A/B/C/D switcher- Connect 4 instruments, then choose one to run to one amplifier, or switch one instrument between 4 amps, etc. The C and D channels are selected from one switch, to save space. Only one channel can be used at a time, and one channel will always be "on". 
 
A Mute All switch can be added, it ca be selected in the drop down options here in the listing. 
 
Hand built with high quality Neutrik Rean jacks, bench tested prior to shipping.
 
Want to be able to have multiple outputs on at once? Check out our 3 channel buffered splitter with mutes. 
 
Measures 3.6" long x 4.6" wide 
Power: 9V DC (-) tip polarity, only required for LED’s.