800W Stereo Surround Sound. Peak Power：800W. Ultra-thin Subwoofer， Saving valuable space in your vehicle. Compatible with various car stereo audio systems and car host devices. Excellent Heat Dissipation ， Cast aluminum ensures stable performance.
eBay
800W Car Active Subwoofer Audio Speaker 20hz-150hz Frequency 90dB 2.6Ω Super Power Loud Sound Speakers 12V Ultra Thin Subwoofer
Aliexpress UK
Don’t fret though; I got you. The best place to install a small powered subwoofer would be under the driver’s or passenger’s seat, behind the back seat or in the back seat. This will depend on your type of car.
eBay
Subwoofer Speaker 100W 4 Inch Bass Subwoofer Speaker 4Ohm 8Ohm 4 Layer Voice Coil Bass Speaker For Car Audio Home Theater DIY
Aliexpress UK
8" 800W Car Subwoofer Speaker 12V Power Amplifier Audio Music Player. Max Power: 800W. 1x Subwoofer Speaker. Bass boost: 0to + 12dB. Low frequency ability of the bass horn, high quality low tone output.
eBay
Car Subwoofer Amplifier Board, 500W Subwoofer High Power Hifi Bass Amplifier Board DC 12V
Aliexpress UK
8" 800W Car Subwoofer Speaker 12V Power Amplifier bluetooth Audio Music Player. 1x Subwoofer Speaker. Bass boost: 0to + 12dB. Low frequency ability of the bass horn, high quality low tone output. Low level input sensitivity: 300mV.
eBay
4/5/6 Inch HiFi Coaxial Subwoofer 12V 2 Way Car HiFi Coaxial Speaker 4 Ohms Vehicle Audio Music Stereo Subwoofer 300W/400W/500W
Aliexpress UK
8" 800W Car Subwoofer Speaker 12V Power Amplifier Audio Music Player. Max Power: 800W. 1x Subwoofer Speaker. Bass boost: 0to + 12dB. Low frequency ability of the bass horn, high quality low tone output.
eBay
8-inch Car Subwoofer Empty Box, Density Board Drawer Speaker Housing,Honeycomb Maze Box,Passive Household Subwoofer Box
Aliexpress UK
1 x JBL BASSPRO HUB 11"(279mm) Spare Tire Subwoofer with Built-In Amplifier 200W OB#. Modern music really needs a good subwoofer to convey all of its power. Its line-level and speaker-level inputs make the BassHub Pro compatible with any car audio system.
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RMS 120w Car Audio System: 10-inch Powered Subwoofer Body, Pure Bass, and Under-seat Mounting of Ultra-slim Subwoofer Speakers
Aliexpress UK
Premium Quality OE AUDIO 12" Built in Amplified Active Single Subwoofer Box 1800 watts. SINGLE 12" ACTIVE ENCLOSURE Version 2. Depth at Bass: 36cm. 2” VOICE COIL WITH PP CONE. 12” WOOFER WITH 50 OZ MAGNETS.
eBay
10-inch Car Subwoofer Empty Box, Density Board Drawer Speaker Housing,Honeycomb Maze Box,Passive Household Subwoofer Box
Aliexpress UK
Max Power: 800W. 1x Subwoofer Speaker. High level input sensitivity: 1V. Low level input sensitivity: 300mV. Low frequency ability of the bass horn, high quality low tone output. Alloy fuselage to reduce the noise caused by the vibration.
eBay
RMS 120w Car Audio System: 10-inch Powered Subwoofer Body, Pure Bass, and Under-seat Mounting of Ultra-slim Subwoofer Speakers
Aliexpress UK