HAO SP-1 Sole Pressure


  • Drive
  • Level
  • Normal/Bright/Warm


the manufacturer

Originally designed as a low frequency booster, Sole Pressure is an ideal pedal for those who want to add more lows and warmth to thin-sounding guitars and generates the fattest tones imaginable. When Drive knob is cranked, Sole Pressure is reminiscent of overdriven 6V6 tubes in the vintage tweed amps of the 50's. With Drive and Level controls and a 3-position mini switch, which lets you select from Normal, Bright, and Warm EQ curves, tonal options are infinite.

Most recent forum threads


  • Input Impedance
    1M Ohm
  • Output Impedance
    10K Ohm
  • Size
    115(L) x 64(W) x 30(H) mm (excluding knobs, switches, and jacks)
  • Weight
    Approx. 260g (including a 9V battery)

Where to find one?

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