Marshall JVM210H Incoming - Mods?

[D-Rock]

Sounds great man, nothing wrong with that 210H's tone.

 

[Bad.Seed]

Sounds great man, nothing wrong with that 210H's tone.

I agree, I'm pleasantly surprised. MAybe it was my room, the cab, or other factors that kept me from liking the multiple 205's I had, but I am really digging the JVM now. Tons of low end, sounds very full at higher volumes. I spent a lot of time playing it over the weekend. I doubt I'll do any modifications at this point.

The amp came loaded with JJ ECC83s Gold pin all throughout the preamp, and JJ E34L in the power section. Typically I like to tube roll, but I'm happy at this point so no need really. I may try a 12at7 in V1 to see how the orange channel reacts with less gain, but otherwise, I'm happy with it.

Anyways, here's some amp porn.

 

[JvZ]

I don't think any mods are needed on the 210.

Though, i amconsiedering a tube roll.. (Setup is still stock).
Ordered some JJ-EL34's already, and will do the preamp section later to ECC83's. (Or .. anyone has good ideas fot this.?)

Sounds pretty standard as a setup. But i hear good about JJ's, and they will make a difference to the standard setup.

 

[kmanick]

the JVM Forum looks like it's gone
these are the mods I had done to my 210H and it made the amp a real "keeper" no hiss, rounder
and thicker mids and the NF pot was just the best, it really lets you open up the amp and '"decompress it".
The guy I sold it to has a stock 410 and wanted to mod it
and when he played thought mine he just bought it, he couldn't believe I had literally zero hiss in OD orange even with the gain at 2:00
We should sticky these somewhere as IMO they are absolute must have mods if you're are having noise issues.

#1 Lower gain on OD1 -Gain Reduction Mod
100k metal film resistor across R128
or a 500k No load pot piggy backed across R128

negative Feedback Mod
Replace R58 with a 47k resistor or
replace R58 with a 33k resistor wired in series with a 1m log pot.

Plexi Mod
1Uf capacitor in parallel with R97

OD2 to OD1 mod
Change R44 from 47k to 33k
- Change C31 from 1n5 to 1n0 (.001 ufd)
- Change C32 from 1n0 to 3n3 (.0033 ufd)

 

[napalmdeath]

I managed to snag a mint JVM 210H off ebay over the weekend, specifically for the purpose of modding it out.

I have had 2 of these amps before, and I liked the basic voicing, but in the end, couldn't get along with it enough to keep it.

My gripes (which seem to be standard for this head)
OD Orange and red are too noisy
There is too much gain on orange and red OD channels
The amp is sterile and solid state sounding when turned up to gigging volume
Brittle high end and lacking a general fullness.

I know there are mods out there that are supposed to combat this, but didn't know if anyone around here had completed them with good results?

Let me know of any feedback or experience regarding modifying the JVM series

JJ KT77's, a 5751 in V2, and an ISP Decimator!

 

[Bad.Seed]

the JVM Forum looks like it's gone
these are the mods I had done to my 210H and it made the amp a real "keeper" no hiss, rounder
and thicker mids and the NF pot was just the best, it really lets you open up the amp and '"decompress it".
The guy I sold it to has a stock 410 and wanted to mod it
and when he played thought mine he just bought it, he couldn't believe I had literally zero hiss in OD orange even with the gain at 2:00
We should sticky these somewhere as IMO they are absolute must have mods if you're are having noise issues.

#1 Lower gain on OD1 -Gain Reduction Mod
100k metal film resistor across R128
or a 500k No load pot piggy backed across R128

negative Feedback Mod
Replace R58 with a 47k resistor or
replace R58 with a 33k resistor wired in series with a 1m log pot.

Plexi Mod
1Uf capacitor in parallel with R97

OD2 to OD1 mod
Change R44 from 47k to 33k
- Change C31 from 1n5 to 1n0 (.001 ufd)
- Change C32 from 1n0 to 3n3 (.0033 ufd)

I have the 410H now but I'd definitely still consider doing these mods. Man, I think I need to go plug it in. Lol!

 

[Texhex]

https://www.thegearpage.net/board/i...hannel-noise-feedback-problem-solved.2001900/

 

[Monkey Man]

@kmanick will those mods work properly on a 410H?

 

[JvZ]

Anyone tried a ECC823 in V6 of a JVM210 .?

 

[kmanick]

@kmanick will those mods work properly on a 410H?

yes but you don't need the Od2 to OD1 mod unless you want both OD channels voiced the same.

 

[mchn13]

Man i dont mean to piss in the punch; but i had a jvm210, jcm800, and a dsl100, at the same time, and the jvm just got bullied by those two. The 800 was a 2204, and could just bury it in the room, and the dsl, boosted, was a surprisingly good death metal amp.

 

[kmanick]

Man i dont mean to piss in the punch; but i had a jvm210, jcm800, and a dsl100, at the same time, and the jvm just got bullied by those two. The 800 was a 2204, and could just bury it in the room, and the dsl, boosted, was a surprisingly good death metal amp.

I believe it , My Splawn totally buried my JVM. My bandmates were always telling me to turn up with the JVM, not so with the Splawn. I think the JVM is great in a one guitar band , with 2 you can hear how compressed it is and it gets buried easily. I loved it (I had it as my main amp for 8 years) but when I started jamming with bands again 2 years ago , it got a little frustrating if I was playing with another guitarist.

 

[JvZ]

Glad you like that one.

I still love my JVM210, and own a smaller DSL too. I love that one also very much.


Anyone tried a ECC823 in a JVM lately .?

 

[PDC]

This is without doubt the best sounding modded JVM clip I have ever heard - playing starts at 3:50. Negative feedback mod and MM iron along with what the tech calls the ‘Plexi’ mod. If I could get an amp that sounds like this...

 

[Dino 939]

I believe it , My Splawn totally buried my JVM. My bandmates were always telling me to turn up with the JVM, not so with the Splawn. I think the JVM is great in a one guitar band , with 2 you can hear how compressed it is and it gets buried easily. I loved it (I had it as my main amp for 8 years) but when I started jamming with bands gain 2 years ago , it got a little frustrating if I was playing with another guitarist.

I totally get it.
When someone brings a Wizard over here, the other guitarist is in trouble.
Not just because of volume.
It's the Hiwatt like mids.
Now if the other dude has a Dual Rec..?
The Wizard & Dual together is INSANE.

 

[311boogieman]

^ not the same obviously but my Rectoverb + Splawn together is my happy place.

This is without doubt the best sounding modded JVM clip I have ever heard - playing starts at 3:50. Negative feedback mod and MM iron along with what the tech calls the ‘Plexi’ mod. If I could get an amp that sounds like this...

Yeah - that dude as tone and talent for days I'm assuming you've seen his Quick Rod vid?

 

[PDC]

Yes - and his Mesa Stiletto vid. He makes everything sound incredible. One of those few guys who’s knowledge of gear and tone equals his chops.

 

[Monkey Man]

yes but you don't need the Od2 to OD1 mod unless you want both OD channels voiced the same.

Thanks man!

 

[Rusty Riffs]

Well the first mod I would do is change the OD Channel to the same specs as OD1 on the JVM 410. That's the high gain modded Marshall sound. OD1 Amber on the 410 is pure 800 crunch slammed with a pedal type sound. OD1 Amber is the main reason I own the amp. And unlike from a poster above, I love the effects loop. OD1 Red, is just over the top Marshall voiced high gain. Crazy levels of gain.

The OD channel on the 210 is voiced from OD2 on the JVM 410 with the lower mid more modern Boogie (ish) tone. I never use OD2, in fact I've long wanted to mod OD2 on my amp to OD1 so I could have two different OD1 Amber channels and use different gain settings. Anyway that's the mod I would start with, once you do that then if you still need the mods, go from there.

I've wanted to get a JVM 205 just for the lower wattage but I've got other things to knock out on the want list before trying to find a good deal on a 205 and then have the OD channel modded to the 410 OD1.

Just my opinion though.

where the hell do i find this mod?? thanks

 

[John 14:6]

I managed to snag a mint JVM 210H off ebay over the weekend, specifically for the purpose of modding it out.

I have had 2 of these amps before, and I liked the basic voicing, but in the end, couldn't get along with it enough to keep it.

My gripes (which seem to be standard for this head)
OD Orange and red are too noisy
There is too much gain on orange and red OD channels
The amp is sterile and solid state sounding when turned up to gigging volume
Brittle high end and lacking a general fullness.

I know there are mods out there that are supposed to combat this, but didn't know if anyone around here had completed them with good results?

Let me know of any feedback or experience regarding modifying the JVM series

I had a choke added to my JVM 205H and had the lead channel modded to the JVM 410H's non-scooped lead channel specs. I got the OD2 to OD1 conversion info from the Marshall JVM Forum and then had Jeff Snider from Snider Amplification do the mod work. After the conversion the OD1 Orange mode was my favorite.