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Vintage 1979 Park Marshall JMP Master Volume 100w Valve Amplifier


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Vintage 1979 Park Marshall JMP Master Volume 100w Valve Amplifier

Vintage 1979 Park Marshall JMP Master Volume 100w Valve Amplifier

Park was a division of Marshall amplifiers, built to the same quality and standards as the famous JMPs. At some point Jim Marshall wasn’t happy with the distribution that he was getting from Rose Morris, who had exclusive rights to distribute Marshall products, so decided to brand Marshall under a different name. And so Park amplifiers were born.

This is no exception to the rarity and build-quality of these favoured JMP’s.

Product Details

Serial: 455
Watts: 100 watts
Impedance: 4, 8 or 16 ohms
Valves: 4x EL34s + 3x ECC83’s
Transformers: Drake
Footswitch: NA
Weight: 20.3kg
Dimensions: 74x21x28cm

Service History

We pride ourselves on our inspections and the professional service of each amplifier, making this ready to plug in and play anywhere within the UK.

The recent service included the following:

– Main selector switch removed and mains wiring insulated to modern standards
– Controls were noisy so were cleaned and lubricated
– Missing chassis screw was replaced and the cabinet cleaned

Cosmetic Inspection

This is, by far, the best conditioned Park amplifier we have owned! The only thing worth mentioning is one of the valve covers on the ECC83 has been lost. Brilliant condition!


In our opinion, this is all original, except for the changed Park badge to a Marshall badge.


One of the best quality amplifiers you’ll find. These exceed the quality of most new amplifiers and are always on the increase in regards to collectability.

Come along and have a play!

Additional Information




Country of Manufacture




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.