Marshall SN20H Studio Classic JCM900 20W Valve Amplifier, Head

Experience the legendary Marshall tone in a compact format with the SN20H Studio Classic JCM900. This 20-watt valve amplifier head delivers the iconic crunch and sustain that defined generations of rock, all in a manageable size perfect for studios and smaller venues. Built on the proven JCM900 platform, it combines professional-grade circuitry with genuine tube warmth that digital modelling simply can't replicate. Whether you're tracking in the studio or gigging locally, this head offers the authentic Marshall character and reliability you've trusted for decades—now more accessible than ever. Power: 20 watts, switchable to 5W or less than 1W for lower volume. Valves: Uses ECC83 (preamp) and 5881 (power amp) tubes. Channels: Two channels (Clean/Crunch & Lead) with independent volume and reverb controls. EQ: Shared 4-band EQ (Bass, Middle, Treble, Presence). Effects: Built-in spring reverb and a series effects loop. Outputs: Includes speaker outputs for various impedances (4/8/16 Ohms) and DI/Compensated DI outputs for recording/live. Controls: Gain, Volume (Ch A/B), Reverb (Ch A/B), Master, Presence, Bass, Middle, Treble, Power Reduction switch, Standby, Power. Included: Footswitch for channel changing.