sub woofer in my e30

Post Mon Mar 04, 2013 7:50 pm

what way would be best to build a sub in my car because i dont want all the bass going out my boot lid haha but i cant have the speakers facing inside the car because of the metal and seat covering it up, or would that be the best way ?

Post Mon Mar 04, 2013 7:53 pm

knock the ski box panel out.....!!!!

Post Mon Mar 04, 2013 8:00 pm

alex_poulton wrote:what way would be best to build a sub in my car because i dont want all the bass going out my boot lid haha but i cant have the speakers facing inside the car because of the metal and seat covering it up, or would that be the best way ?

i though of that, guess ill just do it and see how it goes

thanks

Post Tue Mar 05, 2013 8:20 am

As far as I know, bass frequencies travel in all directions and have plenty of energy.

In the relatively closed space of the car, the sound pressure waves will have significant influence on the air in the car...and probably some of the solid framework too...so the sound will be comfortably audible.

I have a 12" Alpine Sub powered by a 300w RMS Mono amp (all is correctly power matched), and it delivers very nice bass inside the car, and because the sub is mounted in a closed box, for tighter, more realistic bass, the audio sound inside the car is great, outside the car, the volume is minimal, until you open the boot!

If you did want (for some bizare un-musicaly related reason) sound outside the car, you could make your boot a more lively resonating space by using a ported box for the sub...using it as a helmzholtz (spelling err) resonator...but this lacks bass clarity!

Hope this is accurate (is to my knowledge), and helpful!

Post Wed Mar 06, 2013 3:46 pm

Take your speakers out of the rear shelf and mount them in the rear quaters. Also knock out the ski hatch as mentioned above. The box should be mounted against the rear seat back sub firing towards the back of the car as its the rebound ypu want. Something like dynamatt is worth while to help keep the sound in the car and reduce vibration.

Post Wed Mar 06, 2013 9:53 pm

Dont mount them in the rear quaters, unless you got a vert, no point looks ugly and if you want it to look good a lot of re trimming would need to be done to make it look nice, which it still probably wont.

remove shelf speakers and leave the grills > so basically no speakers but grills that way it hollow but looks decent.

then bang out the ski hatch and get yourself a JBL sub in a box preferably ported and power it with a good amp. (only saying JBL because I used to have one which sounded decent in the way I have just described it above)

then you want the sub facing through the ski hatch, so basically pointing towards the inside of the car.

Should sound nice from this setup provided you got a good head unit.

And dynamat is expensive, if anything 800W RMS + you will hear rattling, so dont bother, just make sure your number plate and the surround is fixed firmly, might get noise from there and anything else loose in the boot.

with regards to running wiring should be straight forward. let me know if you need more info. As I did a boot build for my one and I know easy and safe secure ways to run wiring.