The JBL BassPro SL2 is a self-powered underseat subwoofer featuring an 8 inch shallow-profile woofer in a compact ABS enclosure driven by a 125W RMS Class D digital amplifier. It provides a 35Hz to 120Hz frequency response with a 12dB per octave crossover slope and onboard Bass EQ for low-frequency control.

Designed for under front-seat installation, the unit offers a variable crossover from 50Hz to 120Hz, 0dB to +9dB bass boost at 70Hz, and supports 0.05V to 2V line-level and 0.5V to 20V high-level inputs. Electrical specs include a 15A fuse, maximum current draw 12A, quiescent draw under 800mA, and physical dimensions of 344mm x 250mm x 71mm for fitment verification.