Minirig Subwoofer 4
Subwoofer 4 grille
Subwoofer 4 port
Subwoofer 4 Minirig in the box
Minirig Subwoofer 4
Subwoofer 4 grille
Subwoofer 4 port
Subwoofer 4 Minirig in the box

Minirig Subwoofer 4 Ultra Black

£179.95
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A compact rechargeable portable subwoofer, with a 50 W RMS amplifier, response down to 38 Hz, up to 100 hours of battery life and USB C fast charging.

Introducing Minirig Subwoofer 4 with our most significant improvements to date. We have invested years of dedicated Research and Development to refine the design, delivering enhanced power and precise control over the custom 74mm double neodymium driver. Furthermore, we’ve boosted the battery capacity from 28Wh to 33.3Wh.

The true power, however, lies in its connectivity: experience a complete modular wireless system by effortlessly linking the Sub 4 to multiple Minirig 4 speakers and Subwoofer 4s via Bluetooth. These internal upgrades are complemented by USB-C charging and full app control for detailed gain and EQ settings. This evolution results in what we confidently believe is the best, smallest portable subwoofer on the market.

What’s in the box:

  • Minirig Subwoofer 4
  • USB-C Charging Cable
  • High-Quality Audio Cable
  • Protective Travel Case
  • Eco-Friendly Recycled & Recyclable Packaging
Minirig Subwoofer 4 - Powerful

The smallest portable Subwoofer delivering powerful deep bass you can hear and feel

Minirig Subwoofer 4 - Connect

No more cables - Connect wirelessly and build your sound system

Minirig Subwoofer 4 - Pro Sound

The final piece - True deep bass requires a dedicated subwoofer

Type-C fast charging + Power Bank functionality

British-Made Engineering - built to last

Minirig App - customise & control your experience

Designed & Built in Bristol, UK

If you’ve made it this far, you’re on the right track. For over 12 years, Minirig has engineered the loudest and best-sounding small speakers in the UK.

They are built to last. We are committed to longevity and support our products with a 1-Year Warranty and dedicated repair process.

Start your portable sound system journey today

Technical Specifications

Dimensions L = 219mm W = 101.6mm H = 101.6mm

Matches the Minirig 4 perfectly

Weight 1051g

Weighs about the same as a large bottle of water

Driver 74mm high excursion double neodymium

Moves more air for deep, powerful bass from a compact subwoofer

Controls 3 multifunction buttons

Simple control of power, volume, pairing and more

Frequency response 38-150Hz

Extends your Minirig system down to a room shaking 38 Hz

Battery life max volume Up to 6 hours

Deep bass at maximum volume for up to 6 hours

Battery life average use Up to 40 hours

Keeps the bass going all weekend with typical use

Battery life low volume Up to 100 hours

Low level bass for days between charges

Standard charge time Up to 6 hours

A full charge in up to 6 hours

Fast charge time Up to 2 hours

A full charge in about 2 hours with a compatible USB C PD charger

Powerbank function Yes

Use the built in battery to charge compatible devices

USB-C Power Delivery Up to 18W

Fast charging external devices with flexible USB C Power Delivery up to 18 W

Amplifier power 50W RMS

Dedicated 50 W RMS power for deep bass

Bluetooth Bluetooth 5.0 with AAC

High quality AAC audio with link up mode and app support

Bluetooth Receiver Mode Yes, using line output or headphones

Send Bluetooth audio to a hi fi system or wired headphones

Bluetooth Range 20-40m line of sight

Freedom to move while staying connected

Audio input/output 2 x 3.5mm sockets

Connect by cable or link into a wider Minirig system

Construction Anodised aluminium and high impact ABS

A tough portable enclosure built for everyday use

Weatherproofing Splash resistant

Ready for light rain and splashes

Additional features Volume and balance control, accelerometer, microphone, 5 addressable RGB LEDs, USB C PD and over the air updates

Smart controls, lighting and updateable features that keep improving

App iOS, Android and Chrome on PC or Mac

Adjust bass, settings and firmware from a phone or computer

Standalone No, designed for use with a Minirig or Minirig Mini

Adds deep bass to a Minirig speaker system