Change the frequency to apply more speakers. The old crossovers are rigid. If they are not suitable for users, they cannot be changed after they are installed. And the cost is higher. Powerful bass effect.
eBay
Car Subwoofer 10 Inch 800W Under Seat Car Audio Subwoofer Modified 12V High Power Audio System HIFI Sound Music Stereo Speakers
Aliexpress UK
The gasket is made from plastic material, which is more comfortable to use and lasts longer. 2 pieces Gasket.
eBay
600W Car Subwoofer 12V 8In Ultra-thin Seat Woofer Modification Subwoofer Car Speaker
Aliexpress UK
Specific Uses For Product subwoofer crossover Bookshelf Speakers. Audio Output Mode subwoofer crossover. Special Feature subwoofer crossover Bookshelf Speakers. Welding: - T for tweeter, - W for woofer, - IN for amplifier.
eBay
Car Mounted Subwoofer 1200W High-Power With Tweeter Modified 10 Inch Car Subwoofer
Aliexpress UK
EASY TO INSTALL. LONG LASTING. | The Massive Audio EQ4 Car Audio Equalizer is easy to install and produces amazing results for years! The EQ4 is the perfect device to enhance your Car Audio's performance, and the Best Car Equalizer in its class!
eBay
Car Audio Subwoofer 10 Inch Irregular Trapezoidal with Amplifier Car Active Subwoofer
Aliexpress UK
Change the frequency to apply more speakers. The old crossovers are rigid. If they are not suitable for users, they cannot be changed after they are installed. And the cost is higher. Powerful bass effect.
eBay
50Core High Power Overweight 1500W 4Ohm 10 Inch Speaker Driver Unit Car Woofer Subwoofer LoudSpeaker Bass High Fidelity
Aliexpress UK
Change the frequency to apply more speakers. The old crossovers are rigid. If they are not suitable for users, they cannot be changed after they are installed. And the cost is higher. Powerful bass effect.
eBay
DIY Audio Modification, 6X9- inch Connected Trapezoidal Dual Speaker Housing, Car Mounted Subwoofer Box
Aliexpress UK
Bass Maximizer & Restoration Processor. Why Choose Our Bass Maximizer?. Your subwoofer is yearning for this upgrade. MPN: Car_Audio_Bass_Processor Model: Car Audio Bass Processor Type: Bass Enhancer,Crossover,Bass Maximizer,Bass Restoration Processor,Digital Signal Processor Country/Region of Manufacture: Car Audio Bass Processor.
eBay
Grandnavi Digital Stereo 4 Channel Bridgeable Car Power Amplifier Universal Sound Car Amplifier HiFi Car Subwoofer Audio Player
Aliexpress UK
Change the frequency to apply more speakers. The old crossovers are rigid. If they are not suitable for users, they cannot be changed after they are installed. And the cost is higher. Powerful bass effect.
eBay
12V Power Subwoofer 2.1 Channel Car Amplifier Lepy LP-168S Auto Audio Bass Output HiFi Stereo Sound With AUX Function LoudSpeake
Aliexpress UK