Marshall JMP Model 1987 50-Watt Amp Head 1972

This vintage guitar amplifer head is in great condition for its age, built in 1972

Professionally refurbished,. Plays great!

The 1972 Marshall JMP Model 1987 is one of the defining British valve amplifiers of the classic rock era. Rated at 50 watts and powered by a pair of EL34 output valves, this non-master volume head delivers the unmistakable Marshall roar that shaped countless recordings throughout the 1970s. Positioned between the earlier Plexi models and the later master volume JMPs, the 1972 version combines vintage warmth with a tighter, more aggressive character that has made it one of the most sought-after vintage amplifiers on the market. The Model 1987 retained the classic two-channel, four-input layout with independent Bright and Normal channels, giving players plenty of flexibility, especially when jumpering the channels together. 

Build Quality

Like most early 1970s Marshalls, the 1972 JMP was built to last. The steel chassis, hand-wired turret board construction, and robust transformers contribute not only to its legendary reliability but also to its unmistakable tone. Original examples are highly prized.

Sound

The first thing you'll notice is the immediacy of the amp. It has incredible touch sensitivity, responding effortlessly to your picking dynamics and guitar volume control. Clean tones are bright, punchy and full of harmonic detail, but there isn't a huge amount of clean headroom. Turn the volume past halfway and the amp begins to produce the glorious overdrive that has become synonymous with classic rock.

The Bright channel provides crisp attack and plenty of bite, making it perfect for cutting through a band mix. The Normal channel offers a fuller, warmer response with more low-end weight. Jumpering both channels together unlocks an even richer sound, allowing you to blend brightness with warmth to create one of the most iconic guitar tones ever recorded.

Unlike later Marshall models with master volume controls, the 1972 1987 needs to be turned up loud before it reaches its sweet spot. When it does, it produces thick, harmonically rich overdrive with excellent note separation and an organic compression that modern amplifiers often struggle to replicate.

Although rated at 50 watts, the Model 1987 is astonishingly loud. Through a quality 4x12 cabinet loaded with Celestion Greenbacks, it easily delivers enough volume for virtually any stage.

The amp excels with classic rock, blues rock, hard rock and early heavy metal. Players chasing the sounds of Angus Young, Paul Kossoff, Michael Schenker or early AC/DC will immediately appreciate its raw authority and expressive feel. Many guitarists also favour the 50-watt 1987 over the larger 100-watt Model 1959 because it reaches natural power valve saturation at slightly more manageable volume levels

Pros

• Legendary classic Marshall tone
• Outstanding touch sensitivity
• Rich, dynamic valve overdrive
• Superb build quality
• Excellent platform for vintage and modern pedals
• Highly collectable vintage amplifier

The 1972 Marshall JMP Model 1987 remains one of the finest rock amplifiers ever built. Its combination of dynamic response, muscular midrange and glorious valve saturation has earned it legendary status among players and collectors alike. Whether paired with a Les Paul, Stratocaster or SG, it produces inspiring tones that continue to define classic British rock.

For players seeking authentic vintage Marshall sound, few amplifiers deliver the same blend of aggression, warmth and musicality as a well-maintained 1972 JMP 1987. It is a timeless classic that continues to justify its reputation more than fifty years after leaving the factory.