Four line sources, one free input.
Your mixer has one line input left, and you have more sources than that. The MX400 is a 4-channel mixer for line-level signals. It brings up to four sources together quickly and without complications.
A LEVEL control for every source
Each of the four 1/4" TS inputs has its own LEVEL control, so you set each source against the others. The OUTPUT carries the mix on a ¼" TS connector. If one source is set too high, its channel may distort.
Keyboards into one line input
Connect your keyboards to the MX400, then send its output to a LINE IN on your main mixer. The manual shows exactly this setup.
Plug in and it is on
It measures about 46.5 x 57.2 x 103.6 mm (H x D x W). Power comes from an external 12 V supply. Connecting the supply to the mains switches it on, and the ON LED lights.
