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2018 golf R - upgrading "Premium" fender audio system


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Did some searching for rear door "Filler" speakers. From what I have seen in photos online, rear OEM tweeters are marked 20W RMS so I assume the woofers are 20-30wRMS as well - magnet on the woofers are pretty small (again from online photos I saw)

 

Trying to keep the budget under $150-160ish CAD for the rear components, and also looking for at least 55-60wRMS to ensure I don<t blow speakers with the Pioneer amp (100wRMS at 4 ohm per channel, but I would keep it down vs the fronts)

 

here is one I have found that may work;

Hertz DSK130.3 : https://www.crutchfield.ca/p_301DSK1303/Hertz-DSK-130-3.html?tp=73303

 

A little rmore pricey option - Alpine S65c; https://www.amazon.ca/Alpine-S-S65C-6-5-inch-Component-Speakers/dp/B079G6CZF7

 

Now, I could also just disconnect the rear door tweeter and go with a pair of 5.25 or 6.5 inch coaxial speakers, for example;

 

Polk Audio DB522 (100wRMS; https://www.crutchfield.ca/p_107DB522/Polk-Audio-DB-522.html?tp=73305

 

I could also move up to 6-inch or 6-1/2in speakers - they fit with little modification (oem are 6-inch, other owners have been able to get 6-1/2in aftermarket in with light adjustment to plastic at one corner on door plastic);

 

 Kenwood 6-1/2 coax: https://www.crutchfield.ca/p_1131696PS/Kenwood-KFC-1696PS.html?tp=78076

 

Alpine type S coax; https://www.bestbuy.ca/en-ca/product/alpine-s-s65-6-1-2-2-way-car-speakers/12381135

 

 

2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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  • 3 months later...

just wanted to update this thread as I have been getting to work.

 

A few changes have been made to my setup. Most importantly, decided to go active up front, as I found an awesome deal on a Zapco DSP from a Canadian member on DIY mobile audio forum. 

 

Here is the current list of equipment I have in my possession;


Front stage: JBL C508 GTI - 5-1/4inch component set from previous build
Rear fill: Kenwood KFC-1696PS coax (purchased new for this build)
Subs: 2x Pioneer low-profile TSZ10LS4 10-inch subs (400w RMS each)
Mono amp: Clarion DPX11551 - 850 watts RMS x 1 at 4 ohms (1,550 watts RMS x 1 at 2 ohms)
4-channel amp (front midbass and rear coax): Pioneer GM-D8604 - 150W x 4 at 2ohm, 100w x 4 at 4ohm, bridgeable.

2-channel amp (tweets): Pioneer GM-A3702 - 2-channel amp, 60w RMS x2
DSP: Zapco DSP Z8 IV - purchased new in box from another member on here - my first DSP so very excited!
Wire: 0-gauge OFC kit from Crutchfield
Other: fast rings for speakers, two Knukonceptz BASSIK distribution blocks, 54 square feet of Noico sound deadening.

 

First up was sound deadening the trunk:

 

Before:

 

IMG_0473.thumb.jpeg.3c53cf6d6494b0377165e7a6933cea5c.jpeg

 

 

After:

 

IMG_0474.thumb.jpeg.7290a662c0c78c10c3c03522da09701f.jpeg

 

 

IMG_0477.thumb.jpeg.ca6ef64c976b02635a5f78aedc4d7654.jpeg

 

 

I also applied some to the trunk hatch itself as well as the hatch plastic panels to minimize any vibrations there;

 

 

 

IMG_0490.thumb.JPEG.5b1128e5f785defdf3ee27967e3e6f01.JPEG

 

IMG_0491.thumb.JPEG.b8d1cb87e17cc4f42025d422f2065d46.JPEG

Edited by BboyTaktix

 

2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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Next - had to get to work on copying the profile of the trunk using cardboard, in order to create a template for the sub box and beauty panels;

 

IMG_0467.thumb.jpeg.cb6a1173a879d845748577c9475aacc5.jpegIMG_0468.thumb.jpeg.562bf56f2e0c84bfbddf314ba9ecc4f6.jpeg

 

 

after a few hours of measuring, routing, setting up template pieces, adjustable curve, I finally got a clean template for the subwoofer box top, which matches the profile of the trunk.
Adjustable curves with the router are great but definitely a learning process. I had to put two layers of template tape to keep it far enough away as to cut the entire piece of 1/4 MDF, while also ensuring the adjustable curve itself would not be cut by the bit. But very handy for making odd profiles. Also, electrical tape on the top of the curve is a must to keep it locked in place as the bit moves across it.

 

 

Here’s the finished template - I cut it about 16 inches back because I only need the front section for sub box. Rear part will be for the amp rack cover, will be finalized more down the road.

 

 

IMG_0521.thumb.JPEG.20c1fbe8c083fe0f151ef6adcdf05add.JPEG

 

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2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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Some more progress on the subwoofer enclosure today. Finished the template for the bottom and did some trimming, finishing work on bottom piece. This will be a relatively intricate subwoofer enclosure, so taking my time since fitment will be important in the floor - making using as much of the space as I can. I will need to finish the enclosure before I start on the amp rack to see exactly how much space is left over under there. Here are some photos:

started with making a cardboard template (thanks extra thick cardboard from new hot water heater delivery!)

 

IMG_0525.thumb.JPEG.871c2b97379ea426b091f8dc3164722b.JPEG

 

transferred over to a 1/4inch HDF piece, using my top of floor template to match the curve with bottom. I then modified my other bottom piece as well to get clean lines and curves, then 45degree chamfer to help it fit into place easily;

 

IMG_0533.thumb.JPEG.a0b6d0bae683c6c14f6f6f98343cb50c.JPEG

 

Made a bottom center piece as well to go under that - this way I get extra air space in the box - from my calcupations, it gives me something like 210-230 square inches extra of airspace;

 

IMG_0535.thumb.JPEG.743aea7d96e13cc256eb4714fdb45f1e.JPEG

 

 

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IMG_0541.thumb.JPEG.90e660ed39157748c5a0f99280624af1.JPEG

 

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2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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Picked up some more supplies today as well;

IMG_0553.thumb.JPEG.f36e8144bd9f3544d636c914beabad67.JPEG

 

IMG_0554.thumb.JPEG.8fa868c9828a50c904b1c0ec6b42ed58.JPEG

 

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2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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Used the bottom of the box template to finally cut the 3/4 inch MDF piece out;IMG_0568.thumb.JPEG.65c5a66f5eb858f4242d6c68b48994d9.JPEG

 

IMG_0569.thumb.JPEG.4354ff371faf8e3cc597030bc3f1379b.JPEG

 

 

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2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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Next is the front wall - since the shape is so intricate, I am using a stacking method - the first piece was the hardest to make using several different methods - but once complete, it was just a matter of stacking, glueing + brad nailing each layer then copying the profile with the edge trim router bit, one at a time. I need 5 layers total to make up the 4inches of height of the box (not including the top and bottom) - here some pics of the process:

 

IMG_0572.thumb.JPEG.b11ea119c195d30c300630f8a20a39a7.JPEG

 

IMG_0579.thumb.JPEG.f969e608d9172e13b2e15a9c4725741b.JPEG

 

 

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IMG_0582.thumb.JPEG.c1eacc3c28fb084f34af740efd405b1a.JPEG

 

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2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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Next was to begin assembly of the box - starting to look like something... 😁

 

 

IMG_0674.thumb.JPEG.a842499d48829411bafe215d5fae0af8.JPEGIMG_0675.thumb.JPEG.4fd72bbb3127a320c3801810fb01e3ae.JPEG

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2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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and some more progress...got all sides and bottom layers glued up...

 

 

IMG_0681.thumb.JPEG.ebd97859302095cddcee4b1ac89ac9ae.JPEG

 

 

IMG_0682.thumb.JPEG.3782381a78131ec0fb67a99fd02d627d.JPEG

 

 

 

Dowels in the corner to give it more strength at those locations, and also help to better seal those contact points of the walls. 

 

 

IMG_0683.thumb.JPEG.2bf6338068813a8c4abb855c430faae1.JPEG

 

 

 

 

 

Fitment in the car is looking REAL good to me;

 

 

 

IMG_0676.thumb.JPEG.c0f20f59b5861b03641897d87e85e299.JPEG

 

 

IMG_0679.thumb.JPEG.34ffa2404ce7789e026e0171e47c3fde.JPEGIMG_0680.thumb.JPEG.331b1f6d49c41bccc4df9428e8199a50.JPEG

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2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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Added a center brace to prevent any flexing;

 

 

IMG_0717.thumb.JPEG.ece00aa9b9919e965fa767fd72c0f5a1.JPEG

 

 

IMG_0718.thumb.JPEG.ea3857a4315b4dcdf4c252446b3674f5.JPEG

 

 

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And of course the final product was given a nice roundover to make it aesthetically pleasing!

 

 

 

 

IMG_0724.thumb.JPEG.bcc11d8f4d874c8834596d0c361cc629.JPEG

 

 

IMG_0723.thumb.JPEG.de787a1cd26145da184c2ecb87dbf418.JPEG

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2018 Golf R - Stealth SQ system build - C508GTI front (active), 2x Pioneer Z10LS4, Zapco DSPZ8, Clarion DPX11551 (Mono amp), Pioneer GM-D8604 (front stage amp), Pioneer GM-A3702 (rear fill amp)

SOLD! 2011 Subaru STI - 'modest' passive sq system - JBL p660c component (front) JBL P662 (rear) JBL W10GTI (sealed enclosure) 4ch JBL GO1004 (150RMSx4), Clarion DPX11551 mono amp ([email protected])

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