The Blackstar PSU‑4 is a 9 V DC power supply with 4 isolated outputs, designed to power multiple effect pedals and guitar electronic units at the same time without interference or noise. Each output is isolated to prevent ground loops, hum, or interference between pedals, ensuring a stable power supply for live performances and rehearsals.

It includes 4 cables with different tips for maximum compatibility with most pedals on the market, and can supply up to 1000 mA in total for equipment with different power requirements. Its compact and efficient design makes it ideal for integrating into pedalboards without taking up unnecessary space.

With overload and short-circuit protection, the PSU‑4 offers a practical, quiet, and reliable solution for your guitar effects and accessories.