Crazy Tube Circuits is a guitar-effects maker. The current GPAS selection includes HI POWER Dual Channel Amplifier & Overdrive, Unobtanium RAW Dual Channel Amplifier Overdrive and Super Conductor Multi-Mode Analogue Boost and covers overdrive pedals, boost pedals, delay pedals and phaser pedals. The model name matters because each effect has a different job in a rig.

For these products, compare effect function, control range, switching, bypass or routing, power requirements and the intended guitar or bass role. The product page is the authority for exact circuitry, connections, condition and included items.