Pyle-Pro PCA421 19'' Rack Mount Audio Signal Distribution Splitter by Pyle. $85.14. This rack-mountable signal distribution splitter allows you to split four balanced stereo inputs to eight unbalanced XLR mono audio outputs. It allows for input level conforming to the input signal and reduces electrical disturbance. Max output: 6 dB – dynamic range: 118 dB. Runs on 110 and 220 V AC.