Rolls 4-Channel RCA Distribution Amplifier, +12 dBV Max Input Level, &gt;90 dB S/N Ratio Rolls 4-Channel RCA Distribution Amplifier - PS27s Power Supply - Rolls 1 Year Parts and Labor Limited Warranty Expands the output of a stereo device to multiple outputs Can raise the output level to true line level for any output Stereo 4 channel distribution amplifier Front panel volume controls