Boss PSM-5 Power Supply & Master Switch – Made in Japan (Vintage, 1980s)

I’m offering a Boss PSM-5 Power Supply & Master Switch, a vintage and now discontinued utility pedal made in Japan, designed as a central power and routing hub for classic Boss pedalboards.

The PSM-5 is not an effect pedal, but a master control and power distribution unit, allowing you to power multiple pedals from a single adapter and switch your entire pedalboard on or off with one footswitch. It also functions as a signal routing hub with Send / Return loop, making it a very practical piece of vintage Boss hardware.

This model was produced in Japan in the mid to late 1980s, during the high-quality Roland/Boss era. It is increasingly hard to find, especially in working condition.

Key Features

• Model: Boss PSM-5
• Type: Power Supply & Master Switch
• Country of manufacture: Japan
• Power: 9V (via Boss PSA adapter)
• Connections: Guitar input, Amp output, Send / Return loop
• Function: Powers multiple pedals + master on/off footswitch
• Status LED: Battery / power check indicator

Condition

• Fully functional
• Original Japanese unit
• Visible cosmetic wear consistent with age (scratches, paint chips)
• No modifications
• No box or power supply included

All details are clearly visible in the photos – this is an honest, vintage-used example, not a reissue.

Why it’s worth having

The PSM-5 is a rare utility pedal from Boss’ golden era, perfect for:

• Vintage Boss pedalboards
• Collectors of MIJ Boss pedals
• Players who want authentic old-school pedalboard solutions

Shipping & Terms

• Securely packed and shipped with care
• Tracked and insured shipping
• No trades, sale only