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Vintage 1973 Marshall JMP Organ 50w Guitar Valve Amplifier Head


In stock


We buy your vintage instruments for cash. Get in touch to find out more.

Vintage 1973 Marshall JMP Organ 50w Guitar Valve Amplifier Head

Vintage 1973 Marshall JMP Organ 50w Guitar Valve Amplifier Head

The 50 watt ‘Organ’ circuitry is almost identical to similarly released ‘bass’ models with the addition of a bright cap. The sound is known for being very similar to the famed 60s plexi tone due to the likened circuitry. The original 70s Marshall cover is included in the sale!

Serial Number: 7969E

Valve Brands: Marshall

Transformers: Original

Voltage Selector: 120v, 200v, 220v, 240v Selector

This amplifier has been serviced to a playable & safe standard, by one of our leading amp techs. To find out more about what our service includes, please check out our terms and conditions before purchasing.


Overall excellent condition, with only minor wear to the tolex. Please have a close look at the high resolution photographs below, as these form part of our description.


Internally and externally original, including transformers, except for minor service component changes i.e. caps,resistors, etc.

At The Music Locker we will do all we can for you to get the instrument you want. You’re more than welcome to come and have a play on this, coupled with one of our vintage guitars!

Additional Information

Country of Manufacture






In Stock



For more information on shipping prices, please visit our shipping page.

The Music Locker prides itself on offering vintage and collectable pre-owned instruments and equipment (the Products).

We take all reasonable steps to ensure the equipment has been inspected by a competent person in the UK to ensure it complies with UK safety standards. This may mean it does not comply with the current standards in the country in which it will be subsequently used. It is the purchasers’ responsibility to ensure it is inspected by a competent person knowledgeable with the relevant electrical safety standards within that country, prior to connecting to any live electrical circuit.

It is the philosophy of The Music Locker to keep all items as original as possible, only changing original components when absolutely necessary. This includes valves, capacitors, transformers, potentiometers, frets, etc. This gives the buyer the option of tailoring to their exact needs, and may mean that the item is not operating at optimum performance levels. Therefore, your personal preference may differ, depending on your circumstances (i.e. collector or musician), and you may decide to service the item in more depth upon receiving.

The Music Locker cannot accept responsibility for any costs of refurbishment to a standard different to the one advertised.