Manufacturer's Description:

Input and output buffers. Two types of summing. Master mute. Tuner send. Isolation. Summing The TX Interfacer has two types of summing: Stereo Sum and Split Sum. 

Summing

The TX Interfacer has two types of summing: Stereo Sum and Split Sum. To access these two modes, use the internal DIP switch to select which mode is best for you.

1. Stereo Sum – This is the default mode The TX Interfacer ships with.  In this mode use stereo effects as normal. When summed, the left and right inputs are merged and the exact same signal is sent to the left and right outputs.
2. Split sum – Still use stereo effects as normal. When summed, the right input is ignored and the left input is split to both left and right outputs.

The TX Interfacer comes with ground lift and phase correction for players that want to run more than one amp.

1. Ground Lift – A ground loop is never a welcome sound - a loud buzz when two amps are being used at certain venues - but it doesn't have to waste your time.  Simply push the black pushbutton on Interfacer and the ground loop will be eliminated! 
2. Phase Correction – When using multiple amps it is possible that the amps being used are out of phase with each other.  One speaker is moving in while the other is moving out.  Correct this easily by pushing the black and red pushbuttons in - inverting the phase on one amp by 180 degrees. 

For more information, visit https://goodwoodaudio.com/products/the-tx-interfacer?variant=32441408192559