USDA 2X4 is one of our most popular products because it has so many uses. It's a stereo distribution amplifier that can send audio to multiple places, or combine stereo to mono, or do both! Keep one handy for emergencies. U.S.D.A. (Utility Summing & Distribution Amplifier) is a unique 2x4 mini-DA that can be used to combine or split audio signals for distribution. It can be used as a 1x4 or 2x4 DA in stereo or mono. There are 2 inputs (1 stereo pair) and 4 outputs (2 stereo pairs). Front panel...