Marshall SN20H-U JCM900 Guitar Amp Head

Unleash Vintage Tone - The Marshall SN20H-U JCM900 Guitar Amp Head

The Marshall SN20H-U JCM900 Guitar Amp Head is a modern tribute to the iconic JCM900, capturing its legendary tone in a compact, studio-friendly design. Built in the UK at Marshall’s famed Bletchley facility, it combines vintage valve warmth with modern versatility, making it perfect for home studios, live gigs, or professional recordings. Featuring a dual-channel setup, players can switch effortlessly between sparkling cleans and high-gain leads, all shaped by intuitive EQ and presence controls. The hybrid design blends two ECC83 preamp valves, a dedicated ECC83 phase splitter, and two 5881 power amp valves to deliver the unmistakable Marshall crunch, with switchable output levels (20W, 5W, and <1W) for exceptional control at any volume. With a built-in spring reverb and effects loop, the Studio 900 lets you sculpt expressive tones with depth and character.

• Dual channels with footswitchable control for tonal versatility
• Power attenuation options: 20W, 5W, <1W for adaptable output
• Built-in spring reverb and effects loop for added depth and pedal integration

Designed for guitarists who demand flexibility without compromising tone, the Studio 900 Head offers robust connectivity and durability in a portable enclosure. The amp features five speaker output jacks (supporting 16Ω, 8Ω, and 4Ω loads), plus DI and compensated DI outputs for seamless integration into any rig. Whether you're chasing 90s rock nostalgia or carving out your signature sound, this amp delivers raw power, responsive dynamics, and authentic Marshall tone every time you plug in.

SPECIFICATIONS

• Power: 20W (with reduction to 5W), <1W
• Valves: 2 x ECC83, 1 x ECC83 (phase splitter), 2 x 5881
• Channels: 2
• Equalization: Treble, middle, bass, presence
• Speaker outputs: 5 x 1/4 inch jack (16Ω / 8Ω / 4Ω loads)
• Outputs: DI output, Compensated DI output
• Width: 510 mm / 20.1 inch
• Height: 245 mm / 9.6 inch
• Depth: 240 mm / 9.4 inch

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Since 1958, Chuck Levin’s Musictoner has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.