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Focal Integration IBUS20 - 8 Inch Active Under Seat Sub Enclosure


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Thanks to Focal’s expertise, you benefit from an ultra-thin subwoofer which can be perfectly integrated into your vehicle with great ease. It provides dynamic bass, and great ease of use. You no longer need to be an expert to enjoy a quality audio system in your car.

The subwoofer’s robustness comes from its compact chassis, and thanks to its ultra-thin design, it fits discretely under a car seat or in the trunk. What’s more, the remote helps you to stay in full control of the subwoofer. Its other strengths are the low-pass crossover and phase adjustment, which enable you to fine-tune your subwoofer to ensure perfect harmony with your audio system.


  • Flat 20 cm (8”) Subwoofer - Dynamic bass
  • Built-in amplifier - Brings power to the subwoofer
  • High and low level inputs - Directly connected to the speaker outputs of your car radio
  • 50 to 150Hz adjustable low-pass filter, 0-180° phase selector - Adjust your enclosure in harmony with your audio system
  • Compact Aluminum chassis - Low height, high rigidity
  • Remote control

Technical Specifications

  • Type: Active enclosure with 20cm (8”) subwoofer
  • Max. power: 150W
  • Nom. power: 75W
  • Frequency response: 45Hz - 150Hz
  • Height: 71.5mm (2.8”)
  • Length: 344mm (13.5”)
  • Width: 250mm (9,8”)

What's in the Box?

  • Amplified subwoofer
  • 9.5' Wiring harness (Power with in-line fuse holder/ Ground/ Remote turn-on/ Speaker level input)
  • Three 15 amp ATO fuses (2 installed in the subwoofer chassis/ 1 installed in the power wire fuse holder)
  • Remote bass level control
  • 18' Remote cable (RJ-25 plug on both ends)
  • Two 2" x 8" Adhesive backed hook and loop mounting fasteners
  • 4 Rubber feet
  • 8 Flat washers
  • Eight 3/16" Pan head screws (to mount the feet to the subwoofer)
  • Four 7/8" Self-tapping pan head screws
  • One 1/2" Self-tapping pan head screw (to mount wired remote)
  • Owner's manual

Further Information

Focal Integration IBUS20 - User Manual


We offer Free Delivery on orders to the UK Mainland over £100.


Our staff are passionate about what they do and can provide advice and assistance on your purchase.


You can return any unwanted and unused item within 30 days and get a full refund.


Orders can be placed on our fully SSL-secured checkout with Debit / Credit Cards or via PayPal, Apple Pay and Google Pay. 

The products we use and sell are of the highest quality and we trust them wholeheartedly, but every now and again a product has a fault that is covered under the manufacturers warranty.

In the event of such an occurance please contact us via email at to proceed with the warranty process.

Below is a list of all the Manufacturers warranty timeframes with any special instructions for extended warranties:


  • 5 Years standard Manufacturers warranty


  • 5 Years with Installation by an Authorised Installer (Studio Incar is an Authorised Installer)
  • 1 Year if you are doing your own Installation
  • 2 Years if you register the product with the UK supplier


  • 2 Years standard Manufacturers warranty


  • 1 Year Standard Manufacturers Warranty
  • 2 Year Extended Warranty - Product Registration within 30 days of Purchase


  • 1 Year standard Manufacturers warranty
  • 2 Years if you register the product with the UK supplier


  • 6 Months standard Manufacturers warranty


  • 1 Year standard Manufacturers warranty

Chord Company

  • Lifetime Warranty


  • 2 Years on Car Audio Products - No Extendable Warranty
  • 2 Years standard Warranty on Home Audio Products
  • up to 8 Years Extendable Warranty on Home Audio Products when you register at Dynaudio


  • 1 Year Standard Manufacturers Warranty
  • 2 Years Extended Warranty when registered with Focal


  • 2 Years Standard Manufacturers Warranty


  • 1 Year standard Manufacturers warranty
  • 2 Years if you register the product with the UK supplier

HiFi Rose

  • 2 Years Standard Manufacturers Warranty

JL Audio

  • 1 Year for Speakers and Subwoofers
  • 2 Years for Amplifiers and Processors


  • 1 Year Standard Manufacturers Warranty

Peachtree Audio

  • 2 Years Standard Manufacturers Warranty
  • 3 Years Extended Warranty if Registered with Peachtree


  • 2 Years Standard Manufacturers Warranty
  • 3 Years Extended Warranty if Registered with Pro-Ject


  • 4 Years for Passive Loudspeakers
  • 1 Year for Active Loudspeakers / Subwoofers
  • 5 Years for Passive Loudspeakers if Registers with Q Acoustics
  • 2 Years for Active Loudspeakers / Subwoofers if Registered with Q Acoustics


  • 1 Year Standard Manufacturer Warranty


  • 1 Year Standard Manufacturer Warranty


  • 2 Years Standard Manufacturers Warranty
  • 3 Years Extended Warranty if registered with Wharfedale
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