








Alpine SWC-D84T6 Underseat Subwoofer Sub Enclosure for Volkswagen Transporter T6
Couldn't Load Pickup availability
The Alpine SWC-D84T6 is an 8" (20cm) dual voice coil subwoofer pre-installed in a sealed wooden enclosure, designed to fit under the passenger seat of the Volkswagen T6 and T6.1. It is part of Alpine's Adventure Audio range for VW campervans and utility vehicles.
A separate amplifier compatible with a dual 2 ohm voice coil subwoofer is required. The Alpine SPC-W84AT6-2 is a purpose-built 6-channel DSP amplifier and subwoofer solution for the same vehicles and is worth considering as a complete system upgrade.
Key specifications
- Subwoofer: 20cm (8") dual voice coil (2 + 2 ohms)
- Power handling: 60W RMS / 180W peak
- Frequency response: 34Hz – 1.5kHz
- Sensitivity: 91dB (1W/1m)
- Dimensions: 355 x 330 x 170mm
- Included: Subwoofer grille and installation brackets
- Vehicles: VW T6 (07/2015 – 10/2019) and T6.1 (2019 onwards) – California, Multivan, Transporter, Caravelle
Alpine Adventure Audio – Subwoofer with Enclosure for VW T6.1 / T6
Alpine's Adventure Audio range is engineered for the VW T6.1 and T6, with campervans and utility vehicles in mind. These systems are built to deliver strong sound quality in acoustically challenging cabin environments, are straightforward to install, and integrate neatly without altering the original interior look.
SWC-D84T6
The SWC-D84T6 is a 180W peak subwoofer pre-installed in a custom-fit sealed wooden enclosure for fitting under the passenger seat of the VW T6.1 or T6. It is compatible with the rotary seat of the California camping bus. A separate amplifier is required to power this subwoofer.
Powerful Bass Upgrade
The dual voice coil subwoofer sits in a sealed wooden enclosure designed to install neatly under the passenger seat. It is compatible with the rotary seats of the California version and with the 2-person front bench of the Caravelle — in the Caravelle with a 2-person bench, the installation position is under the driver's seat.
Includes Custom Installation Brackets
All required installation brackets are included for fitting the SWC-D84T6 under the passenger seat of the VW T6.1 or T6. A separate amplifier suitable for a dual 2 ohm voice coil subwoofer with 180W peak power handling is required.
Explore the full range in Vehicle Specific Audio.
Specification
| Frequency response | 34Hz – 1,5kHz |
|---|---|
| Measurements | 355mm x 330mm x 170mm |
| Sensitivity | 91dB/W (1m) |
More specs
| |
What's Included
- SWC-D84T6
- Included subwoofer grill
- Installation brackets
Alpine
About the Alpine SWC-D84T6
From our tech experts at CEN
A subwoofer enclosure shaped for the VW Transporter T6, designed to use the space under the seat or in the void rather than taking up load area.
Who it suits
VW Transporter T6 owners who want bass without losing usable space. On vans and campers this is nearly always the right answer, because a boot box is not an option.
Our tech experts advise
The enclosure is only part of it: the sub still needs amplification and setting up against the rest of the system. Fitment varies by model year and seat type, so get in touch to confirm before ordering. See car audio installation.
Explore the full Alpine range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Alpine
Recommended For You
Discover more top-rated gear, handpicked to go with what you're viewing
Alpine News & Guides
The latest Alpine product news, launches and guides from the CEN team in Nottingham.
Alpine iLX-F905D Halo9 Review: The Big-Screen Upgrade for Almost Any Car
The Alpine iLX-F905D Halo9 solves the biggest problem in car stereo upgrades: wanting a big screen in a car with...
Looking for Installation?
At CEN we take pride in being able to share the quality of our work as well as being able to show what incredible products we have installed week on week.



Frequently Asked Questions
Q: What does RMS power mean?
A: RMS is the continuous power a subwoofer can handle, and it is the number that matters when matching an amplifier. Peak or max figures describe short bursts only. Match your amplifier output to the RMS rating in the Specification tab.
Q: Can CEN build or supply an enclosure and fit everything?
A: Yes. CEN supplies enclosures and offers professional installation from our Nottingham premises, including amplifier wiring. Contact us to discuss your build.
Q: Does the SWC-D84T6 need an amplifier?
A: Yes. A separate amplifier suitable for a dual 2 ohm voice coil subwoofer is required.
Q: Will the SWC-D84T6 fit with a California rotary seat?
A: Yes. It installs under the passenger seat and is compatible with the rotary seats of the California. In a Caravelle with a 2-person bench it installs under the driver seat.
Q: Which Volkswagen models does it fit?
A: The T6 (07/2015 - 10/2019) and T6.1 (2019 onwards) California, Multivan, Transporter and Caravelle.

















































