Focal ISUB Active 2.1 Car Underseat Subwoofer with 2 channel built in Amplifier. The ISUB ACTIVE 2.1 subwoofer is the perfect way to complete any factory audio system by bringing powerful (260W) and dynamic bass as well as amplifying the vehicle’s front channels (2.1). It connects to the HP outputs of the car radio through the Plug & Play cable supplied by Focal to genuinely enhance the sound experience, without taking up any space in the cabin or boot. Measuring 21/2 (6.3cm) high, it slides easily underneath a seat, even a tightly fitting one. Thanks to the different settings available, you can customise the sound reproduction as you wish. A wired remote control is also provided for users to adjust the bass level as desired. Ready to use (ISO Plug & Play cable supplied). Compact product, discreet integration. Various setting options adjustable incoming signal, adjustable amplifier crossover, volume boost, etc. Check the available space before the installation.