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How well does bass travel through back shelf

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Old 12 February 2006, 07:00 PM
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cookstar
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Default How well does bass travel through back shelf

On bug eye Saloon?

Am tossing ideas around re ICe and was wondering this as my mate has VW Passat with ice and needed to cut huge holes out of his shelf

Sorry if a bit ice newbie question


Cheers

Cookie
Old 12 February 2006, 07:32 PM
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scoobynut555
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Cookstar,

When I had my blob eye, I uprated the fornt and rear door speakers, run a 6 channel JBL amp and a infinity Kappa 12" sub and it wasn't stiffled at all, plus I have the amp and sub and wiring for sale if your intersted.

David
Old 13 February 2006, 07:20 PM
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GaryCat
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I have some spare Infinity speaker covers (5 1/4" and 6 1/2") if you need to cut holes and then cover them with something. The bass will sound woolly if you don't have some hole into the cabin.
Old 13 February 2006, 10:54 PM
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WRX_Rich
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2 PG 500w subs and a jl 1000w amp don't care whats in the way
Old 15 February 2006, 06:23 PM
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JockyTT
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You can install 6x9s under the rear parcel shelf (actually bolted under the steel) but if these are full range speakers then you will lose some top end unless you then cut holes in the shelf. Do not resort to cutting holes in the steel!

If you install a boxed sub in the boot then the bass'll get through pretty well, as Rich says.
Old 17 February 2006, 09:19 AM
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chiark
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Not very well, IMHO. Remove your back speakers and that helps.

or get a wagon
Old 17 February 2006, 10:37 AM
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NorthDownsScooby
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it seems to travel well from My "Fli Trap 12"... either that or is there some noisy bugger in the boot trying to escape !

Old 17 February 2006, 11:11 PM
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hades
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I found that a bit of careful use of a 3mm drill bit works quite nicely - I drilled a big grid of holes in the plastic of my back shelf over where the bass unit to my infinity components are mounted. Be careful not to twist the drill into the "fluffy" surface of the parcel shelf as that would rip it off; if it's still there, you'd never tell where the holes were unless you know where to look. Made a very big difference to the sound quality and amount of bass coming through.
Old 23 February 2006, 10:25 PM
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scoobnoob05
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bass in non directional....sooooooooooooo if the rest of your set up is good (Xoversettings are good..and levels balanced) wherethe bass is coming from should not be too noticeable.

the cabin speakers should present a good mix of bass (without booming or distorting) and the sub should just fill in the lower bits they miss (i.e the bits that make your throat/thighs and stomach vibrate when your in a club/ at a rave/ at carnival etc lol.

alas the scoob has very little sound proofing (prolly cos it weighs a lot) so the bootlid/ rear shelf / bumper and spare wheel well in particular will sing/vibrate its own notes as your effort to balance 'in' car bass continues.

DYNAMAT IS YOUR FRIEND (expensive friend by the box)

J
Old 24 February 2006, 07:39 AM
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ru'
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Not sure about bugeye, but the blobeye has a 'ski hatch' behind the centre arm rest I think. Could you not place the sub behind that, firing into the car?

I had that on a 406 I used to have, and it worked great.

Ideally I guess you'd seal the gap between the front of the sub box and the rear of the seat, but I didn't.
Old 24 February 2006, 05:59 PM
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SimonD
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Not sure about the bass not being directional. I have 6x9 subs in my rear shelf and it is very clear that the bass is coming from behind me and the rest of the sound from in front. I would have liked to put a sub under the seat but there really isn't enough space.
I imagine that this effect would be more pronounced with a sub in the boot.
Old 25 February 2006, 12:04 AM
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WRX_Rich
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Originally Posted by SimonD
Not sure about the bass not being directional.
I imagine that this effect would be more pronounced with a sub in the boot.
he should have said good base in not directional - when you go to a club you would never be able to point out the base speaker
Old 25 February 2006, 09:04 AM
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MickWrx
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I have got two 5 inch ports in me rear shelf (through metal) into the boot,

had to get in some aukward postions to make the cuts, but works a treat, kenwood 12" ceramic directly underneath and perfect sound distribution
Old 25 February 2006, 10:24 AM
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SimonD
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Originally Posted by WRX_Rich
he should have said good base in not directional - when you go to a club you would never be able to point out the base speaker


....aha! That's my mistake, I was going for bass, maybe base is what I want .

Seriously though, what makes for good bass and what is it that makes it good and non-directional?
Old 25 February 2006, 07:50 PM
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BigRed
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I've removed my rear speakers completely, my sub(RE SX12,ported 2.5cuft box) destroyed the OEM speakers that were fitted,thus they rattled like crazy, I have found the the bass is MUCH better now and no rattle(apart from the interior mirror, packed that with some paper!!)

Last edited by BigRed; 25 February 2006 at 07:53 PM.
Old 26 February 2006, 10:01 AM
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GaryCat
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Originally Posted by SimonD

Seriously though, what makes for good bass and what is it that makes it good and non-directional?
Moving large quantities of air, which is why sub-woofers are BIG and you need a decent amp to drive them.

Low frequencies are non-directional, you can't make it so, that's just the laws of physics.
Old 26 February 2006, 01:47 PM
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hades
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Originally Posted by GaryCat
Low frequencies are non-directional, you can't make it so, that's just the laws of physics.
The laws of physics say that low frequencies are no more or less directional than high frequencies. However, there are a number of other factors that do make it appear non-directional (to do with dissipation of higher levels of energy, and to do with the owkrings of our ears and our perceptions)

For example, it is possible to detect the epicentre of very low frequency seismic vibrations - which are often lower frequencies than your sub-woofers produce!
Old 03 March 2006, 08:14 PM
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ricardo_wrx
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Very interesing thread this..........

I have a sub, an amp, wiring, an idea fro a box, a drill, a jig saw and an ebay account.
All I need is the weather to warm up abit and a few free weekends and ill find out for myself if bass is directional? I think my neighbours might know which direction the throbbing is coming from??? Lol
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