The Boss PSM-5 Power Supply & Master Switch is a multifunction pedal designed to streamline pedalboard setups. Originally introduced in the 1980s, it served as both a power distribution hub and an effects loop switch, making it one of the most practical tools in the classic Boss lineup. This Red Label, Made in Taiwan version combines rugged construction with versatile functionality, making it a collectible and useful pedal for both vintage enthusiasts and working musicians.
The PSM-5 allows players to power multiple compact Boss pedals using the DC Out jack and daisy-chain cables (not included). Its effects loop function enables you to route a chain of pedals through the loop and bypass them all at once with the footswitch, effectively acting as a master on/off control. Standard Input, Output, Send, and Return jacks make it easy to integrate into any rig.
Praised for its reliability and clever design, the PSM-5 was discontinued in the late 1990s but remains a favorite among collectors and players who appreciate its dual functionality. Whether used as a vintage power hub or as a master switch for multiple effects, it stands as a reminder of Boss’s innovative approach to pedalboard management.
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