Marshall - 1975 JMP Super Bass - 100 Watt Tube Guitar Amp Head - x040F - VINTAGE

The 1975 Marshall JMP Super Bass 100-Watt Tube Guitar Amp Head (Model 1992) is a vintage powerhouse revered for its warm, punchy tone and dynamic response. Originally designed as a bass amplifier, guitarists quickly discovered its rich harmonic character and smooth breakup, making it a favorite for classic rock and blues. This amp features two channels with four inputs (V1 and V2 bridgeable), and a control layout that includes Presence, Bass, Middle, Treble, and dual Volume knobs. With selectable output impedance (4, 8, or 16 ohms), it offers flexibility for pairing with various cabinets. The 100-watt output driven by EL34 power tubes delivers massive headroom and a thick, articulate sound that responds beautifully to playing dynamics and pedals.

Aesthetically, the 1975 Super Bass retains the classic Marshall look with black Tolex, gold piping, and toggle switches that mark the end of an era before rocker switches became standard. Many units from this year are highly original, though some may feature minor updates like replaced power sockets or soldered voltage selectors. Its tonal signature is often described as smoother and less aggressive than the Super Lead, making it ideal for players seeking vintage British tone with a bit more low-end warmth and clarity. Whether used in the studio or on stage, the 1975 JMP Super Bass stands as a testament to Marshall’s legacy of crafting amps that shaped the sound of rock music.