JBL Bass Pro SL2 8” Underseat Subwoofer Boombox

8" Low-Profile Subwoofer Driver: Custom JBL-tuned driver designed for compact fitment with balanced bass output and durability. Built-In Class D Amplifier: Efficient onboard amplification providing clean power (approx. 125 W RMS / 250 W peak) without the need for an external amp. Slim Under-Seat Enclosure: Sealed, compact box shaped to slide under most vehicle seats — ideal for space-constrained cabins. Aluminum Chassis & Heat Management: The enclosure doubles as a heatsink to improve thermal dissipation and reliability under continuous use. Adjustable Low-Pass Crossover: Lets you tailor where the subwoofer starts to roll off, ensuring smooth integration with factory or aftermarket speakers. Gain Control for Level Matching: Easy adjustment to match the sub output to the rest of your system for balanced sound. Phase Switch: 0°/180° setting to help correct timing alignment with main speakers and reduce cancelation issues. Wired Remote Level Control Included: Enables quick adjustments from the driver’s seat without accessing the sub enclosure. Speaker-Level & RCA Inputs: Provides flexibility to connect with both factory head units (via high-level inputs) and aftermarket stereos (via low-level RCA). Auto Turn-On Signal Sensing: Automatically powers the sub when it detects input signal, simplifying wiring with factory radios. Factory System Compatibility: Designed to integrate cleanly with OEM systems, improving bass without requiring extensive modifications. Robust Internal Bracing: Reduces distortion and prevents unwanted rattling even at higher volume levels. Stealth Installation: Low profile and neutral black finish help the sub blend into vehicle interiors unobtrusively.