From private collection up for sale excellent condition 1982 Boss PSM-5 Power Supply & Master Switch.

Serial Number 191000 (first year of production) Made in Japan (Black Label).

Fully working, complete with specific PSA adapter, original box and printed manual.

Extremely rare in this condition and complete with all the accessories.

Photos speak for themselves.

Worldwide shipping, ask for quotes.

Follows description from manufacturer:

Introduced in 1982, the bright red Japanese BOSS PSM‑5 Power Supply & Master Switch, is not really an effect pedal per se. Up to the 1980s, effect pedals tended to be simple daisy‑chains with guitar at one end and an amp at the other with any number of pedals in between. As pedal boards became more complex there was a growing need for both a reliable power supply for multiple pedals as well a flexible means of routing the signal direct or through a number of pedals. The PSM-5 was an early attempt to cater for these more demanding situations, becoming an integral part of many musicians’ setups. Nowadays, it seems a relatively archaic way of doing things compared with modern sophisticated power supplies and compound switching systems. The PSM‑5 was the first BOSS power supply in their typical compact pedal format. Not only can it provide 9V power to up to seven BOSS (or compatible) 9V pedals but also it acts as an effect loop switch. When the loop is switched off, the signal is passed direct from the input to output jacks. When the loop is switched on, the signal is passed from the input to the Send output which can be connected to any number of effects before being routed back to the Return socket and then to the (Amp) output. There were not many competitors at the time, the nearest probably being the Electro‑Harmonix Switchblade, which was a simple A/B channel selector. On the vintage market, the PSM‑5 is currently both plentiful and cheap, so it may just fit the bill on a vintage pedal board.

Features:

• Made in Japan by Roland Corporation in 1982
• BOSS treadle footswitch turns the effect loop Send/Return on and off
• LED ‘Check’ light to indicate when the effect loop is in use (red for on and green for off)
• ¼” input (Guitar) and output (Amp) mono jack sockets plus ¼” effect loop Send and Return mono jack sockets
• External 9V DC power supply input  (no internal battery facility)
• 9V power supply out for up to 7 other BOSS pedals (PSA powered)
• Black ‘Made In Japan’ label on the base of the pedal
• Dimensions: 70mm (w) x 125mm (d) x 55mm (h)
• Weight: 340g

Disclaimer: minor characteristics due-to-age such as light pots scratching /  hums / hisses / reverb decay on every 10+ years old electronic equipment for sale may occur. For mentioned items are sold as-is according to the description and provider / e-commerce platform rules.

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