So take a good look at your boot and make the 1 decision that your addition of a sub revolves around. how much space are you giving up for the enclosure?. Then choose from the 6 options i have produced that cover all aspects.
eBay
Shocking Bass Colorful Light Effect Bluetooth 5.0 Speaker With 2 Mics Portable Subwoofer Wireless Subwoofer Boombox Home Karaoke
Aliexpress UK
Ultra-low profile (5.6 in. 2 Sides/2 Sounds: design provides the ability to choose between Down-Firing mounting to increase the low-frequency extension and Up-Firing installation to obtain more punch and definition. ).
eBay
RGB Colorful Light Portable Waterproof 100W High Power Bluetooth Speaker Wireless Subwoofer Stereo Surround Subwoofer boombox
Aliexpress UK
Product Description: Our MDF subwoofer enclosures are an ideal way to improve your bass in your vehicle. Our MDF subwoofer enclosures are manufactured in our European factory, in which the highest of quality MDF is used as standard. Package Includes: - 10" MDF Enclosure Custom Fit Enclosure Specification: - Board - MDF 18 - Carpet - Black Melange - Speaker Size - 10"/25cm - Mounting hole diameter(mm) - 232 - Subwoofer depth(mm) - 100 - Port bassreflex - NONE - Volume closed enclosure(litres) - 15 - Weight(kg) - 8 - Enclosure Width(mm) - 700 - Enclosure height(mm) - 345 - Enclosure depth(mm) - 125 Please note, subwoofer not included.
eBay
Portable Waterproof 100W High Power Bluetooth Speaker RGB Colorful Light Wireless Subwoofer Stereo Surround Subwoofer boombox
Aliexpress UK
10" DOUBLE Sqaure PORT Bass BOX. The BASS BOX is in good condition. Has been installed before. Width of hole: 23cm Approx. M.D.F. CONSTRUCTION BOX. Height of hole: 23.5cm Approx. Depth across top edge: 20.5cm Approx.
eBay
6x9 inch Car Subwoofer Empty Box, Speaker Square Ultra-thin Passive Wooden Drawer,Car Audio Modification Subwoofer Housing
Aliexpress UK
WOOFER CUT OUTS: 9.35". Box Tuning : 33HZ. Speaker Wires NOT INCLUDED. Length: 13.75". WOOD TYPE: High Quality MDF MADE IN USA. Air Space Per Sub : 1.5 CF.
eBay
Double 6.5-inch Subwoofer 4-inch Tweeter Box,5.1 Center Speaker Empty Box Body,DIY Car/Home Woofer Housing,Wooden Bass Box
Aliexpress UK
This 8 inch subwoofer box is perfect for car enthusiasts who want to add some extra bass to their vehicle. The box is made of MDF and is covered in black carpet, making it both durable and stylish. With a slot-ported design, the box delivers powerful and clear bass that will enhance any music listening experience. Designed to fit 8 inch round speakers, this box is compatible with In Phase speakers and comes with binding posts for easy installation. It has a volume of 10 L and is suitable for DIY speaker projects. Whether you're upgrading your car's sound system or building a custom speaker, this MDF box will provide the perfect platform for your subwoofer.
eBay
Single 8-Inch Sealed Universal Speaker Boxes Car Speaker Box Car Subwoofer Boxes for Car Music
Aliexpress UK
A totally unique design that maximises bass output without taking up much space! They have been designed to combine the amplifier, subwoofer, and enclosure all into one fantastic product. This makes installation neater and easier as well as produces a great sound.
eBay
Double Hole 3-inch Center Speaker Empty Box,DIY Speaker Housing,Subwoofer Box,1Piece Mid-bass Sound Box,Customizable Hole Size
Aliexpress UK
Max Output Power: 600w / RMS: 90W. 1 x Active Subwoofer. 1 x Subwoofer High Level Input Line. Bass Boost: 0to+18db. 68 mm Slim fuselage, installed under the seat. Low Level Input Sensitivity: 300mV. High level Input Sensitivity: 0.9v.
eBay
DIY 6.5-inch(Hole Diameter:146/168mm) Car/Home Full Range Coaxial Speaker Box,Subwoofer Speaker Empty Box,Speaker Wooden Housing
Aliexpress UK