Empty Bass Boxes & Subwoofer Enclosures UK

The complete empty bass box buying guide for 2026

An empty bass box lets you build a boot setup around the subwoofer you want, rather than a fixed package. This guide explains the difference between sealed and ported enclosures, the sizes available, and how to match a box to your subwoofer and amplifier for the best results in 2026.

Sealed or ported, and what size

We stock Recoil carpet enclosures in 10 inch and 12 inch sizes, in both sealed and ported designs. Sealed boxes give tight, accurate bass that suits all music styles, while ported boxes are louder and hit harder for those chasing maximum output. Choose the size that matches your subwoofer and the space in your boot.

The most common mistake is buying a box without checking the recommended enclosure volume for your chosen subwoofer, so always match the two. A sub that prefers a sealed box will sound boomy and uncontrolled in a large ported enclosure, while a sub designed for ported use can feel restrained in a small sealed box. If you mainly listen to detailed music and want bass that blends with your speakers, choose sealed. If you want sheer volume and presence for bass heavy genres, choose ported. Either way, secure the box in the boot so it cannot move, and run the correct gauge wiring from your amplifier for safe, reliable performance.

Head units and source units

An empty box is only part of the setup. Pair it with the right driver and power:

• Subwoofer driver. Match the box size to a 10 inch or 12 inch sub of your choice.
• Monoblock amplifier. Delivers the power a subwoofer needs for clean, deep bass.
• Wiring kit. Correct gauge power, earth and signal cable for a safe install.

Speakers that suit empty bass box

Pick the enclosure that suits your goal and available space:

• SUB10SG sealed 10 inch. Tight, musical bass in a compact footprint.
• SUB10PG ported 10 inch. Louder output with a fuller low end.
• SUB12SG sealed 12 inch. Deep, controlled bass for larger boots.
• SUB12PG ported 12 inch. Maximum impact for those who want it loud.

Brand quality at a glance

These are the manufacturers we stock most often for this range, each chosen for reliability and value in 2026:

• Recoil. Well braced, neatly carpeted enclosures built for daily use.
• JL Audio. Premium subwoofers that pair well with quality boxes.
• Vibe. Strong value subwoofers and bass packages.
• Alpine. Reliable subwoofers for sealed and ported builds.

Compatibility and fitting

A clean install needs the right adapters. For most empty bass box fits you will want:

• Fascia adapter. A trim panel that frames the new stereo so the dash looks factory standard.
• ISO harness. A plug and play loom that connects the head unit without cutting the original wiring.
• Steering wheel control adapter. Retains the stalk and wheel buttons for volume and track control.
• Aerial adapter. Matches the car antenna plug to the new stereo for full radio and DAB reception.

DAB, Bluetooth and smartphone features

A quality empty enclosure gives your subwoofer the best chance to perform, with features that matter:

• Braced construction. Reduces flex and unwanted resonance for cleaner bass.
• Hard wearing carpet. Protects the box and blends into the boot.
• Correct internal volume. Tuned for popular 10 inch and 12 inch drivers.
• Secure terminals. Easy, reliable connection to your amplifier.

Fitting help and advice

Each enclosure is checked before dispatch and arrives ready for your chosen driver. If you are unsure which box suits your subwoofer or amplifier, our Wolverhampton workshop can advise or build a complete bass setup for you. Fitting guidance is included with every order.

Why buy from Bass Junkies

Bass Junkies has been fitting and supplying car audio since 1995, and our Wolverhampton workshop builds and tests the kits we sell. If you are unsure which bass enclosure parts suit your vehicle, call the team on 01902 863 005 and we will confirm the exact stereo, speakers and adapters you need before you buy. Free UK delivery is available on qualifying orders.