UK car audio comparison

Best Active Car Subwoofers
in 2026.

A practical comparison of car subwoofers using enclosure type, power, dimensions and the installation space they need.

Prices and stock should be checked on the retailer page before purchase.

Our approach. We compare the specifications shown on the retailer product pages and explain who each model suits. This is not a hands-on test.

Our pick

Pioneer TS-A2500LS4 1200W 25cm A-Series Component Subwoofer

A active subwoofer choice for adding more weight to the system.

Check price

Full specifications

Our picks compared

This table includes every verified specification available for the products in this roundup. Check the retailer page for the latest price, stock and fitment details.

Product	Price	Availability	Brand	Model	Warranty	Product Type	Subwoofer Design	Size	Listed Power	Type	Feature	Shipping Weight	Full specifications
Pioneer TS-A2500LS4 1200W 25cm A-Series Component Subwoofer	£89.59	In stock	Pioneer	TS-A2500LS4	Not listed	Subwoofer	Active	Not listed	1200W	Not listed	Not listed	5 kg	Speaker Design: Component
Phoenix Gold Z12D4 - 12" 1600 Watt Dual 4 Ohm Subwoofer	£93.60	In stock	Phoenix Gold	Z12D4	Not listed	Subwoofer	Active	12 inch	1600W	Not listed	Not listed	Not listed	All listed fields are shown
In Phase USW300 300W Underseat Ultra Slim Compact Active Subwoofer System Die-Cast Aluminium	£99.99	In stock	In Phase	USW300	2 Year Warranty	Car Subwoofers	Active	Not listed	300W	OEM Headunit Connection, Underseat Subwoofer	Built In Amplifier	5 kg	Product Detail: 4 Ohm Size Detail: Under Seat
Pioneer TS-WX010A Ultra Compact Space Saving Active Subwoofer with built-in Class-D Amplifier (160 W)	£116.19	In stock	Pioneer	TS-WX010A	Not listed	Pioneer	Active	Not listed	160W	OEM Headunit Connection, Under Seat, Underseat Subwoofer	Built In Amplifier	1 kg	Class: D amplifier
Juice JS12 1400W Bass Box Package with Ported Enclosure	£129.00	In stock	Juice	BX-JS12PL	1 Year Warranty	Enclosed Subwoofers	Active	Not listed	1400W	subpackage	Not listed	5 kg	Package Type: Enclosed Subwoofer Only, Enclosed Subwoofer with Amplifier (JA902)
Pioneer TS-WX140DA 170W 20cm Underseat Subwoofer	£141.78	In stock	Pioneer	TS-WX140DA	Not listed	Underseat Car Subwoofers	Active	Not listed	170W	Not listed	Not listed	5 kg	Class: D amplified subwoofers integrating DIGITAL BASS CONTROL, D technology, Pioneer’s TS-WX140DA is even easier to install, as it is capable of taking both High (

Product notes

What each pick is best at

Best overall bass upgrade

Pioneer TS-A2500LS4 1200W 25cm A-Series Component Subwoofer

A active subwoofer choice for adding more weight to the system.

What we like

Lowest listed price in this comparison at £89.59, £4.01 below Phoenix Gold Z12D4.
The only pick here listing 1200W power, giving it a clear difference from the other 5 options.
Its active design includes amplification in the product, unlike passive options that need a separate amp.

What we don't like

Unlike some alternatives, the listing does not show a comparable power figure, so matching it to the rest of the system takes more checking.
The enclosure and underseat or boot dimensions still need checking, even where the product is described as compact.

Price	£89.59
Availability	In stock
Listed Power	1200W
Model	TS-A2500LS4
Speaker Design	Component
Subwoofer Design	Active
Brand	Pioneer
Product Type	Subwoofer
Shipping Weight	5 kg

Check CarAudioCentre.co.uk

Best for compact installations

Phoenix Gold Z12D4 - 12" 1600 Watt Dual 4 Ohm Subwoofer

A 12-inch active subwoofer choice for adding more weight to the system.

What we like

At £93.60, it costs £4.01 more than Pioneer TS-A2500LS4, so the extra spend is tied to the specification and fitment choice.
The only pick here listing 12-inch size, giving it a clear difference from the other 5 options.
Its active design includes amplification in the product, unlike passive options that need a separate amp.

What we don't like

It is £4.01 above the cheapest pick, so the higher price depends on whether the distinct 12-inch size suits the installation.
The enclosure and underseat or boot dimensions still need checking, even where the product is described as compact.

Price	£93.60
Availability	In stock
Listed Power	1600W
Model	Z12D4
Size	12 inch
Subwoofer Design	Active
Brand	Phoenix Gold
Product Type	Subwoofer

Check CarAudioCentre.co.uk

Best for boot-based systems

In Phase USW300 300W Underseat Ultra Slim Compact Active Subwoofer System Die-Cast Aluminium

A active subwoofer choice for adding more weight to the system.

What we like

At £99.99, it costs £10.40 more than Pioneer TS-A2500LS4, so the extra spend is tied to the specification and fitment choice.
The only pick here listing 300W power, giving it a clear difference from the other 5 options.
Its active design includes amplification in the product, unlike passive options that need a separate amp.

What we don't like

It is £10.40 above the cheapest pick, so the higher price depends on whether the distinct 300W power suits the installation.
The enclosure and underseat or boot dimensions still need checking, even where the product is described as compact.

Price	£99.99
Availability	In stock
Listed Power	300W
Model	USW300
Subwoofer Design	Active
Warranty	2 Year Warranty
Brand	In Phase
Feature	Built In Amplifier
Product Detail	4 Ohm
Product Type	Car Subwoofers
Shipping Weight	5 kg
Size Detail	Under Seat
Type	OEM Headunit Connection, Underseat Subwoofer

Check CarAudioCentre.co.uk

Best for factory stereos

Pioneer TS-WX010A Ultra Compact Space Saving Active Subwoofer with built-in Class-D Amplifier (160 W)

A active subwoofer choice for adding more weight to the system.

What we like

At £116.19, it costs £26.60 more than Pioneer TS-A2500LS4, so the extra spend is tied to the specification and fitment choice.
The only pick here listing 160W power, giving it a clear difference from the other 5 options.
Its active design includes amplification in the product, unlike passive options that need a separate amp.

What we don't like

It is £26.60 above the cheapest pick, so the higher price depends on whether the distinct 160W power suits the installation.
The enclosure and underseat or boot dimensions still need checking, even where the product is described as compact.

Price	£116.19
Availability	In stock
Listed Power	160W
Model	TS-WX010A
Subwoofer Design	Active
Brand	Pioneer
Class	D amplifier
Feature	Built In Amplifier
Product Type	Pioneer
Shipping Weight	1 kg
Type	OEM Headunit Connection, Under Seat, Underseat Subwoofer

Check CarAudioCentre.co.uk

Best for stronger low end

Juice JS12 1400W Bass Box Package with Ported Enclosure

A active subwoofer choice for adding more weight to the system.

What we like

At £129.00, it costs £39.41 more than Pioneer TS-A2500LS4, so the extra spend is tied to the specification and fitment choice.
The only pick here listing 1400W power, giving it a clear difference from the other 5 options.
Its active design includes amplification in the product, unlike passive options that need a separate amp.

What we don't like

It is £39.41 above the cheapest pick, so the higher price depends on whether the distinct 1400W power suits the installation.
The enclosure and underseat or boot dimensions still need checking, even where the product is described as compact.

Price	£129.00
Availability	In stock
Listed Power	1400W
Model	BX-JS12PL
Subwoofer Design	Active
Warranty	1 Year Warranty
Brand	Juice
Package Type	Enclosed Subwoofer Only, Enclosed Subwoofer with Amplifier (JA902)
Product Type	Enclosed Subwoofers
Shipping Weight	5 kg
Type	subpackage

Check CarAudioCentre.co.uk

Best for flexible installation

Pioneer TS-WX140DA 170W 20cm Underseat Subwoofer

A active subwoofer choice for adding more weight to the system.

What we like

At £141.78, it costs £52.19 more than Pioneer TS-A2500LS4, so the extra spend is tied to the specification and fitment choice.
The only pick here listing 170W power, giving it a clear difference from the other 5 options.
Its active design includes amplification in the product, unlike passive options that need a separate amp.

What we don't like

It is £52.19 above the cheapest pick, so the higher price depends on whether the distinct 170W power suits the installation.
The enclosure and underseat or boot dimensions still need checking, even where the product is described as compact.

Price	£141.78
Availability	In stock
Listed Power	170W
Model	TS-WX140DA
Subwoofer Design	Active
Brand	Pioneer
Class	D amplified subwoofers integrating DIGITAL BASS CONTROL, D technology, Pioneer’s TS-WX140DA is even easier to install, as it is capable of taking both High (
Product Type	Underseat Car Subwoofers
Shipping Weight	5 kg

Check CarAudioCentre.co.uk

Buying guide

What to check before ordering

Start with the space available, then compare RMS power, enclosure type and input options. A factory stereo may need high-level inputs or a line-out converter, while a passive subwoofer needs a separate amplifier.

Use the model number as the final reference. Retailer images and prices can change, and vehicle fitment should be confirmed for the exact make, model and year.

Best Active Car Subwoofersin 2026.

Pioneer TS-A2500LS4 1200W 25cm A-Series Component Subwoofer

Our picks compared

What each pick is best at

Pioneer TS-A2500LS4 1200W 25cm A-Series Component Subwoofer

What we like

What we don't like

Phoenix Gold Z12D4 - 12" 1600 Watt Dual 4 Ohm Subwoofer

What we like

What we don't like

In Phase USW300 300W Underseat Ultra Slim Compact Active Subwoofer System Die-Cast Aluminium

What we like

What we don't like

Pioneer TS-WX010A Ultra Compact Space Saving Active Subwoofer with built-in Class-D Amplifier (160 W)

What we like

What we don't like

Juice JS12 1400W Bass Box Package with Ported Enclosure

What we like

What we don't like

Pioneer TS-WX140DA 170W 20cm Underseat Subwoofer

What we like

What we don't like

What to check before ordering

Best Active Car Subwoofers
in 2026.