GP-20 Amp Factory


GP-20 Amp Factory

Bosscorp.co.jp 2005:

The GP-20 Amp Factory starts where all other pedals leave off, taking you far beyond overdrive and distortion with a variety of incredible COSM Guitar Amp models designed for live performance—22 in all! Thanks to its simple knob-based controls, two-channel operation, and outputs designed for connection to a standard guitar amp, the brilliant GP-20 can turn any guitar amp into a three-channel tonal monster. For recording applications, the GP-20 even includes a convenient digital output.

  • COSM Amp Modeling pedal with 22 killer amp models

  • 2-channel operation (Manual/Memory) plus Bypass turns any guitar amp into a 3-channel amp

  • Output Select switch permits connection to guitar amps or line-level systems

  • 5 onboard speaker cabinet simulations plus digital output for recording


  • Specifications
  • Nominal Input Level INPUT -20dBu

  • Input Impedance 1MΩ

  • Nominal Output Level OUTPUT -20dBu

  • Output Impedance 1kΩ

  • Recommended Load Impedance 10 kΩ or greater

  • Dynamic Range 108 dB (IHF-A typ.)

  • Controls ON/OFF Pedal, MANUAL/MEMORY Pedal, GAIN Knob, BASS Knob, MIDDLE Knob, TREBLE Knob, PRESENCE Knob, MASTER Knob, MODEL Knob, SPEAK-ER CABINET Knob, VARIATION Button, MEMORY/WRITE Button, OUTPUT Select Switch

  • Indicators POWER Indicator (serves also as battery check indicator), ON/OFF Indicator, MANUAL Indicator, MEMORY Indicator, VARIATION Indicator

  • Connectors INPUT Jack (Normal type), OUTPUT Jack (Normal type), DIGITAL OUT Jack (RCA PIN type), AC Adaptor Jack

  • Power DC 9 V: Dry battery (AA type) x 6, AC Adaptor

  • Power Consumption 85 mA (9 V max.) * Expected battery life under continuous use: Carbon: 9 hours, Alkaline: 25 hours, These figures will vary depending on the actual conditions of use.

  • Dimensions (W x D x H) 173 x 158 x 57 mm, 6-13/16 x 6-1/4 x 2-1/4 inches

  • Weight 1.1 kg / 2 lbs 7 oz (including batteries)

  • Accessories Owner’s Manual, Roland Service (Information sheet), Dry battery (AA type) x 6

  • Options AC Adaptor (PSA-series)