and the amp was tested with other EL34 brands. Some of them had oscillation issues so they reinforced a couple of tracks on the pcb with a wire to prevent those ultrasonic oscillations. It was rather marginal though and it was never an issue till using JJs or EH, I am not sure what brand was trickier to use.
other than that I am not aware of anything although I haven't been in the company for some years...
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So are 2007-2008 not recommended? Problematic?
 
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