11 Year Build "The DJ Car" - Custom Subwoofer Enclosure **Advanced Knowledge Req**

[thedjcar]

Hey Guys! I need some high level assistance to point me in the right direction.. I'm not looking for design blueprints - I'm able to make them, I just need guidance for the utility I require.

 

If you're going to talk shit, please save your breath, I won't respond. I get enough of it on the daily.

 

Over the last 11 years I've built and rebuilt a mobile performance stage out of a 94' Lebaron Convertible that BOOMs aka LeBOOMN - "The DJ Car". Background in mechanical, electrical and audio engineering. I grew up building muscle cars with my pops and then I got into music. Gear head + bass head + nerd.

We are not terrorizing or disturbing the peace - This is part of a non-profit called Heartheart Foundation aka Hear The Art. We do a ton of non-profit work with the City of Miami, Make-A-Wish-Foundation, Nicklaus Children's Hospital, Kids w/ Cancer, etc

 

After learning about the "Infinite Baffle" design, caused me to deep dive into sub enclosures to figure out the best way to use the space I have in the trunk and quickly found out that it's not the best use of space for my goal.

 

Main goal: I'm going to seal off the entire trunk completely from the inside passenger area of the car, as well as the exterior where the trunk opens - and my goal is to create an enclosure for the subs that will probably be ported out the floor of the trunk for the SOLE PURPOSE of everyone surrounding the car to feel the bass as if they were at the front stage of an EDM concert.

 

 

My current sub is in a ported enclosure tuned to 32hz with a Sundown Audio X-12v3 D2, which slaps super hard for people INSIDE the car, but sounds like shit for everyone enjoying the experience.

 

I was told that a high order bandpass ported to the exterior under the rear would be best, but I've also been told to use a folded horn sub enclosure ported the same (needs XXL space.. eh) and I want to know my best options here.

 

Since this photo, the trunk has fully been covered, first with second skin, then with 80mm sound deadening mat.

 

 

 

Requirements:

1. Feel the bass OUTSIDE of the car at the rear (please understand the convertible does not matter as the trunk will be COMPLETELY sealed off)
2. As loud and chest shaking as I possibly can fit
3. I have to consider audio delays for listening purposes (higher orders = higher delay hearing sound)

 

I'm down to cut and fabricate anything and everything in the car to make this thing SLAM

 

Restrictions:

1. Trunk space is about 250L

 

Currently have in my possession (for a cheaper build if doable):

• 1 Skar Audio RP-2000.1D Monoblock
• 1 Skar Audio ZVX-12v2 D1 Sub ((t/s specs)
• 1 Sundown Audio SALT-2 Monoblock
• 1 Sundown Audio X-12v3 D2 (t/s specs)

 

Questions:

• What type of enclosure should I be aiming for and why is it the best one? 
• Is 1 bigger sub (18") better versus 3 x 8" subs?
• What key t/s should I mainly be focused on for this enclosure and why?
• What size should the exterior port be? Is there a specific ratio? (I've heard 1/2 of total subs Sd)

 

Much love and light to everyone and their crazy builds! 

 

-Dray

 

[Joe X]

There is no car cabin gain outside a vehicle and therefore you can never get the same level of bass at all with the same equipment, so there is only one way to go about it and that is gobs power and cone area.

 

Look into the Brazilian "Open Show" scene to get more infos and ideas, but I wouldn't try such a system in a trunk car, it's better to use a truck to build those high ratio 4th order bandpass boxes to get the lows outside really good:

 

Here is a video from one of those Brazilian audio companies, you can see the camera filming being hit by the bass

 

 

 

 

[madeforthis]

Sounds like an awesome project! wish I had the skills to build something like that!