The PD-0103-01 is the stereo Switched Output Jack (4 contacts) used in the Acousti-Phonic Preamp kits. Replaces your 1/4" output jack and provides automatic Stereo/Mono mode switching and power on/off functions.
Features
For Acousti-Phonic preamp kits
Replaces your 1/4" output jack and provides automatic Stereo/Mono mode switching