favorite this post 1970 50w Marshall JMP Full Stack or Singles - $5000 (Germantown) hide this posting unhide

1970 50W Marshall Head with all original transformers! It's had the caps and resistors "matched" and changed a master volume installed on the back. Here's basically what was done; Master Volume comes in AFTER the phase inverter tube, thus you have "power" amp sounding breakup without chewing through the actual power tubes. Also gain was marginally increased by increasing the resistor values on the first gain stage of both channels and the cathode capacitors were updated decreasing one value on the Channel II. There is a small toggle switch on the back that pulls an additional capacitor in and out of the Channel II. The bias voltage circuit for biasing the tubes was renewed. All of the capacitors and resistors in the power amp section were matched. If you buy "matched tubes" and the rest of the components in the parallel circuit aren't matched, it doesn't make much sense. The cabinet and amp aren't closet mint. This amp has been used and gigged because it sounds great.

Power Tubes; USA Made 6CA7's, Mullard preamp tubes. Best there is.

Sound's like a lot of mods but it really isn't, the amp can be easily restored to original with just a few resistor and capacitors. But, you won't. Both channels sound absolutely fantastic. I love the Channel one clean tone a lot. Honestly, when I play electric, I play more clean than I do with gain. Again, all three tranny's are original.

The Slant cab is from 1976. I used to own the matching 100w head, but sold it 20 or so years ago after I purchased the 50w head above. All the speakers are original with original speaker cone was re-conded by Orange County Speakers about 20 years ago with an original cone which they still had at the time. This slant cab is museum quality. I doubt there is a nicer '76 cab anywhere in the world. The tolex is almost perfect as are the edge protectors and grill. There is one 1/2" tear on the back one of my buddies did the one and only time I ever lent the cab (and head) out. The cab has all the original 25w Celestion G12H EK19 T1221 speakers with 1777 cones. Just absolutely mint for it's age. Signed inside by Ron.

The Straight cab has all original 25w Celestion speakers like above, none have been re-coned. It's signed inside by Ron and Jim Marshall. This cabinet has been used. It's got lot's of ware on it. It's solid, but not in the shape the '76 cab is in. I believe it's from '74, as that's what I was told when I bought it and the speaker numbers inside date from '73-'75, so it probably really is a '74.

Both cabinets have their original castors and handles. I have tons pictures of all the guts of both cabinets and the head. I can send upon request. They have all the numbers and views of the "stuff" you want to see. I absolutely have never heard a better sounding Marshall head than this one or I'd own it. I started playing in '73 and have probably owned 2 dozen Plexi's, JTM's and JMP's. This is the only one I own anymore. This is the amp.

The price is firm, it it the lowest I'll take, period. Don't ask. If you don't think this is a great deal, look on Reverb. This is a deal. Only trades I'm interested in are of other appreciating vintage guitars only: Old Gibson Archtops ES-350's or similar, old Martins, no Les Pauls, no amps. Maybe your grandfather left you a nice old acoustic or archtop that you just don't play and would like to trade. Please no newer instruments or amp trades, no boutique's. If this ad is up, you don't need to ask if it's still available, I will remove the ad when it's sold. I will separate and sell the cabs and amp individually for 3K for the amp, and $1250 for the straight cab and 1500 for the mint slant cab.
  • do NOT contact me with unsolicited services or offers

post id: 6927406493



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