95Studio
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- Joined
- Nov 15, 2010
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**Important** This amplifier operates on wall voltages between 200v - 250v. To use it in the US or other countries using 110v wall voltage, you would need to use a step up transformer to convert to 220v.
Ok, now that that's out of the way, lets get down to business.
This is a vintage Marshall JMP P.A 20 head. The test date on the tag says 11/07/69. Both the Power and Output Transformers are original. Most of the solder joints are untouched. As noted by the name, this is actually a PA amp. Circuit wise, this amp is almost identical to the Lead and Bass model also produced, with the only difference being one or 2 ceramic disk capacitors on the one channel, that brightens it up a touch. At some point prior to me owning it, someone has added these capacitors to this PA amp, effectively making it Lead and Bass spec.
Since I've had the amp, I've done a bit of maintenance on it. Firstly, I replaced the Bulgin plug socket with a NOS one, and the power cable that comes with it has a NOS male Bulgin plug on it too. I also replaced the indicator light with a new Marshall one. On the board itself, I replaced the onboard filter cap with a new 33/33uf 450v F&T capacitor, and also replaced the cathode capacitor and resistor for the power tubes.
Everything else is absolutely original.
The original pots all work well, with no noticeable scratching, and the amp in general is rather quiet from a noise perspective, with no extraordinary hiss, crackles, pops or anything like that.
The amp is currently tubed with Sovtek EL84's and Sovtek 12AX7's, and they seem to have plenty of life left in them.
The amp sounds wonderful! I often play my Les Paul through it and even though it's only a 20w amp, it really has that big amp sound, but without the ridiculous volume levels, but has plenty of volume to hang with the rest of the band in a gig situation. A decent Strat through the "Bass" channel is something to behold!
In general these amps have quite a lot of clean headroom. They don't break up nearly as much as the popular 18 watt Marshall amps, but they do produce some really nice, bluesy breakup and crunch as you increase the volume over 5. There are a couple of reasonable vids on Youtube that will give you an idea of the gain levels to expect from these amps. Sticking an overdrive pedal in front of it, instantly puts you in that classic 70's rock tone, and in general this amp takes pedals very well indeed.
The photos seen here were taken yesterday, so you can have full confidence that what you see is what you will get. I can take additional photos should you require.
I'm selling this amp from South Africa. I'll ship anywhere in the world, via a reliable shipping service.
If you're interested in this amp, make me an offer around $2000. I am negotiable, and so we can look at shipping costs and negotiate a suitable price including shipping.
Ok, now that that's out of the way, lets get down to business.
This is a vintage Marshall JMP P.A 20 head. The test date on the tag says 11/07/69. Both the Power and Output Transformers are original. Most of the solder joints are untouched. As noted by the name, this is actually a PA amp. Circuit wise, this amp is almost identical to the Lead and Bass model also produced, with the only difference being one or 2 ceramic disk capacitors on the one channel, that brightens it up a touch. At some point prior to me owning it, someone has added these capacitors to this PA amp, effectively making it Lead and Bass spec.
Since I've had the amp, I've done a bit of maintenance on it. Firstly, I replaced the Bulgin plug socket with a NOS one, and the power cable that comes with it has a NOS male Bulgin plug on it too. I also replaced the indicator light with a new Marshall one. On the board itself, I replaced the onboard filter cap with a new 33/33uf 450v F&T capacitor, and also replaced the cathode capacitor and resistor for the power tubes.
Everything else is absolutely original.
The original pots all work well, with no noticeable scratching, and the amp in general is rather quiet from a noise perspective, with no extraordinary hiss, crackles, pops or anything like that.
The amp is currently tubed with Sovtek EL84's and Sovtek 12AX7's, and they seem to have plenty of life left in them.
The amp sounds wonderful! I often play my Les Paul through it and even though it's only a 20w amp, it really has that big amp sound, but without the ridiculous volume levels, but has plenty of volume to hang with the rest of the band in a gig situation. A decent Strat through the "Bass" channel is something to behold!
In general these amps have quite a lot of clean headroom. They don't break up nearly as much as the popular 18 watt Marshall amps, but they do produce some really nice, bluesy breakup and crunch as you increase the volume over 5. There are a couple of reasonable vids on Youtube that will give you an idea of the gain levels to expect from these amps. Sticking an overdrive pedal in front of it, instantly puts you in that classic 70's rock tone, and in general this amp takes pedals very well indeed.
The photos seen here were taken yesterday, so you can have full confidence that what you see is what you will get. I can take additional photos should you require.
I'm selling this amp from South Africa. I'll ship anywhere in the world, via a reliable shipping service.
If you're interested in this amp, make me an offer around $2000. I am negotiable, and so we can look at shipping costs and negotiate a suitable price including shipping.
