If you want to run several long lines between the TV audio line and a receiver on the other side of the room, provide high gain through any line level signal source, allow longer cable lines to run, or require "buffering" to solve low volume problem, you shouldn't miss this stereo audio distribution amplifier. You can use it to add signal amplifiers between the line level signal source and the power amplifier, and the RCA jack matches almost all other product interfaces.This product can increase the sound quality of the control signal and reduce the bottom noise.