The super-slim RELAX RS10.4 10 inch subwoofer from BLAM will serve as a low-frequency foundation that will provide your system with ultra-low frequency range. At an installation mounting depth of just 66mm, this speaker is specially designed for extremely compact housings to take up minimal space in your vehicle. With a maximum output of 300W, an impedance of 4 O and a frequency response of 35 Hz to 500 Hz, this extra-slim subwoofer gives you the full range of sound you want and deserve.