The Marshall JVM210H is a 100-watt, all-valve electric guitar amplifier head engineered for ultimate tonal versatility and digital control. Hand-assembled at the Marshall UK factory, it bridges the gap between legendary vintage British grit and modern, ultra-high-gain performance.

Core Architecture & Tubes

• Preamp Section: Powered by five ECC83 (12AX7) vacuum tubes that manage the multi-stage gain structures.
• Power Amp Section: Driven by four EL34 tubes, delivering the punch, compression, and signature midrange roar of a traditional British stack.
• Physical Profile: Weighs 22 kg (49 lbs) with standard head dimensions ($750 \times 310 \times 215 \text{ mm}$) housed in rugged black Tolex.

Dual Channels & Six Sonic Modes

The layout features two fully independent channels, but the true flexibility comes from the three color-coded gain modes (Green, Orange, and Red) built into each channel:

• Clean/Crunch Channel:  
• • Green Mode: Pristine, high-headroom cleans reminiscent of vintage JTM45 layouts.
  • Orange Mode: Classic blues break-up and Plexi-style classic rock rhythm tones.
  • Red Mode: Aggressive, iconic JCM800-era hard rock crunch.
• Overdrive (OD) Channel:  
• • Green Mode: Hot-rodded Marshall crunch with significant heavy rock bite.
  • Orange Mode: Thick, saturated modern gain perfect for contemporary metal rhythms.
  • Red Mode: The highest gain capability ever engineered into an all-valve Marshall, offering massive sustain for molten lead styles.

Front-Panel & Power Shaping Controls

• Dual EQ Strips: Each channel features its own dedicated 3-band EQ (Bass, Middle, Treble), Gain, and Volume knobs.
• Dual Master Volumes: Two footswitchable master volume controls allow an instant, clean volume boost perfect for launching into solos.
• Global Power Controls: Presence and Resonance controls shape the high-end sparkle and low-end cabinet thump directly in the power stage.
• Digital Reverb: Studio-quality digital reverb with independent decay control adjustments for each channel.

Smart Switching & Back-Panel Connectivity

• Stompware Footswitch: Comes bundled with a programmable 4-way footswitch that connects via a standard guitar lead. It can map specific channels, master volumes, or complete preset patches.
• Internal Memory: The amp automatically remembers and recalls your last-used mode, reverb, and FX loop status when switching channels or power cycling.
• Full MIDI Integration: Includes MIDI In and Thru ports, enabling seamless mapping of up to 128 patch configurations via external multi-effect units or controllers.
• Dual FX Loops: Features one dedicated series loop and one series/parallel loop with an adjustable mix knob to blend wet/dry signals safely.
• Emulated Line Out: An XLR output sends a cabinet-simulated signal directly to PA mixers or recording interfaces, functioning even when the head is in standby for silent recording.
• Speaker Routing: Offers five selectable 1/4 inch output jacks supporting 4 Ohm, 8 Ohm, and 16 Ohm cabinet speaker configurations.