Marshal SV20H Studio Vintage Guitar Amplifier Head, 20 W

The Marshall SV20H Studio Vintage captures the essential character of the iconic 1959SLP Plexi in a more compact, controllable 20-watt head format. Powered by a pair of EL34 output valves and a trio of ECC83s—including one serving phase-splitting duty—it delivers the unmistakable harmonic density and touch sensitivity associated with full-size vintage Marshall stacks. The selectable 5-watt mode adds flexibility for home or studio applications without compromising the amp’s sonic identity.

This dual-channel design includes a classic high treble and normal input configuration, both of which can be used independently or creatively blended using a patch cable. EQ controls for bass, middle, treble, and presence offer further tonal refinement, whether you’re chasing bright articulation or thick, woolly saturation. A switchable series effects loop is built in for those needing outboard integration. The SV20H also provides output impedance options for 16Ω, 8Ω, or 4Ω speaker cabinets, expanding its compatibility across a wide range of rigs. Hand-built in the UK, it’s a thoroughly engineered tribute to the original, right down to its tonal aggression.

Shop All Marshall Gear

Shop All Amplifiers

Shop All New Arrivals