Rear Seats, Trunk Design & Setup | Fundamentals ?
im looking design my car system from the ground up, but have it professionally installed.
- 2k Volkswagen Jetta
- 4 door sedan
- 8 speaker stock system
- rear split fold seats
- doors are equipped with power windows
- show & shine car
- amateur sound competitions [optional]
- ported enclosure
since the car will be a show & shine car, they system design must be astectically appealing. though i would like to have the option of entering amateur sound competitions, as shows often have booths for that now.
i would like the trunk to be designed in such as way, where it will be functional with the trunk open and also have optimum output. with this being said, the car needs to draw a crowd from the spl levels produced with the trunk open, and the doors as well. therefore a ported enclosure is prefered, with the subs and vent firing rearwards.
- 13 ft³ [specs from vw.com]
- largest box design - 20 x 40 x 40 - HxWxD
[20 x 40 x 40] was used as the largest boxed design to give everyone a rough idea of the size of the trunk. there is alot more usable spaces along the sides, and rear of the trunk.
i was looking to shoe horn as many subs in the trunk as i can. as in the show scene you must have a 'wow' effect to your car. so the more subs in the trunk the better. i was looking to atleast go 12 - 18 inch subs. my enclosure of choice would be ported, for the simple fact of drawing crowds at show & shines. sealed enclosures can be a second option.
my trunk is equipped with lifts, so the whole trunk can be used without worrying about anything closing down on enclosures. the only downfall is that i must have access to my rear lights.
- JL Audio 12W7 or JL Audio 13W7
JL Audio W7 series are my first choice, since they give me the best of both worlds [sq / spl]. i have an option of using earthquake for the simple fact that i can get them well below cost.
i am looking to atleast go 12 inches or bigger. the more subs in the rear, the better.
from reading the forums available online, i have read that you must seal off the trunk from the passenger cabin.
- how can i properly seal off the trunk from the passenger cabin?
ive seen people use plexiglass to seal off the access from the rear fold down seats. that would probably be my first option, as it will look the best.
- how can i properly seal off the rear parcel self, or is this really necessary?
- if this is necessary, can i weld off the little holes in the rear parcel shelf?
- would this be an effective way of sealing?
- what are my other options for sealing the rear parcel self?
another question comes to mind, if i do seal off completely, how does the sound eminate from the trunk into the passenger cabin? wont sealing off produce less sound in the cabin?
lets say i choose sub "X" from JL Audio, and its specs are as follows
now if i designed a box with the same volume, but different spec, how would this effect the sound of the sub? for example, if the box was designed as 12x12x48 intead of 24x24x24
now say sub "X" is recommended with an enclosure of
12x12x12 --> 24x24x24
what would the benifits of going 24x24x24 as opposed to 12x12x12?
if i choose a 12W7 or 13W7 speaker and fired them upwards, how far must them be from the upper wall of the trunk?
if i designed 2 or more boxes in the trunk [ie 1 sealed and 1 ported], would this effect the sound in any way, if so how? better yet, is it better to design 1 big box for everything?
I will be adding some pictures for reference...