1978-81 Marshall JMP 1987 Mk II Super Lead 50w vs Marshall Superlead Guitar Amplifier Head

The 1978-81 Marshall JMP 1987 Mk II Super Lead 50w and the Marshall Superlead Guitar Amplifier Head are both amplifiers sharing harmonically rich, dynamic. The 1978-81 Marshall JMP 1987 Mk II Super Lead 50w leans edge of breakup.

Similarity
citedBlended from circuit-archetype lineage, dynamic feel, tone-signal overlap and tone-vector distance — the tone vector itself is derived from editorial description text, not a measured acoustic signal, so this reflects how similarly the catalog copy describes the two, not a lab measurement. Shown only within a gear class, and only where there's enough evidence to be meaningful.

66% — moderately similar

Shared genres
citedGenres both listings are associated with.
  • Classic Rock
  • Rock
Shared tone character
citedDerived from overlapping tonal signals across both listings.
  • harmonically rich
  • dynamic
Citation fame
citedCitation/mention fame — how often this gear is cited across artist rigs and gear discussion.
0%
17%
Description

The Marshall JMP 1987 Super Lead is the 50-watt sibling of the better-known 100-watt 1959 Super Lead, sharing the same non-master-volume, four-input Plexi-family circuit at half the output. Produced across the JMP badge era of the mid-1970s to early 1980s, the Mk II designation reflects circuit revisions Marshall made over that production run. At 50 watts it reaches saturation at more manageable volume than its 100-watt sibling while keeping the same open, harmonically rich breakup that defines the non-master-volume Marshall sound. It is associated in this catalogue with Dave Murray of Iron Maiden.

The Marshall JMP Superlead 100 Watt is a classic 1970s-era tube amplifier delivering legendary British rock tone. Its 100-watt power and simple three-channel design provide fat, responsive overdrive and roaring lead sustain. The JMP Superlead appeals to classic rock and blues players.

Genres
citedGenres this gear is documented as being used in.
  • Metal
  • Hard Rock
  • Blues
Tonal lean
  • edge of breakup
—
Good for
citedOccasions this gear suits — judged per model, or derived from its wattage, connectivity and category.
  • Live
  • Live
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