Marshall SV20H Studio Vintage 20w Head

The Marshall SV20H Studio Vintage Head brings the character of the original 1959 plexi into a more compact and manageable format. Built in the UK, this all-valve amplifier captures the open, dynamic response and warm breakup associated with classic late-’60s Marshall tones, while offering modern usability for today’s players.

With its dual, bridgeable channels, the SV20H allows you to blend Normal and High Treble inputs for a wide range of tones, from clean and articulate to full, driven sounds. The power reduction switch drops output from 20 watts to 5 watts, making it easier to push the amp into saturation at lower volumes. Combined with a switchable effects loop, it offers flexibility without moving away from its vintage-inspired foundation.

Highlights

• UK-built all-valve head inspired by the 1959 plexi
• 20W to 5W power reduction for volume flexibility
• Dual, bridgeable channels for blending tonal voices
• Classic Marshall EQ with Presence control
• FX loop for integrating external effects

Specifications

Body

• Type: Amplifier Head
• Dimensions: 19.7" W x 9.4" H x 9.1" D

Hardware

• Construction: Valve (All-Tube)
• Channels: 2 (Bridgeable)
• Controls: Normal/Loudness II, High Treble/Loudness I, Treble, Middle, Bass, Presence
• Inputs: 4 x 1/4" (High/Low Sensitivity)
• Speaker Outputs: 5 x 1/4" (16Ω / 8Ω / 4Ω)
• Effects Loop: Yes (Series, Switchable)

Electronics

• Wattage: 20W (switchable to 5W)
• Preamp Tubes: 2 x ECC83, 1 x ECC83 (phase splitter)
• Power Tubes: 2 x EL34
• DI Output: Yes (1/4")

Miscellaneous

• Weight: 20.4 lbs
• Country of Origin: Designed and engineered in UK, Made in UK
• Included Accessories: Detachable power cable, speaker cable
• Other: Studio Series plexi-style platform with vintage-inspired voicing

Why Buy from Tone Shop Guitars?

At Tone Shop Guitars, we pride ourselves on offering a curated selection of instruments backed by knowledgeable staff and exceptional customer service. Whether you're shopping online or visiting us in person, our goal is to help you find the right guitar and deliver a top-tier experience every step of the way.