In line power supply for Alesis products.
The P4 is a higher-capacity "in line" supply with an AC cable coming in, and a cable going out terminating in a DIN connector that is the same size as a MIDI plug (but has 4 pins instead of 5).
Works with: Alesis QSR, DMPro drum machine, MIDI Data Disk, Quadraverb GT, Quadraverb, Quadraverb 2, S4 sound module, S4 Plus sound module, QS6 keyboard, Wedge, and 1622 mixer.
It's always good to have an extra power supply for your legacy Alesis gear. Put it in the cart today!