The Roland/BOSS PSA-120 adapter converts AC wall current to 9 volts DC current. If you want to save money on batteries and ensure stable performance gig after gig, the BOSS PSA-120 adapter is the recommended power supply unit for products including many BOSS compact pedals, the DB-66/88 metronomes, FC-Series foot controllers, MC-202, SH-101, SP-202, TR-626, and all TU-Series tuners. 

Capable of powering any BOSS effect pedal, including those with digital circuitry.
Converts AC wall current to 9 volts DC current. Power supply designed to operate a multitude of BOSS and Roland products.
Regulated with a higher milliamp rating for use with digital equipment.
Output: DC9V (regulated), 500mA
Tip negative, sleeve positive
3-meter cable
Status light that flashes if there are grounding problems
Small footprint (similar to a cell phone charger)

Roland PSA-120S Power Adaptor

  • Output Amps 500mA
    Output Voltage 9V
    Sleeve/Tip Configuration Tip: Negative
    Manufacturer Part Number PSA-120S
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