Marshal SV20H Studio Vintage Guitar Amplifier Head, 20 W
Legendary Plexi amp head with selectable 20-/5-watt power, 5 x speaker outs, switchable FX loop, and DI 1/4" output Item ID: MSV20HU
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Highlights
- Inspired by the original 1959SLP head
- Classic Plexi voicing in a studio-friendly format
- 20 W or 5 W selectable output power
- All-tube circuit with 2 x EL34 and 3 x ECC83
- High treble and normal channels, bridgeable
- Switchable series effects loop
- 16Ω, 8Ω, and 4Ω speaker output options
- Hand-built in the UK at the Bletchley factory
Description
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.
Specs
- Power Section
- 2 x EL34
- Preamp Section
- 2 x ECC83, 1 x ECC83 Phase Splitter
- Speaker Config
- None
- Wattage/Ohms
- 20 W or 5 W Operation with 16Ω / 8Ω / 4Ω Outs
- Effects
- None
- Channels
- 2, Bridgeable
- FX Loop
- Yes (Switchable)
- Footswitch
- No