Full Audio build

Knockoutpie

Hey Guys, I'll start off here i've always been an audio guy building my own boxes etc. I had a 98' Silverado where I removed the rear seat and put 2 15's in there and had the box tuned to 20hz, miss that truck! I had a nice audio build in my last 2 Camaros as well, but i'll start off here!

First off, the first thing I did to this car was put in a SPH-DA120 Pioneer Carplay Unit, best head unit by far from what i've owned and i've owned some head units that have cost 1500+
Compared to the Alpine ILX-007 the Pioneer option has way more customizing options and features to it, just putting that out there.

Front Speakers - Kenwood Kfc-P709Ps 6.5-Inch Performance Series Component Speaker System (These will probably get changed out later, but damn they sound good for what I paid)

Rear Speakers - Kicker 41KSC354 3-1/2 2-Way Coaxial Speaker (I chose these for the high RMS rating with the 4ch amp i'm using) These speakers are a bit large as in magnet size, but they fit, panel sticks off just a few hairs because of magnet size

Amplifier 4ch - Hifonics ZRX616.4 Zeus 4-Channel Class-A/B Car Amplifier, 600-Watt, I chose this amp because it's 75w rms Per channel, perfect for the speakers I have

Amplifier Mono - Hifonics ZRX1816.1D Zeus Mono Class-D Subwoofer Amplifier, 1800-Watt, I chose this because it will run 900w rms at a 2 ohm load for my Type R 10" D4 suwoofer

Subwoofer - Alpine SWR-10D4 Type-R 10" Subwoofer with Dual 4-ohm Voice Coils, This subwoofer is 1000w RMS at 2 ohm and max 3000w


Here I'll start, sorry I don't have pictures of front or rear installs but I decided to document the subwoofer box building fairly well.

My subwoofer box is ported, I haven't seen many "stealth" boxes for 370z with ports on it so here's a first!

I'll also upload dimensions if someone wants to replicate it! I'm not greedy it's a great box, to change tuning you can just use different pipe.

I'm sorry for the large pictures, I guess you'll just have to deal with it.

The box cost including the beauty boards probably cost me about $100 bucks and took a total of 6 hours to complete it. This includes MDF sheet, carpet, glue, staples, pvc pipe, t nuts.

I made 2x the cuts in case I found a local who wants me to make him a box ;] any takers in AZ?

First off, thank you to these 2 people, you gave me great ideas




Here's the dimensions for you more simple people



you'll need to use schedule 40 pipe, 3.5" is prefered but 4" will work, you just need more length on 4" for tuning purposes.

Knockoutpie

I'll start here with how I build the box, you already have the dimensions, I used 3/4 MDF, figuring how to mount it was a little tricky but I found a good way to do it without cutting anything, everything I did is fully reversible.


Building a box is incredibly simple once you get the cuts (home depot and lowes will cut wood for free fyi)


start with this first, put your board over the tire mount and smash it with a hammer to get an imprint and figure out where you need to cut it (easiest way for me)


wood glue is your best friend


i picked up this air powered staple gun for 5 bucks, works great, staple all the sides together after you glued, wait until sort of dry but not fully dry as you don't want cracks.


make your cut.


cut your hole out and use a 3" pvc pipe, this has to be somewhere around 2.5"? after put a 3" pvc cap on it and drill a hole in the middle of the cap for your tire mount.


glue, staples, and silicon, makes the box indestructible and make it so that your box is sealer and air won't escape besides the port!


I always use T Nuts for subwoofer boxes, you never know when you'll want a different subwoofer and you don't want to keep drilling holes, the port is on the side, it's the side with the most room possible.

Now this part was a little hard, ideally you need a piece of board 3.5' x 5' to trace out the trunk carpet and make your cuts, but I just have my Z so I improvised, you'll make due without me going into details.




Make your center subwoofer cut first to make sure the subwoofer hole matches and the boards fit snugly!!


this is after I finished carpeting, ideally i'd want the port to be in one of those holes but this will work just fine, each hole is a breather slot, makes it so the subwoofer box won't suffocate and the port can pull in air freely, seeing how it's 11pm at night, I don't have any speaker grill cloth, those holes will get covered tomorrow ASAP.

Knockoutpie

Amplifier locations, quite tricky in the 370z.... My subwoofer amplifierer was supposed to be 10x10x1, well it's 14x12x2 so it didn't quite fit where I wanted it to..


under the strut bar, trace it out, make indents for screw locations, drill it out, put cut around the 2 studs and puts nuts on them to hold the board down.


If you're going to do this, please please please use a 1/2 board and nothing thicker, it is a TIGHT location for an amp.






I had no where else to put this amp, it's not ideal, but with this behemoth I had no other option, it's behind the passanger seat, I used sticky velcro to hold it, I put screw fasteners behind the carpet, this is the gas tank area, do not drill holes to fasten amp!



No my amp will not overheat, I chose Hifonics because of the low operating temperature, they don't really heat up, this amp has ventilation on both sides when the bottom is sealed, it will do fine.


My next chore is to find a spare 370z trunk mat to cut a 10" slot out of it and throw it over all the beauty boards.

i'm a 23 year old, I could only work on this thing for 2 hours of the day because of my work times.

Let me know what you guys think,

charnathan

that is one clean and sick build!

__________________
2014 Nismo #0614 Magnetic Black (stock for now...)

Knockoutpie

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Here's the finished top. Speaker grill cloth around the vent holes and then I also cut and hemmed around the trunk mat. Added a little space because I ****** it up and had to cut it larger to make it perfectly circular, but it will work out because I need to add a grill anyways.

It's incredibly loud ☺️

Total spent. Less than 600 on everything (everything)

Jayhovah

Hopefully the grill will cover up the misshapen hole around the sub... very impressive build particularly for the cost. Gotta love DIY!

__________________
2013 Gun Metallic Sport - Gamma V3 Twin Turbogized
DIY Gamma V3 TT Install * Jayhovah's Gamma V3 TT Install Pic'Z and Vid'Z * DIY: Washer Reservoir for the Boosted

Knockoutpie

I found another trunk mat locally for about $20, might go
Pick it up. Doesn't look terrible though but it is a tad bit of an eye sore. Very hard to trace holes on carpet...

Jayhovah

I'm interested in how it works out! I am also planning a sub box (different design) that will necessitate a new or modified trunk mat.

__________________
2013 Gun Metallic Sport - Gamma V3 Twin Turbogized
DIY Gamma V3 TT Install * Jayhovah's Gamma V3 TT Install Pic'Z and Vid'Z * DIY: Washer Reservoir for the Boosted

Knockoutpie

image.jpg I messed up a little on the cut out so I had to cut it larger to make it a good circle. Seeee around the edges to reduce fraying also. Turned out pretty well! But I might make a new one with cleaner cuts.

Nixin

Bravo, bravo!!! That is quite some nice work there KOPie.

Knockoutpie

image.jpg
I did the same type of box for my brother 350z. He has an 8" L7 in there. Ported box as well.