Alesis P3 Mini Transformer - 9V AC power supply for AI-2, AirFX-SynthFX, Akira, D4, DEQ224, DEQ230/D, MicroVerb3, MidiVerb3, NanoBass, NanoCompressor, NanoPiano, NanoSynth, ModFX Serie, 3630 Compressor, DM5, MicroVerb4, MidiVerb4, Trigger IO, PicoVerb, SR16