Crazy Tube Circuits Hi Power Amp Sim/Overdrive Effects Pedal

Experience the iconic British tones that defined a generation with the Crazy Tube Circuits Hi Power. This premium overdrive and amp-in-a-box unit recreates legendary sounds inspired by the fusion of two classic tone machines: the renowned Colorsound Power Boost and the high-headroom Hiwatt amplifier. A favourite among guitar legends, the sonic character of this pedal echoes the celebrated guitar solos of Pink Floyd’s Wish You Were Here era, delivering endless sonic possibilities for professional musicians and enthusiasts alike.

Main Features

• Authentic British Tone
  Captures the classic Coloursound Power Boost’s transparent clean boost and full-on fuzz, utilising true-to-original BC184 silicon transistors running on an 18V internal booster circuit for enhanced headroom and dynamic response.

• Flexible 2-Band Baxandall EQ
  Shape your sound with precision by adding bite, midrange clarity and deep low-end rumble to tailor any guitar setup.

• Master Volume Control
  Unlike early Power Boost units, Hi Power includes a master volume knob that bypasses when wound fully clockwise, enabling refined control over boost and overdrive levels.

• Hiwatt Amp Emulation
  An all-analogue circuit section impeccably simulates the legendary tones of the Hiwatt tube amps, offering everything from pristine clean sounds to rich, crunchy distortion.

• Selectable Headroom
  Switch between a high-headroom 100W style power section using four EL34 tubes or a compressed, dynamic 50W style with two EL34s to replicate classic Hiwatt responsiveness.

• Three Input Channel Modes
  Choose the normal channel for full response, bright channel for added presence and tight lows, or combine both channels for an enhanced gain and frequency boost reflecting David Gilmour’s personal amp modifications.

• Passive Effects Loop
  Integrate your favourite pedals seamlessly between the booster and amp sections or use the pedals independently with an external looper. All pedals remain active even when Hi Power is bypassed.

• Power-Up Preset Function
  Customise the default on/off state for each footswitch on power-up. Ideal for use with remote pedal controllers or loopers.

Specifications

• Power Supply: Internal 18V DC booster circuit
• Transistors: BC184 silicon (original spec)
• Tubes: EL34 simulation (4 x 100W mode, 2 x 50W mode)
• EQ: 2-band Baxandall + Presence control
• Controls: Volume, Master Volume, Gain, EQ, Presence, Headroom toggle, Input channel selector
• Chassis: Sturdy orange enclosure
• Dimensions: Compact pedalboard-friendly design

Frequently Asked Questions