Alpine SWR-843D 8 inch (20cm) Type-R Subwoofer Dual 4ohm Voice Coil

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Special Price £124.99 Save £243.24 (66%) rrp: £368.23
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Pioneer TS-SW841D 500W 8" single 4Ω voice coil shallow subwoofer
Key Features

Alpine SWR-843D 8 inch (20cm) Type-R Subwoofer Dual 4ohm Voice Coil

Extreme bass fits in more places
The Type-R Subs have been completely redesigned to offer more installation flexibility and application versatility to build the ideal sound system. At 115 mm of mounting depth for the 8” (20 cm) this new design offers even greater output capability.
More Excursion = More Output
The new FEA-Optomized Motor Structure together with our revolutionary High-Amplitude Multi Roll (HAMR) Suspension Design gives the new Type-R Subwoofers the highest X-max and SPL output in the category. With a real-world, measured 14 mm of X-max, allow the new 8” (20cm) Type-R Subwoofers to deliver the best-in-class bass output, ultra-low distortion, and unparalleled sound quality.
More Motor Force = More Control
Starting with a new ten piece, segmented magnet structure, the new Type-R subwoofers deliver more accurate, louder and cleaner bass with even more control. This new magnet assembly is also an integral part of the next generation of Alpine’s Patented Radial Vented VC cooling system.
Keep it Cool = Keep it Playing
Alpine’s Patented Radial Vented VC Heatsink and Airflow Management System (US Patent #7,634,101) helps to minimize power compression and ensures reliable long playing time by actively eliminating output-robbing heat away from the Voice Coil. The new one-piece cast aluminum frame with integrated shorting sleeve uses the entire frame as a heatsink, to allow for sustained power output and handling, even in the most extreme of applications.
FEA Optimized = Maximum Linearity
Alpine’s Patented Compound Radius Curve pole geometry ensure for an ultra symmetrical magnetic field, while optimizing flux density to greatly reduce distortion, while further improving power handling and output.
Improved Power Handling
The oversized 65 mm voice coil offers more than 35% more surface area, allowing for increased power handling to 600W RMS / 1800W Peak. To get the best performance, we recommend you pair Type-R subs with Alpine’s new PDX digital amplifiers.
  • RMS Power Handling: 350W
  • Peak Power Handling: 1000W
  • Mounting Depth: 115 mm
  • Mounting Diameter: 176 mm
  • Nominal Impedance: 4 Ohm + 4 Ohm (dual 4-ohm)
  • Frequency Response: 28-200 Hz
  • Sold in individual units 
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Questions/Answers About This Product

Question: 19 June 2014

Car: Seat Ibiza - <2008 -

Where would this cam be mounted? If it's inside the car, what is the visibility through 5% tinted windows? Thanks.


Hi This has to be mounted outside the car.

Question: 16 October 2014

Car: Honda Civic - 2005 > -

Hi, How much for this + fitting to a 2009 EX (with the satnav under the windscreen). The tooting branch is my local one. Cheers, Miles


Please call in to your local store for a quote they will be happy to help

Question: 24 December 2015

Car: Skoda Octavia - 2005 > -

I have an octavia 2015. Could this work with the screen I have in the car?


Good Morning, Which factory fitted head unit have you got in your Skoda Octavia? As this will depend on which input capabilities it has. Thanks

Question: 26 December 2015

Car: VW Transporter - 2005 > -

Hi can this be fitted to vw 2006 t5, with barn doors at the back? Worried that over it being fixed it might not be suitable? Also will any major holes have to be drilled through a door etc


Hi Conatct your local store.

Question: 03 January 2016

Car: Renault Megane - Megane II 2007> -

I have a Renault megane 111 2015 plate, i would like to know if this product can be installed through the inbuilt sat nav I have in my car and what is the cost of installation,thanks


sorry your factory radio wouldn't have an input for a basic aftermarket camera, this would normally something fitted by the factory because your car would have to be programmed to switch to an input when the car is put into reverse, i would suggest your better off contacting Renault and see if anything could be added by themselves.

Question: 09 January 2016

Car: Nissan -

Nissan Note Premium 64 Plate (2015) Will this fit on my car?


it will fit your car, the problem you have is connecting this to the factory screen as there is no input into that screen for reverse camera as far as our suppliers have

Question: 05 February 2016

Car: Lexus IS250 - 2005> -

Hey. I have a lexus is 250 2008. Would this fit my car if u bought also a in dash sat nav kit?


Hi This is a universal reverse camera it can be installed on any vehicle. Can work with any AV unit long as it has a camera input.

Question: 26 March 2016

Car: VW Transporter - 2005 > -

Is this camera compatible with Clarion NX501E Double Din SAT NAV All-In-One Unit With 6.2-inch Touch Panel?


hi there, yes any universal camera will work with the clarion nx501e

Question: 12 June 2016

Car: Mercedes C - Class - 2000> (W203) -

How and where would this camera be fitted to my 2005 post facelift W203. I have a Clarion NX404E unit thanks

Question: 06 July 2016

Car: BMW 1 Series (E81) - 2004> (E81) -

If I have a unit fitted that has camera input, what additional cables/wires, if any, would I need to purchase for this to work? Also can it be fitting so it will work only when in reverse? Thanks


Hi There, To fit the RVC1, into your BMW 1 SERIES, as long as your aftermarket stereo has a camera output you should need anything else as all wiring comes in the box with the RVC1 If you need this fitting in your vehicle or need further advise you can contact your local Car Audio Centre store directly for a full quotation and they will be happy to help you

Question: 02 August 2016

Car: BMW 3 Series (E46) - 1999-2005 (E46) -

Will this work with the original Bmw m3 double din screen?


Hi, Thanks for your question, to fit the RVC1 you would need to check to see if your head unit has a rear camera input.

Question: 22 February 2017

Car: VW Transporter - 2005 > -

Will this reversing camera fit the kenwood dnx 516DAB 7" screen navigation system wvga . Is the cable long enough to reach the unit in dash board or is the one that is Bluetooth .


Good afternoon yes camera will fit the DNX516DABS however this camera is a fixed position. Have a look at the PIONEER NDBC8 this camera is adjustable angle. DNX516DABS 7.0" WVGA Navigation System with built-in DAB tuner for VW Skoda & Seat ND-BC8 High-precision high-resolution universal reversing camera

Question: 18 March 2017

Car: Ford Kuga - 2008> -

Could you please tale if the audiovox rvc1 fixed rear view parking camera work with my clarion nx501e stereo unit my thanks need to know before I buy thanks


Hi, Yes the RVC1 is compatible with the NX501e. Thank you. RVC1 Fixed Rear view parking camera

Question: 05 May 2017

Car: Honda Civic - 2005 > -

Hello, will this work with my Pioneer AVH-270BT?if so how much would it be to fit it? There is a reverse camera in place (Honda OEM connected to redundant satnav) which would need to be removed first.


Hi The RVC1 is a universal camera can work with any unit. For installation cost contact your local store.

Question: 28 May 2017

Car: Renault Megane - Megane II 2007> -

Hi will this work with my Sony XAV-W650BT? Thanks


hi that's correct it will work with the Sony radio thanks

Question: 25 July 2017

Car: VW Golf - 2003 > MK5 -

Hi I've a Pioneer MVH-AV280BT and I understand this is a universal camera that will work with it, but I'm wondering do I need to purchase an additional cable or does this come with the camera?


Hi, thanks for your question, there is normally enough cable that comes with the camera. ND-BC8 High-precision high-resolution universal reversing camera

Question: 24 November 2017

Car: Honda Accord - 2008> -

I have a 2006 accord and I want to fit a reversing camera through my sat nav screen , if possible I want to also use my iPhone to play music through the cd/radio is this possible please .


Hi I would suggest you visit your local store.

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Fitting Services

Need help with Installation?

Here at CarAudioCentre we offer a professional and reputable fitting service in all our stores. For all fitting enquiries and bookings please visit or call one of our nationwide stores. Our fitters can install your new car stereo, DAB radio, audio visual, speakers, subwoofers or amplifier. We can also help to connect your iPod or MP3 player to you existing audio unit and can offer the best advice on the right in-car entertainment for your vehicle, to further this more we also offer a total 100% custom installation service for demo and show vehicles. So if you have an idea come on in and run it past us, the possibilities are endless and we are never too busy for an enthusiastic chat about our favourite subject.

Please note:

"That our two year warranty on products is only applicable to purchases made directly from us and that have been fitted in one of our stores."

Our Stores:

542 546 Mansfield Road, Sherwood NG5 2FR
Tel: 0115 9624 986
743-745 Eastern Ave, Newbury Park, London, IG2 7RT
Tel: 0208 599 2368
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Tel: 0208 971 9181