Its shallow-profile, 8" woofer delivers low-frequency enhancement from a slim-profile enclosure. Find helpful customer reviews and review ratings for BassPro SL - JBL 8" 125W RMS Powered Under-Seat Compact Subwoofer Enclosure System at Amazon.com. By Jeph Preece 19 June 2018 Rockville SS8P 400w 8" Slim Under-Seat Active Powered Car/Truck Subwoofer Sub 4.5 out of 5 stars 1,617. Enclosure & Driver: The JBL BassPro SL2 features a single 8" woofer in a compact sealed enclosure. Wiring for the SL in the i3 was also VERY convenient since the i3's "headunit" sits under the rear seat. The woofer driver features a polypropylene cone with a butyl rubber surround, mounted in a durable ABS enclosure that's compact enough for mounting under seats and in tight spaces. View the manual for the JBL BassPro SL 2 here, for free. $179.70. JBL BassPro SL2 • Self Powered 8" Low-Profile Underseat Vehicle Subwoofer System • Class D Amplifier • 125 Watts RMS • Crossover Control • Remote Level Control Capability. JBL BassPro SL 8-inch 125W RMS Powered Under-Seat Compact Subwoofer Enclosure System (250 watts RMS: 125 watts) 4.4 out of 5 stars 120. Only 9 left in stock - order soon. … The BassPro SL powered woofer fits under the front seat of many vehicles, and supplements a car audio system’s full-range speakers with powerful bass. This manual is available in the following languages: English. The slim form factor meant it could nicely be side mounted in the trunk yet produce enough bass to make a difference. In comes the JBL BassPro SL (or even better, the SL2). JBL BassPro SL Review Made by Harman, the JBL BassPro SL is an under-seat subwoofer with the type of performance I've come to expect from Harman. The tight bass fills out a mix without dominating and it features a bigger sound than other under-seat subs. This manual comes under the category Car Speakers and has been rated by 1 people with an average of a 7.5. jbl(ハーマンインターナショナル)は、オートモーティブ製品のパワードサブウーファー「basspro sl(バスプロ エスエル)2」を5月中旬に発売する。