Blackstar HT-20RH MK III 20-watt Tube Amplifier Head

Sale price$749.99 USD Regular price$999.99 USD

Infinite Shape Feature (ISF) dials in your drive tones

The tube-powered Blackstar HT-20RH MK III packs a massive spread of tones by virtue of its Blackstar's Infinite Shape Feature (ISF). When turned fully counterclockwise, you'll lend an American characteristic to your voice, with a tight bottom end and aggressive middle range. Turned all the way to the right, you'll enjoy more of a British vibe with a woodier sound that's less aggressive. However you dial in the HT-20RH MK III, you'll enjoy a musical response that commands attention.

Turn down the volume with 2-watt power scaling

A cranked low-wattage tube amplifier is truly one of the all-time classic tones of the 6-string world. Still, even medium-powered amps like the 20-watt Blackstar HT-20RH MK III deliver a window-rattling degree of decibels when pushed to their limit, making traditional cranked-up saturation unfeasible for musicians with volume concerns. Luckily, the Blackstar HT-20RH MK III’s onboard power scaling circumvents the issue entirely, allowing you to tame your amp all the way down to 1/10th power for screaming tube saturation at home-appropriate volumes.

Cutting-edge cab sims onboard

Thanks to the HT-20RH MK III’s baked-in CabRig technology, you'll never need to mic a guitar speaker again. This state-of-the-art speaker simulation DSP allows you to choose from hundreds of microphone and cabinet combinations from within Blackstar's easy-to-use Architect software. You can then output your CabRig signal on a 1/4-inch unbalanced or XLR-balanced cable or straight to your computer-based recording setup via USB.


  • A 2-channel, 20-watt update to Blackstar’s lauded HT series
  • Clean channel offers superb clarity and definition
  • Extensive overdrive channel includes a 3-band EQ and ISF control to cover everything from classic American grit to all-out high-gain British firepower
  • Both the Clean and Overdrive channels feature their own dedicated Voice control to switch up your sound
  • Onboard reverb imparts a sense of space and air to your tone
  • Effects loop with a +4dBu/-10dBV switch allows for easy integration of your time-based and modulation stompboxes
  • USB, balanced XLR, and 1/4-inch outputs equipped with Blackstar’s innovative CabRig speaker emulation technology
  • USB offers audio interface functionality for easy mic-free recording
  • 2-watt power scaling is ideal for late-night jamming, quiet recording, and any other situation where volume is a concern


  • Type: Tube
  • Number of Channels: 2
  • Total Power: 20W RMS (2W setting)
  • Preamp Tubes: 2 x 12AX7
  • Power Tubes: 2 x EL84
  • Reverb: Digital Reverb
  • EQ: Tone, 3-band EQ, ISF Control
  • Amp Modeling: American, British
  • Inputs: 1 x 1/4" (instrument), 1 x 1/4" (line in)
  • Outputs: 1 x 1/4" (8 ohm) 2 x 1/4" (16 ohm), 1 x XLR (line out),
  • Headphones: 1 x 1/4" (phones, line out)
  • Effects Loop: Yes, adjustable level
  • USB: 1 x USB-C
  • Footswitch I/O: 1 x 1/4" (channel, voice)
  • Footswitch Included: No
  • Computer Connectivity: USB
  • Features: CabRig DSP Cabinet Simulation
  • Software: CabRig, Architect
  • Construction Material: Black Tolex
  • Power Source: Standard IEC AC cable