Marshall DSL20HR 20W Valve Head with Reverb – Switchable 20w/10w Head


Twin Channel

Includes footswitch

  • 20W Valve Head
  • With REVERB
  • "Ultra-gain" Channel
  • "Classic gain" Channel
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Marshall DSL20HR 20-Watt Valve Guitar Amplifier HEAD

The Marshall DSL20HR 20-Watt Valve Guitar Amplifier Head offers coveted Dual Super Lead tones in compact and road-ready head that is perfect for practising, recording, and gigging with. Revered by many guitarists due to its incredible power and expansive versatility, the DSL20HR combines classic Marshall character with contemporary appointments to make it the ideal choice for today's guitarists.

Classic Marshall tones

The DSL20HR is equipped with a power all-valve setup that gives this amp a huge tonal arsenal to play with. The pre-amp is home four ECC83 valves, which allow you to crank up the heat for a delightfully raucous sound. The power amp section has a pair of ECC83 valves combined with a pair of EL34 valves, which allows you to push your output to impressive levels that make this an ideal gigging amp.

In keeping with the demands of today's guitarists, the tonal versatility of the DSL has been matched with an output level attenuator to make the amp head more adaptable. The power reduction switch allows you to drop the output level to a manageable 10-Watts, perfect for smaller venues and recording. You can overdrive the valves without the unnecessary high-volume levels. Taking signal control even further, there is a 3.5mm jack output that allows you to practise in silence via headphones or take a direct recording output with studio cabinet emulation crafted by the genius crew at Softube.

Tone-shaping control

The instantly recognisable gold front panel display offers everything that you need to produce the perfect tone. The single instrument input sits next to the Classic Gain controls with corresponding Gain and Volume dials. The classic gain circuit offers the coveted JCM800 tones that so many legends have taken advantage of. Hit the channel select button to access the Ultra-Gain circuit, which allows you to ramp up your tones to brutal levels of overdrive.

Both channels share the passive EQ section, with Bass/Middle/Treble controls on hand that allow you to shape your EQ with incredible precision. The corresponding Tone Shift button reconfigures the pre-amp mid frequencies when activated, making it perfect for metal styles, and a great addition to this high gain monster. The DSL20HR benefits from Presence and Resonance controls, which allow you to attenuate the higher and lower frequency content of your tone independent of the EQ, so that you can further shape and enhance your tone.

Rear panel connectivity

Across the rear panel you'll find a selection of connections that open the amp.As well as speaker cabinet outputs for 16 and 8 Ohm loads, you'll find an FX Loop Send and Return for connecting external FX processors. The Emulated-Out jack provides a line level output for headphones or connecting to a mixer. The emulated output has been designed using Softube-designed studio cab emulation. You can rest assured that your headphone/recording signal offers the utmost fidelity for practise or recording.

Classic Marshall design

The Marshall DSL20HR 20-Watt Valve Guitar Amplifier Head adheres to the classic black and gold Marshall design we've all come to know and love. The solid enclosure is covered in hardwearing black tolex and black corner braces. The gold front panel complements the brilliant white Marshall logo.


  • Manufacturer    Marshall
  • Model    DSL20HR 20-Watt Valve Guitar Amplifier Head
  • Dimensions (H x W x D)     250 x 500 x 240 mm
  • Weight    9.7kg
  • Range    DSL
  • Technology    Valve
  • Channels    2 (Split) "Ultra-gain" and "classic gain"
  • Output wattage    20w (with power reduction option, 10w)
  • Connectivity    Inputs: 1 x 1/4-inch instrument jack, 1 x 3.5mm jack aux in, footswitch
  • Outputs: Speaker outputs: 3 x 1/4-inch jack sockets (16 Ohms load / 8 Ohms load), 1 x 3.5mm jack emulated line out
  • Controls    Classic gain channel (gain, volume), channel select, ultra-gain channel (gain volume), tone shift button, treble, middle, bass, presence, resonance, reverb, low power option (on rear)
  • Effects    Reverb
  • Effects loop    Yes, Send/Return
  • Pre-amp valves    4 x ECC83
  • Power amp valves    2 x ECC83, 2 x EL34
  • Included Accessories    PEDL-90012 Footswitch
  • Detachable power cable