(615) 915-1851 606 8th Ave S, Nashville TN
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Amplifiers

Marshall JMP 1986 Bass 50w Head 1970, Black

$4,800.00

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InstrumentAmplifiers
BrandMarshall
ModelJMP 1986 Bass 50w Head
FinishBlack
SKUAP4390-A
Made In Year1970
Preamp12AX7 (x3)
PowerEL34 (x2)
RectifierSS
Wattage50 Watts
Circuit1986 Bass
TransformersOriginal Drake
PT1202-118
OT784-139
Choke352-114
Built at the beginning of the metal-front era, this 50W Marshall is essentially all Plexi at its core. It features the same brown, hand-wired turret board from the previous era, and still carries all of its original preamp components, along with updated filter caps. The only other changes are a replaced pilot light and power-transformer shunt caps. 1k screen grid resistors were also added, as most techs consider them a mandatory update. See pictures for further details.

The iconic British rock “Plexi” tone is on full display here. The “Bass” 1986 circuit uses a shared V1 cathode and the preamp is effectively identical to the JTM45, minus a bright cap. This results in smoother breakup with less piercing high-end—something many players prefer. This amp is sure to impress, delivering the classic Marshall formula that helped cement the brand’s legendary status!
*When using Affirm, we charge an additional 3.5% fee on the total at checkout. The majority of our instruments are consignment, where CVG keeps a small percentage of each sale. To be able to cover the additional costs required to offer financing, we have to include a higher fee to the customer. The 3.5% fee will be included in and spread across your Affirm payments.

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