Shown in this photo are the DSP-3400's inputs and controls.
Input Connections:
Low Level Input (Line Input) - This subwoofer features a stereo low-level input. However, if you only have a single subwoofer line output on your receiver (which is the most common), you can simply use an RCA Y-adapter to connect the single line to the DSP-3400.
High Level Speaker Inputs - Left/right speaker connections from receivers or amplifiers that do not have a dedicated subwoofer line output can be connected to the DSP-3400's Speaker Level Input connections.
Controls:
Subwoofer Level (Gain, Volume), Subwoofer Cut-Off Frequency (Crossover), Phase (Continuously variable 0-180 degrees - matches in/out motion of the subwoofer driver with the satellite speakers).
