JL Audio HD-RLC Remote level controller for HD Series amplifiers

Product Information

Model: 98118 | UPC: 699440981187 Crossover Filters (High or Low-Pass):Fully Variable Cutoff Frequency Selection: 50-500 Hz Detented and Calibrated Potentiometers  Variable Slope: 12dB/oct. Butterworth or 24dB/oct. Linkwitz-Riley Preamp OutputsBuffered, pass-through type Assignable input source on HD600/4 (“front” or “front + rear” summed)   Infrasonic Filter (HD750/1 only)24dB/oct. at 30 Hz, defeatable. Helps protect ported subwoofer systems from overexcursion caused by low frequencies below port tuning. Output Polarity Switch (HD750/1 only)0 or 180 deg. Helps quickly tune subwoofer to midbass speaker transition for optimal impact and coherence. Security Cover for ControlsA cast aluminum alloy security cover is included to keep unauthorized fingers away from your critical system settings.  Remote Level ControlRequires HD-RLC controller (sold separately). Assignable channels on HD600/4 (rear only or all channels) Multiple amplifiers can be controlled with one controller by adding standard phone cable splitter (not included).  This is a true level control, not a “bass boost”, and can be used as a subwoofer level control or as a full-range volume control, if desired.  Please note that the RBC-1 controller will NOT work with HD amplifiers… you must use the HD-RLC controller.