Ampeg A-4 Phaser


  • Rate
    controls the speed/rate of the LFO wave that controls the effect
  • Depth
    controls the depth/amplitude of the modulation (the size of the range in which the effect sweeps).
  • Color
    sets the amount of effected signal fed back into the effect (for a stronger effect)


made in 1982 and 1983

Most recent forum threads


  • Power
    Battery DC 9 Volt / Ampeg AC adaptor
  • Switching System
    "Noiseless" Solid state type
  • Overal Size
    68 (W) x 53 (H) x 120 (D) mm

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