Wāvtech link4 LOC

The link4 can directly accept 4-channels of input and give you 4-channels of output.  It can accept 2-channels of input and give you 4-channels of output.  If you input 4-channels, you can sum them down to 2-channels of output and pass through another 2-channels for retained sub level control.  It even has a 3.5mm Auxiliary Input so you can add your phone or other portable device to the system.  No other 4-channel LOC can do all of that.  As an added bonus, it includes our "Patent Pending" Multi-Function Remote Level/Source Control that can adjust your subwoofer output level, the volume of the auxiliary source or serve as a Master Volume Control for your entire system.  This is especially useful in OEM systems where speed sensitive volume dependent equalization is present. link4 Features 4-Channel Line Output Converter 4-Channel Summing Processor (4-in/4-Out) Multi-Function Remote Level/Source Control Master Volume Control AUX Volume Control Independent CH3/4 Level Source