NPAD - New Preamp Day... Marshall JMP1 ::: VIDEO :::

fechart

Member
Messages
769
It was a steal, so I pulled the trigger... Never had a Marshall, I dig Marshalls but have an EVH.

I've read good and horrible reviews of the Jmp1. Don't know what to expect... Arrives tomorrow.

Anyway, my plan with it is to "get together" a marshall in three steps, as I don't have the cash for a Silver Jubilee or some top end model...

That's if I dig the Jmp1 of course...

Step 1. Completed. Having the Jmp
Step 2. Get a good power amp. VHT or even a Marshall
Step 3. Get a Marshall cab

For now, I'll be plugging the Jmp into the power amp section of the EVH... And see if I can have some fun!

Cheers!
 

Al Varez

Member
Messages
518
I always wanted to try this preamp. So many big name pro's use them(Iron Maiden, Def Leppard, ZZ Top). I never have because the used prices on these are jaw dropping for an old piece of rack gear. It seems like there's still a large demand for these. I don't get why Marshall completely stopped making these or never did a reissue.
 

fechart

Member
Messages
769
Tomorrow morning I'll have it in da house... I'll report later, maybe I'll do a couple of clips
 

fechart

Member
Messages
769
They're good. Been wanting One for years.
Don't discount used Mesa power amps.

Enjoy! Let me know if you hate it lol
I'm gassing for a second hand VHT 2 50 2 stereo PA, because of the excellent reviews and its features... Voicing, depth and Class A or AB. And it's EL34 based!
 

Tone_Terrific

Silver Supporting Member
Messages
32,716
A good power amp might be able to fix the sound of a JMP-1.
Otherwise, super crispy cleans with harsh breakover into distortion on the clean channel.
Weak cleans with massive fizz on the OD side.
It does big fuzzy tones well if that is your thing.
Not a blusey, mild crunch (Marshally) graceful transition to OD, imo.
You'll hear.
 

fechart

Member
Messages
769
A good power amp might be able to fix the sound of a JMP-1.
Otherwise, super crispy cleans with harsh breakover into distortion on the clean channel.
Weak cleans with massive fizz on the OD side.
It does big fuzzy tones well if that is your thing.
Not a blusey, mild crunch (Marshally) graceful transition to OD, imo.
You'll hear.
That's bad news... What about managing a really low presence? Does it help? On the other side, i have the Para Eq of my G system to tame the fizz, as I do with my EVH...
 

fechart

Member
Messages
769
For what I've read, the Jmp needs to be dialed well, it's not a one trick pony. Controls don't react like a normal amp. Tomorrow I'll tell ya...
 

Tone_Terrific

Silver Supporting Member
Messages
32,716
I am biased as I still hold a grudge about buying one when they were the 'great new thing' without a chance to wring it out thoroughly. It promised sooo much, looked good, nice build, nice controls. BUT!
Fortunately I bought and sold it for a good price.
They do have fans, so YMMV.
For fat but fuzzy ZZTop stuff of a certain era..perfect!
 

fechart

Member
Messages
769
I am biased as I still hold a grudge about buying one when they were the 'great new thing' without a chance to wring it out thoroughly. It promised sooo much, looked good, nice build, nice controls. BUT!
Fortunately I bought and sold it for a good price.
They do have fans, so YMMV.
For fat but fuzzy ZZTop stuff of a certain era..perfect!
I hate fuzzy tones! Early EVH is what I dig more...
 

RayBarbeeMusic

Gold Supporting Member
Messages
3,909
I had one, loved it, regret selling it. I tried it with various power amps, including Mesa, Marshall Mono Block EL34, etc. The best sound IMO was with a Peavey 50/50 tube power amp, where each side had a quad of EL84s. Sounded great. Also sounded great into the front of 2 silver face bassmans.
 

fechart

Member
Messages
769
I had one, loved it, regret selling it. I tried it with various power amps, including Mesa, Marshall Mono Block EL34, etc. The best sound IMO was with a Peavey 50/50 tube power amp, where each side had a quad of EL84s. Sounded great. Also sounded great into the front of 2 silver face bassmans.
The front? Not through the power amp section?
 

Serious Poo

Powered by Coffee
Platinum Supporting Member
Messages
6,655
A good power amp might be able to fix the sound of a JMP-1.
Otherwise, super crispy cleans with harsh breakover into distortion on the clean channel.
Weak cleans with massive fizz on the OD side.
It does big fuzzy tones well if that is your thing.
Not a blusey, mild crunch (Marshally) graceful transition to OD, imo.
You'll hear.
JMP1's are great preamps, but they do take a little bit to dial in.

OP - If you're ever looking to improve on an already great preamp, they can be modded by Voodoo Amps to increase their clean headroom and tame the preamp gain sections. I had the Platinum mod done on mine and have been a happy camper for a couple of years now. You owe it to your self to get a good tube power amp, though. That makes a big difference. FWIW, I use Mesa 2:90's for power and just love 'em.

Oh, information on the Voodoo Amps mods are located here:

http://www.voodooamps.com/home/Modi...rshallMods1/JMP1Preamp/tabid/150/Default.aspx
 

fechart

Member
Messages
769
JMP1's are great preamps, but they do take a little bit to dial in.

OP - If you're ever looking to improve on an already great preamp, they can be modded by Voodoo Amps to increase their clean headroom and tame the preamp gain sections. I had the Platinum mod done on mine and have been a happy camper for a couple of years now. You owe it to your self to get a good tube power amp, though. That makes a big difference. FWIW, I use Mesa 2:90's for power and just love 'em.

Oh, information on the Voodoo Amps mods are located here:

http://www.voodooamps.com/home/Modi...rshallMods1/JMP1Preamp/tabid/150/Default.aspx
Hey mate, I know the voodoo mods, they're great... But unfortunately I live in Uruguay, S. A. I don't think I'm going to ship it to NY... I'll try it tomorrow an report later. Cheers!
 

RayBarbeeMusic

Gold Supporting Member
Messages
3,909
The front? Not through the power amp section?
Yep through the front of the bassmans. Sounded great that way, and through the Peavey 50/50, which was EL84 based with presence and resonance. Sounded warmer through either of those than through the Marshall monoblock or the Mesa.
 

fechart

Member
Messages
769
Yep through the front of the bassmans. Sounded great that way, and through the Peavey 50/50, which was EL84 based with presence and resonance. Sounded warmer through either of those than through the Marshall monoblock or the Mesa.
Great! I might try it into the clean channel of the evh!
 

fechart

Member
Messages
769
Ok, I spent bout 3 hours with it today... First tried it through the Power Amp section of my EVH 5150 III 50 W head, then in one loop of my G System. The loops of the G are before the preamp section of the amp and after Filter and Comp. Very different results... Long story short, the Jmp1 ended settled in a loop of the G.

I must say this things smokes. That little piece of gear is a high gainer, I didn't expect that... As I'm an expert tweaking :) and I have a good knowledge of frequencies, in a few minutes I dialed a really good crunchy smoking tone. Think early Van Halen... OMG, I spent years trying to make the blue channel of my EVH sound more marshally, well now... Things get nice. The Jmp1 has a lot better response to dynamics than the EVH, and dialed correctly it doesn't sound fizzy, harsh or artificial at all.

Instead, I got this nasty midrangey awesome tone, that gets even better when I boost it with my OCD. Tweaked a bit the Para Eq of the G System, just to get the better out of the tone (I'm one if those that strongly recommend the use of eqs as tone shapers).

On the other hand, the Jmp1 is not a good low gainer, as far as I could see. I need to spend some more time with it, but for now, it's a keeper.

NOTE : In front of an amp , as I use it, settings for achieving a good tone can be weird. It sounds thin per se, you have to boost the bass and midrange. I even added some "mud" on 250 hz to make it sound fuller.
 




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