JBL GT4 12 inch Subwoofer in a Vibe Evolution CBR12 vented enclosure. 250watts RMS 500watts Program 1000watts Peak 23Hz - 450Hz Frequency response 93db 4 Ohm nominal resistance No amplifier included however a good match would be a vibe Edge EDB1000.1 Monoblock amplifier. Fully working despite the cone being split during its time in a sealed enclosure and repaired using the proper rubber T7000 glue and is an absolute monster if set up correctly. Bench test is available upon viewing if preferred
eBay
The Alpine SWD-1600 Powered Subwoofer is a high-quality car audio component designed to enhance the sound system of a vehicle. Manufactured by ALPINE, a reputable brand known for producing top-notch audio equipment, this subwoofer delivers deep, powerful bass to improve the overall audio experience in the car. With its compact size and specific manufacturer part number, this powered subwoofer is a perfect addition to any car audio setup looking to upgrade the sound quality and performance.
eBay
Featuring 8 (20cm) SWE subwoofer, Built-in 150W amplifier. The Alpine SWE-815 8 (20cm) Amplified Subwoofer Box gives you plenty of bass power taking the fewest possible space. 150W Max Power. Featuring 8 (20cm) Customised SWE-843E Subwoofer.
eBay
Rockford Fosgate P500-12P Single 12" 500 Watt Ported Powered Active Subwoofer Built-in Amplifier. Optimised 12" Low Impedance Woofer. The 12" high output subwoofer is impedance optimised for the built in 500-watt Class-D amplifier that features a low-pass crossover, bass EQ and phase switch.
eBay
Class D Monoblock power amplifier with DSP. The DBX series features three models from the compact 10” to the powerful 12” twin ensuring that there is an enclosure to match any vehicle and performance goals of even the most demanding user.
eBay
The TS-WX306T tube houses a durable woofer that is built with a Voice Coil Cooling System (VCCS), improving heat removal from the centre of the subwoofer, thus increasing frequency response and high power handling.
eBay
Product Description: Vibe OptiSound BMW 8" Woofer: OPTISOUNDBMW8-V4 • 8“ woofer fits into the under-seat enclosure• Easiest plug play installation due to car-specific baskets and harnesses• System can be used as passive or semi-active system• Approved compatibility with Fitment 1-series (E81/E82/E87/E88), 3-series (E90/E91/E92/E93), 5-series (E60/E61/F10/F11), X1 (E84) ESOTERIC CONE: Composite cone using paper, and wood fibres for a lightweight and rigid cone producing a natural vocal reproduction NEODYMIUM MOTOR: All drivers feature powerful neodymium motors which deliver maximum magnetic force with shallow installation depth SHALLOW SUBWOOFER: Custom tooled 8 inch subwoofer directly replaces the under seat installed factory speakers delivering improved .
eBay
Built-in 240W Amplifier (120W RMS). This compact subwoofer system works well under or behind the seat of a pickup truck, in a sedan trunk, or in the hatch of an SUV. The compact PWE-S8 amplified subwoofer system lets you add deep, accurate bass to your sound system without taking up much space in your vehicle.
eBay