Marshall jmp 1

User Name Remember Me? Marshall JMP-1 pre Hey there, The only thing that really is a hindrance for me when recording, and always has been , is getting really good guitar tones. Tried plugins, tried pod like stuff, tried micing, all suck for me I have it for a month to decide I've been using a JMP1 preamp as part of my live rig for years and haven't found an alternative set up that gives me the same range of sounds - from Nile Rodgers to EVH.

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Content:

• Marshall JMP-1 review
• Marshall JMP-1 preamp is awesome, right?
• Marshall Amplification MIDI JMP-1 Handbook
• Does a JMP-1 Preamp sound better when recorded direct with a power amp?
• Tubes for the Marshall JMP1 Valve Midi Pre-amp
• Marshall JMP-1 Sim - does one exist?
• Tell me about the Marshall JMP-1 preamp
• Marshall JMP1 Midi Preamp
• Marshall JMP-1 Valve MIDI Preamp
• KitMonsters

WATCH RELATED VIDEO: Marshall JMP-1 Preamp

Marshall JMP-1 review

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Learn more. You may notice that the 'cookie consent' form pops up more often than usual lately - we are tweaking it behind-the-scenes to make sure it's working comprehensively. If you see it again it's because something has changed so please set your preferences accordingly. What preamp tubes to get for Marshall JMP-1? I've been told that I need 12AX7 tubes, but I was wondering if there is any quality differences among the companies that make 12AX7 tubes electro-harmonix, tesla, groove tubes ect.

Also I'll be using the JMP-1 for mainly heavy distortion. Should that effect my decsision on what tubes to get? Are certain tubes better for that purpose? Or do you have to order them? I have a JMP-1 and have replaced the valves a couple of times.

I did not notice a big difference. Maybe the Marshall valves sounded a little better than the cheap Eastern European ones. You do not need to replace them very often though.

I also put in a celestion greenback 25 in one of my mesa 1 x 12's and that was a good touch too. I'm able to record at relatively low volumes with this setup and get a great tone. Cheers, Lumen. The groove tubes idea isn't bad. They make a Mullard 12ax7 re-issue which is great in Marshall amps.

The vintage Marshall amps made in the 60's and 70's used Mullard tubes made in Great Britain. Those tubes are awesome!

You can buy tubes at GC but they will rip you off. There is this really cool place in my hometown called Antique Electronic Supply and they carry high-end New Old Stock tubes like the 12ax7 Mullard.

Pricey but well worth it for the tone you get. Check out www. Jack Pettit. Think of vintage tubes like fine wine. OK I'm a tube nut, anyway back to the question. If everything is working in your amp, good power tubes with the bias set correctly then pre amp tubes can make a subtle but noticeable difference. Just my 2 cents. Do you think the groove tubes mullard reissue pre-amp tubes would make that much difference in a JMP1?

I really couldn't tell that much difference between the cheap valves and Marshall branded. It is hard to tell because when I have changed valves there would always be an improvement of some kind because they are new. Well I'm mainly worried about heavy nu-metal deftones type distortion. So what do you guys think the best tubes for that would be?

Originally posted by karl Do you think the groove tubes mullard reissue pre-amp tubes would make that much difference in a JMP1? Originally posted by johnjm22 Well I'm mainly worried about heavy nu-metal deftones type distortion.

For the heavier distorted sound with a lot of gain but low noise I would use the 12ax7 Groove Tubes Mullard re-issue. As somebody said before it doesn't sound like the vintage Mullard but has the characteristics you are looking for. Most marshall stuff works better with ECC83's british 12ax7's. They are fuzzier and darker. Here you go dude. All the tubes you could ask for. I've ordered there a few times.

I got good service. I'll definitely give the Mullards a try. However, when you look at the Tubestore they say that Goove tubes are just rebranding at a higher price. Which 12ax7 is the mullard you talk about? Also, anyone know which tube Marshall brand? It seems there are only about 3 companies who make them. Sovtek, Svetlana and Tesla. Jay Kahrs. There are about six factories that make tubes, mostly in Russia and China. In something like a JMP-1 I highly doubt that you'll hear much a difference between different tubes like you would with a point to point amp like a vintage Plexi or a Matchless.

Keep in mind too that a lot of newer amps are designed around the tubes you can buy today and putting in NOS Mullards would be a total waste of money and good tubes. Originally posted by LumenStudio Yes they do make a difference. I swapped out stock marshall tubes and there's a difference, it's really hard to describe it though Cheers, Lumen.

Originally posted by karl Lumen. Are you talking about a JMP1 here? This is exactly what I was thinking.

I'm not sure that pre-amp tubes have as much affect as power-amp valves. Also I think that they have even less to show in rack units than amp heads or combos for some reason. I really did not see a huge difference from the Marshall valves to the unknown brand which were pretty cheap. In fact the cheap ones sounded better because they were replacing old tubes.

The only way you could really tell would be to get several sets of new tubes to compare. As I understand it even two sets of the same make can sound different. The biggest improvement in my guitar sound recently was some Apogee gear for recording! Well I went ahead and bought the Groove Tubes Mallard reissue. I'm expecting them to come in sometime this week. I let you guys know if I notice any difference.

Definitely let us know what happens. I'll be interested. Any news John? Sorry for the late reply. I can honestly say that I didn't notice any difference with the new tubes. I'm a little obsessive about this subject. Every brand and model of tube has a different sound. For the preamp stage, my favorites are Telefunken and black-plate RCA.

For el84 and el34 power tubes, Mullard is king. Make no mistake, fiddling for a whole day with a wide selection of vintage tubes will open your ears to a world you never imagined existed. Also buy the same models of black-plate RCA's. Ditto Mullard although Mullards are the most "neutral" of the bunch, and I don't use many of them. The "at" and "au" are lower output, so if you know you need heavy overdrive, you can skip those. But I use them, crank the gain up higher, and forego the option of heavy overdrive.

RCA is a little cheaper. Some people think Tele ribbed are better than Tele smooth, but I like them both. I'm not familiar with your amp, but a typical amp might have 2 to 5 preamp tubes. One is first gain stage, a second is volume stage to the power section. One may drive the eq. Another pair may drive the in and out of the reverb loop. I find that it doesn't matter too much what tubes even cheap Chines tubes drive the reverb loop, since it's sorta just noise not the direct tone of the guitar going through the reverb anyway.

But for the gain and volume stages, I'll spend hours swapping different tubes in different orders and different outputs ax, at, au. If you want to get a taste without diving headlong into the pool, just start with 12ax7 ECC I buy all my tubes on ebay from guys who have long histories of selling tubes, and I've never been burned. Learn to identify good quality used tubes, and you can save a bunch. Also, Mullard made tubes for a lot of other companies, who rebranded them.

Marshall JMP-1 preamp is awesome, right?

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Marshall Amplification MIDI JMP-1 Handbook

Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. Learn more here. I just don't like that sound The Voodoo mods ma Do more grab and less makeup gain on a clean channel and you have the clean tones sans effects. You don't even need the mesa power amp, DI it and then throw an impulse of a stock B cab powered by a tube power amp on it and that's that. Not a easy to cop the ZZ top live sounds though. This was supposed to approximate every Marshall tone you could think of but it se approximation of anything but the higher gain heads like the jubilee and the s. Not one of my favorite pieces of kit when I had it but I miss it now that its gone because it has its own sound.

Does a JMP-1 Preamp sound better when recorded direct with a power amp?

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Tubes for the Marshall JMP1 Valve Midi Pre-amp

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Marshall JMP-1 Sim - does one exist?

The original battery is mounted bang in the middle of the main PCB, so you really don't want this to leak. The serial number indicates that it was built in early which not only makes it twenty-eight years old but one of the first JMP-1s off the Marshall production line. In production for well over ten years, also says something about this little gem. Run into a valve power amp or two , it just sounds amazing and the quality of the speaker emulated outputs is definitely good enough to go straight into the board or your DAW. With most of the distortion being generated in the semi-conductor domain some of which is highlighted in the image below , many purists might shy away from this beast. On the other hand, classic Marshalls such as the legendary Silver Jubilee series and the monstrous JCM Dual Reverb, also use semiconductors to produce some of their distortion tones. And then there's the clean channel of the JMP-1 which is based on the classic Fender design Anyway, at the end of the day, it's the sound that counts and as I've said, these things have still got it, even today.

Tell me about the Marshall JMP-1 preamp

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Marshall JMP1 Midi Preamp

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Marshall JMP-1 Valve MIDI Preamp

Post by jimosity » 24 Sep , Post by Ice-9 » 24 Sep , Post by okgb » 30 Sep , Post by Ice-9 » 30 Sep , Post by zzzapfizz » 08 Oct , Post by sonicmojo » 16 Oct , Post by okgb » 16 Oct ,

KitMonsters

What's up with the JMP-1 being discontinued? Messages: 22, Likes Received: Is anybody here savvy on this preamp or why it was discontinued?