R35 GTR Diamond Audio System Gen6 (2009-14)


This item is for a turn-key system designed for 2009-2014 R35 GT-Rs to upgrade from the factory Bose subwoofers. This is a direct plug and play replacement with no wires needing to be cut or holes drilled. This particular system is equipped with the newly acquired Diamond Audio DES82 subwoofers that produce an accurate and very punchy sound. Thanks to the woven paper fiber reinforced cones and eight screw basket, these subwoofers seal extremely well to the enclosure and have minimal cone flex. This results in a pure and and undistorted sound even at the highest of volumes. The Diamond Audio system is a potent option that offers fantastic value for those looking to significantly improve the bass and add some carbon fiber to their GTRs. 

Housing the subwoofers is the newly updated Gen6 Slope enclosure. The Slope enclosure is a hybrid stacked fabrication design with raised mounting rings. The stacked fabrication design enables greater internal volume, a stiffer front baffle, and reduces weight. In this design, the subwoofers are not recessed into the box, but instead raised rings are added to build and contour the enclosure around the subwoofers. Each internal stack is routered at 45 degrees to improve airflow and reduce sharp corners. The outside of the box is meticulously hand-sanded to result in a beautiful shape. Overall, the slope box is 5lb lighter than the regular curved twin box, is stronger, and has more internal volume with less air turbulence. The enclosure is finished with gold hardware, gold terminals, and a 1/4″ layer of high-density foam with upholstery that is nearly identical to the factory GTR interior. A rear centre console cover and rear deck cover is included to carry the OEM stitching from the front arm rest, through the rear console, and onto the subwoofer enclosure.

In terms of the power supply, the amplifier, processor and all connections are completed and neatly assembled on a 3M carbon wrapped amplifier rack. The wiring extends through a factory hole and connects directly to the factory Bose subwoofer plug for a true plug and play experience. The amp rack bolts to the back of the box using an in-house CNC manufactured stacked fabrication mounting plate. Threaded T-nuts are used for a nut and bolt type assembly. The mounting plate is reinforced with dowels to ensure structural rigidity even in the most powerful or track oriented GTRs. 

Everything you need for the install is included, with the exception of tools. The install time takes approximately two hours depending on your install ability. This is a plug and play style install. All bolts match up to factory bolt locations, no wire cutting is required, no holes need to be drilled, and the front seats do not need to be removed. The amplifier will be sent pre-tuned to sound great as soon as it is installed. Tools required for the install are a flat screwdriver, 10mm socket, 14mm deep socket or wrench, and 4mm Allen key. This kit includes:

  • Xtreme Audio twin 8″ sealed Gen6 Slope subwoofer enclosure
  • 2 Diamond Audio DES82 subwoofers
  • JL Audio MX500 amplifier
  • LOC90 line converter with gain control
  • Amplifier rack
  • Pre-built plug and play wiring harness
  • Enclosure mounting brackets and hardware
  • Rear console cover
  • Rear deck cover
  • Colour printed comprehensive install manual

Out of stock




 Technical Specifications

  • 500 RMS watts (continuous power handling).
  • 11mm excursion
  • 80.6db sensitivity
  • 203cm^2 Surface area (per sub)
  • 2 ohm load
  • Gold plated speaker terminals
  • 10 gauge pure copper speaker wire


Please see the comparative sound chart below. Note that the phrasing is very generalized and the performance and sound quality are excellent for all options. There are however slight differences between the final sound of each system as a result of the different technologies that each subwoofer manufacture uses such as their cones, venting, magnets, etc.


Additional information

Weight 45 lbs
Dimensions 24 × 12 × 12 cm