This GTA-RSL remote subwoofer level control from Boston Acoustics eliminates the problem of varying bass levels in your music selections. The dash-mount knob connects to your Boston Acoustics GTA Series amplifiers with its 16-foot cable so you can adjust the sound from the front seat of your car. Not a bass boost, this controller adjusts the level of your Boston amp so you'll get consistent bass tones, no matter what the volume. The remote works with GTA-Series mono amps, as well as GTA full-range amps with the low-pass filter engaged. Warranty: 2 years.