JBL BassPro Nano Compact powered subwoofer with 6"x8" sub and 100-watt amp at Crutchfield
Amazon.com: JBL BassPro SL2 Active Underseat Car Subwoofer with Built in Amplifier - Under Seat 8'' Subwoofer Car with 125 Watt Power Amplifier : Electronics
Subwoofer auto 30 cm driver passivo 12" JBL GT5-12
Amazon.com: JBL Subwoofer
Amazon.com: JBL SUBBP12AM - 12” amplified 12” Subwoofer with Sub Level Control : Electronics
JBL Stage 122 | 250W RMS 12" Single 4-Ohm Car Audio Subwoofer