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Discussion Starter #1
Well in an effort to get better bass impact up front I'm looking to install an 8" Elemental Designs 9kv.2 in a custom sealed fiberglass enclosure where the dash center console once lived.

Here's a pic with the console removed:



I'm going to be relocating the vents, heads up display, and pushing the headunit down to the bottom of the stereo bezel where the 'CD Pocket' lives.

Should be a fun project. The sub will be fed by my Alphasonik @ 300watts RMS.

Stay tuned for more mock-up/cutting/fabrication.
 

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Discussion Starter #3
All depends on what I discover during mockup. I'm going into the project with the thought of aiming the baffle below the surface of the dash, and putting a stealth trim/grill piece over top to make it appear stock.
 

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Make an enclosure. attach to firewall. Drill some holes in the firewall and run it infinite baffle so you get better low end response.
 

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Discussion Starter #5
Make an enclosure. attach to firewall. Drill some holes in the firewall and run it infinite baffle so you get better low end response.
:lol: While IB does sound fun.. I doubt with that huge metal cross member support I'd be able to touch the firewall.. nor would I want to cut a hole in my firewall connecting the cabin to the engine compartment. lol. Tis a daily driver.
 

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If you can seal off the underside of the dash really well, you could also get away with using a variovent behind the speaker.
 

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Discussion Starter #7
Ya that is an idea. If I have the sub on 2 extreme planes I might be able to keep the waves separate enough to fend of cancellation. Should be a pretty good separation if i was to vent on the back or bottom side. Have a source for such vents?
 

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This is going to be interesting!

I've never seen those aperiodic vents before..Really interesting.. i might incorporate one of them in my build.
 

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tuning in for this build... i really liked your last one as well.

have you thought about larger midbass drivers up front? I'm not sure exactly what you are looking for, but if it's "impact", a lot of that is from the midbass frequencies
 

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Discussion Starter #15
Possibly but I do like the idea of killing 2 birds with 1 stone. If I can take the sub up to about 120hz... that will take alot of weight off my midbasses.
 

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i'm not sure how much you have played around with different frequencies and such, but if you ever want to identify the area that you feel you are lacking, get an amp, plug in a sub or midbass speaker, play your favorite "midbass"y track, and as it's playing, swing the lp filter up. if you pass 120 and it's still not "punching" you like you think it should, then you are focusing on the wrong frequencies.

i know you are not focusing on the elusive "midbass" frequencies, but when you say you want "better bass impact up front" i think the same thing. however, I don't feel it'll come from a sub. but that's just my opinion.

i have watched your build log previously, and can't help but think that the weak link is not the sub, but rather your choice of midbass drivers. i have never heard them, so this is just conjecture, but two drivers with that little cone area can't possibly give the midbass "punch" that you would expect in those frequencies.

i'm not trying to crap all over your thread and idea at all, i think this will be cool if you go through with it. however, before I would go through the relocation of vents, fiberglass, moving radio and ac controls, etc, i would attempt to get more cone area in your midbass region...

just my .02 cents :)
 

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Discussion Starter #17
Possibly correct. The midbasses I selected while having a smaller cone area (I already owned them) have a long xmax. They can move a bit of air. Being crossed over from 80hz to 450hz gives them a decent sweet spot. I have played with the eq a bit and some tracks have more punch than others... But anything over 80hz @ 18db I can start to localize the sub. About the 120hz crossover point is when I can start to feel in my back the area I'm missing. So maybe it is in the bottom of the midbass range.. But an upfront sub can't hurt.. Will I swap out the midbass for the 6.5" version in the future? Possibly. Lol.
 

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i'm not sure how much you have played around with different frequencies and such, but if you ever want to identify the area that you feel you are lacking, get an amp, plug in a sub or midbass speaker, play your favorite "midbass"y track, and as it's playing, swing the lp filter up. if you pass 120 and it's still not "punching" you like you think it should, then you are focusing on the wrong frequencies.

i know you are not focusing on the elusive "midbass" frequencies, but when you say you want "better bass impact up front" i think the same thing. however, I don't feel it'll come from a sub. but that's just my opinion.

i have watched your build log previously, and can't help but think that the weak link is not the sub, but rather your choice of midbass drivers. i have never heard them, so this is just conjecture, but two drivers with that little cone area can't possibly give the midbass "punch" that you would expect in those frequencies.

i'm not trying to crap all over your thread and idea at all, i think this will be cool if you go through with it. however, before I would go through the relocation of vents, fiberglass, moving radio and ac controls, etc, i would attempt to get more cone area in your midbass region...

just my .02 cents :)

I agree
No replacement for displacement.
I would never run a sub regardless of location past 90hz-thats getting well into bass/midbass regions where there starts be to some stereo separation.
 
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