See all 7 - All listings for this product. The BassLink SM powered woofer fits under the front seat of many vehicles, and supplements a car audio system’s full-range speakers with powerful bass. 4.0 out of 5 stars based on 5 product ratings. Overview: The Infinity BassLink SM2 compact powered subwoofer features a single 8" driver powered by a 125W RMS (250W Peak) built-in amplifier, and housed in a compact sealed enclosure that's designed to fit under seats and in tight spaces. BassPro SL - JBL 8" 125W RMS Powered Under-Seat Compact Subwoofer Enclosure System 4.3 out of 5 stars 65. Features. Free shipping. 4.0. Ratings and Reviews. $164.00. Infinity BassLink SM 8" Ultra-Compact Shallow Profile Hideaway Under-Seat Subwoofer System 3.9 out of 5 stars 55. $248.95. Its shallow-profile, 8" woofer delivers low-frequency enhancement from a slim-profile enclosure. Write a review. $299.95. Note: The Infinity BassLink SM2 does not include any wiring; a 10 ga. amp wiring kit is recommended (sold separately). item 7 Infinity BassLink SM 8" Powered Hideaway Under-Seat Subwoofer System 7 - Infinity BassLink SM 8" Powered Hideaway Under-Seat Subwoofer System.