Contact us on 07970061897 or
  • Vintage 1973 Marshall JMP Lead Bass 20w Valve Amplifier Head
  • IMG_5796
  • IMG_5798
  • IMG_5799
  • IMG_5800
  • IMG_5801
  • IMG_5802
  • IMG_5803
  • IMG_5804
  • IMG_5805
  • IMG_5806
  • IMG_5807
  • IMG_5808
  • IMG_5810
  • IMG_5811
  • IMG_5812
  • IMG_5813
  • IMG_5814
  • IMG_5815
  • IMG_5816
  • IMG_5817
  • IMG_5818
  • IMG_5819
  • IMG_5820
  • IMG_5821
  • IMG_5822
  • IMG_5823

Vintage 1973 Marshall JMP Lead Bass 20w Valve Amplifier Head


In stock


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

Vintage 1973 Marshall JMP Lead Bass 20w Valve Amplifier Head

Vintage 1973 Marshall JMP Lead Bass 20w Valve Amplifier Head

This is one of the nicest 20w Marshall we’ve had in! Near enough totally original and in great condition. We are absolute suckers for these 20w Marshall amplifiers – they have the famous Marshall tone at lower volumes, hence their popularity. This particular version dates to 19th January 1973, and has a few light marks to the tolex, most notability on the front as pictured. The previous owner also scratched out the ’20’ on the back panel, otherwise in brilliant condition. Internally it has a matching set of ERA valves, original Daly capacitors, and transformers. It is an amazing example of this – near enough completely untouched and unmolested. You’ll struggle to find a purer example.

Serial Number: 1412E

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.

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.