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General => Car audio => Topic started by: Dave_IOW on 09 December 2009, 17:33
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Right, im going to put door speakers in over christmas, (thanks santa) and just to confirm really, i take everyone has routed all four door speakers back to boot to run amplifier?
Seems along way to route front door speakers back and also, if run down side trims, inevitably there will be a power cable down one side so wont front speakers get the whining sound under acceleration being too close to power cable? (Not sure of technical term but ive had it myself before.)
And from searching forums, can someone please confirm that all four door speakers are 17cm?
Any advice guys?
Dave_IOW
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The boot seems the best place to put the amp as i don't think there's anywhere else really unless you can fit one under the seats..
You won't get whining as long as you run the power cable down one side & the RCA's down the other. For the MK4 the speakers are 17cm.
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Thanks, thought it was right, just havent bothered with any front door speakers on any of my previous cars..
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Np.
This is just my opinion but i don't think it's worth upgrading rear speakers, there just there to fill in the noise & i could be wrong
but i don't think you'll notice any difference over stock. (with upgraded fronts)
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You won't get whining as long as you run the power cable down one side & the RCA's down the other.
nice to know you are so sure. :grin: :grin:
Power cables and RCA's next to each other will not create interference, it is an urban myth which it looks like will never be dispelled at this rate.
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You won't get whining as long as you run the power cable down one side & the RCA's down the other.
nice to know you are so sure. :grin: :grin:
Power cables and RCA's next to each other will not create interference, it is an urban myth which it looks like will never be dispelled at this rate.
When i done my first install, every guide said to run them at opposite sides. I've never had a problem so jobs a guddun.
:grin:
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You won't get whining as long as you run the power cable down one side & the RCA's down the other.
nice to know you are so sure. :grin: :grin:
Power cables and RCA's next to each other will not create interference, it is an urban myth which it looks like will never be dispelled at this rate.
When i done my first install, every guide said to run them at opposite sides. I've never had a problem so jobs a guddun.
:grin:
can mean a lot of extra work for nothing, if the carpet is up as it is then no harm, there is however the same chance of interference either way :grin:.
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What exactly does cause the interference then? I have had it on a couple of cars, is it just my dodgy wiring?? :rolleyes: :grin:
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What exactly does cause the interference then?
could be loads of things ( including dodgy wiring :grin:)
If separating your RCA's from your power cable fixes the problem then it is because you moved the RCA's, nothing to do with the separation of the two. What I mean is, If you moved the power cable along with it then the interference would still be gone.
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Ive run four speakers by running all your speaker cables down one side and up to the headunit wiring. Just connect them back to the speakers. Only disadvantage is you will be running off the stock wiring which is quite thin.
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as for confirming the speaker size you may need to tell us what car you have :)
If its a mk3 then the fronts are 6.5's and if its a cabrio then the ones where the rear doors would be are 6.5's too. Not sure about the size of the rears in a non cabrio, or if they even have them.
EDIT: but to confirm what madmax says, there is no point doing the rear speakers at all, spend more money on the fronts, or getting the fronts fitted in better thus improving their performance.
Fitting the front speakers in properly will likely more than treble their output, if you get it right of course.
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In in a mk4 mate.
I take it by properly u mean dynamatting?
Just had a go at getting the amp cable through today after looking at many guides, and still can get the buggar through :cry:
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In in a mk4 mate.
I take it by properly u mean dynamatting?
Just had a go at getting the amp cable through today after looking at many guides, and still can get the buggar through :cry:
yeah the power cable is a bit of a PITA on mk 4's. behind the glovebox is the best place IIRC. Thats why you want a MK3, there is a huge grommet big enough to fit a drainpipe in on these badboys :)
by properly I mean fitting the speakers to metal of the door, rather than just the door pockets. This gives them a ridged baffle to play from, try installing a speaker in a cardboard box and compare it to a wooden box, you should hear a difference.
Also, I don't know if you have ever taken a doorcard off a car door but the part where the speaker plays into is full of holes from the inner skin back into the doorcard, this means these holes also get to the outside world ( kind of) as the doorcards are not sealed airtight to the door. Sealing these holes up with either some kind of sound deadening or preferably something more solid would also go a long way to increasing the front speakers effectiveness. The idea is to make the door more like a box, which is what you want.
sound deadening the whole door is also a worthwhile step, just be careful not to block up any drain holes in the bottom of the door. There are better/more cost effective methods than dynamat out there.
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Yeah taken a few door cards off and know exactly what you mean, although never really thought creating a 'box' in the door would make that much difference but will definately be trying this when i finally get some time off work :wink:
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never really thought creating a 'box' in the door would make that much difference
oh it does ;)
have you ever ran a speaker on its own? no box, no door card, nothing?
If you have then you will know what I mean. The (bass)output is next to nothing because ( for one reason, but there is more) the front and back waves from the speaker are not isolated from one another, sealing up the door serves this purpose.
It will be most effective when the speaker is also fitted to the metal of the door though as you will be able to get a good seal, whereas when fitted to the doorcard you can't really. Fitting to the metal of the door also serves another main purpose which I mentioned above.