Where's the Bass ?

[CanberraR33]

I have a Kicker 12" sub in a sealed box run off the small Coustic 4ch amp.

I had the same system in my last car (a 2001 Astra) and yes I got more bass. In the Astra I had the sub facing into the car with the box all the way to the front of the boot (next to rear bumper). If I wanted more bass all I had to do was fold down the ski hatch! :lol:

With my Skyline I have it facing out up against the false wall. I would say the bass now is better than I had in the Astra. Mainly 'cause I have spent a heap more time adjusting settings!

Have you thought about putting some extra holes in ya parcel shelf and then covering with speaker grill? Might let a bit more sound through. I wouldn't remove the metal plate though!

[BOoStEr]

If I cut a 230mm hole in the centre of the metal plate and sandwich the plate between the sub and the box (see post #18) using 6mm screws and T nuts the car's structural integrity won't be comprimised at all. Legal? Well..... N.S.W. blueslip inspector said he wouldn't have a problem with it but if I wanted to be 100% sure I could get it engineered.

[paulr33]

R33's have hardcore sound dampening particulary in the boot. The VL was probably one of the worst examples of sound dampening. You just need a good setup to focus the sound in the car rather than trying to push it out the car and to everyone else around the car

[XCUZME]

the bass is always louder in a hatch.

its because of the loading and the boot size.

you'll never get the setup to sound as loud as the hatch. youll probably have to give it twice the power to catch up

but still, try and face it in a different direction to get some more out of it, you might get an improvement

[BOoStEr]

If you look at the cabin of a skyline as a compartment of a certain volume, how is it fundamentally different to the cabin of a hatch of similar volume? Apart from the limited loading options of course. Wouldn't aiming a sub through the armrest of a skyline (sealed through the metal plate) perform similar to a forward facing sub at back of a mid-sized hatch?

[eliter33]

the reason subs always sound better in a hatch is the dynamics of the interior, eg sloped rear window from which the bass rebounds straight off into into your back, whereas in sedan it will try to bounce either off the boot and through the seat into the cabin or, just try to get through the seat and into the cabin depending on which way you have it facing. so basically; with the gear that you have it will never sound as good as what it did in your hatch. you will have to change gear if you want more bass or just add another sub.

as for ported or sealed; 15" subs work very well in aported enclsure usually for the fact that that is what they are most commonly designed for, loud low chest turning head ringing bass!!! the fact that they are ported allows the sub to hit much lower notes, but it wont hit you as hard as a sealed enclosure. so when using a 10 or 12 inch sub they cant go quite as low a s a 15" so we generally seal them so that they will at least hit you hard

[paulr33]

Which way are you subs facing? I have two 12" aplines facing outwards, towards the ass end of the car and the bass is INSANE. Trying facing them away form the back seats instead of at them.

See how that goes

[siksII]

I have placed a 12mm mdf board flush with the panel you are speaking of removing(in front of battery) on which my amps and wiring are mounted.. i bet it would be heaps louder without it!

I didnt even think of that when i installed it

[paulr33]

Probably not. What way are your sub facing? Towards the back seats? Face the sub outwards, as in facing your tailights.

[paulr33]

Like this

[siksII]

yeah i have tried each way, and it is loudest when facing the rear of the car, which is how it is. I used to have a hatch, so at first i was annoyed at how much softer it was

[paulr33]

no problems from me. ive got 2 x 12"s facing outwards and theres more bass/loudness than 2 x 10"s that were ported

what amp do u have running the sub? what sub is it? brand?

[predator]

hmmm..

It can vary I think depending on sub/box/etc (mine is sealed) 12". At first I pointed my sub back as many suggested, and it didn't sound so hot, then i pointed it forward and it sounded nice and loud but it gave a very annoying harmonic buzz in the the parcel shelf (one day i'll build a parcel shelf/sound deaden, etc, but not now)..

Then i moved it to the rear, facing at about a 40degree angle. The buzz is gone and still nice volume. So that for me and my setup seems to be the best for me.

[siksII]

I have a pioneer gmx542 from memory, bridged it provides 150WRMS, powering a JL 12W-0, in a ported enclosure.. its reasonably loud... but it was VERY loud in my old hatch

[Fhrx]

I see you're in NSW.

Before you do anything at all please bring it to us so I can diagnose it for you. We usually insert small 10's under the shelf next to the battery and that gives people plenty of bass so I'm assuming there is something going pear-shaped with your sub and / or amp.

[mtopxsecret6]

Im just curious as to how the metal insert in the back seat/wall is a 'structual' item? i have removed mine completely and fitted two 10inch mtx subs in a free air setup. The metal plate is light bendable and flimsy. And simply just bolts on, not under pressure from exerting forces etc? This seems rather interesting to me.

[sliksilvia]

adjust the gains on ur amp mayb

[Frosty]

dont forget the size differents in the car also....maybe a new box......i had a 10" in an excel which the box was designed to firesideways :s put that in the skyline and you get nuttin at all

depends on the way you have it setup and what is was really desgined for.........dont cut the wall out bad idea just get it tuned and a new box

youll be sweet