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  1. #1
    Join Date
    Jan 2004
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    Speaker Install

    Attached is a diagram of my trunkspace, and here is a description and my problem. I have 2 Rockford 8"s and 2/1* Kicker Impulse 12"s that I only have room for in the trunk. Right now, they're in truck boxes, and I intend to Build a box(es) to house the speakers so they can face the front. What should I do, and what shape/how big/what orientation should the box(es) be?

    *the amp that runs the 12"s had a resistor fall out and I haven't got around to saudering it back in, so it's one channel now, and I can't even bridge it to get the full power
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  2. #2
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    Dec 2003
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    Quote Originally Posted by Doza
    Attached is a diagram of my trunkspace, and here is a description and my problem. I have 2 Rockford 8"s and 2/1* Kicker Impulse 12"s that I only have room for in the trunk. Right now, they're in truck boxes, and I intend to Build a box(es) to house the speakers so they can face the front. What should I do, and what shape/how big/what orientation should the box(es) be?

    *the amp that runs the 12"s had a resistor fall out and I haven't got around to saudering it back in, so it's one channel now, and I can't even bridge it to get the full power
    Chamber design is a complex subject and I was going to suggest you search on "speaker horn design" for some of the basics on building a loaded horn cabinet. This will produce astounding bass colume AND clarity from a small volume and can be accomodated in unusual spaces. The problem is it's not easy
    Anyway, I did the search myself and found that someone has done all the maths in an applet. You might want to try to use it to get you the optimum design for the speakers and space available. http://www.ishtek.com/spkrs.htm it also has a 'basics' intro page.
    I've seen lots of folks stuff speakers in anywhere and then use smart electronics to make it sound reasonable. I prefer getting the design as near correct as possible and then ONLY using electronics when and if necessary. ( I used to do semi-pro live and studio recordings so I prefer 'real' sounds )
    Hope it helps.
    Of course, the easier approach is to go along ot the next sound-off and see what someone else has done and if you like the sound/look copy it

  3. #3
    Join Date
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    Quote Originally Posted by Matra et Alpine
    Chamber design is a complex subject and I was going to suggest you search on "speaker horn design" for some of the basics on building a loaded horn cabinet. This will produce astounding bass colume AND clarity from a small volume and can be accomodated in unusual spaces. The problem is it's not easy
    Anyway, I did the search myself and found that someone has done all the maths in an applet. You might want to try to use it to get you the optimum design for the speakers and space available. http://www.ishtek.com/spkrs.htm it also has a 'basics' intro page.
    I've seen lots of folks stuff speakers in anywhere and then use smart electronics to make it sound reasonable. I prefer getting the design as near correct as possible and then ONLY using electronics when and if necessary. ( I used to do semi-pro live and studio recordings so I prefer 'real' sounds )
    Hope it helps.
    Of course, the easier approach is to go along ot the next sound-off and see what someone else has done and if you like the sound/look copy it
    Thanks... I don't have much extra money to make it much better now, but plenty of wood laying around.
    Stickers add horsepower. I promise.

  4. #4
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    I remember that one of the BC MR2 club guys had what he called a "sub-bucket" Sure enough, it was a 25 litre former Ice Cream pail with a 12" (to the best of my memory) subwoofer mounted in it. It sounded pretty good, too

    In any case, if you're pretty good with wood, I'd go for building a custom housing for the speakers. That's definately what I would do

  5. #5
    Join Date
    Jan 2004
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    196
    Quote Originally Posted by Egg Nog
    I remember that one of the BC MR2 club guys had what he called a "sub-bucket" Sure enough, it was a 25 litre former Ice Cream pail with a 12" (to the best of my memory) subwoofer mounted in it. It sounded pretty good, too

    In any case, if you're pretty good with wood, I'd go for building a custom housing for the speakers. That's definately what I would do
    I'm good with my hands... but all the things on the webpage Matra gave me are pretty complex... I may need an interpreter.
    Stickers add horsepower. I promise.

  6. #6
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    Apr 2003
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    More is not always better. You need to find out the specs of your speaker and use the program Matra is talking about. If you want loud bass which seems obvious, try facing the speaker into the trunk area. Make sure the sound can bleed back into the cabin ie leave out rear speakers from parcel shelf or make sure their are openings to let sound back in . Loading in this way can increase the volume by 3db which is around the minimum audible. It is also the sam increase you would get from going from a 10" to a 12" driver or approximately doubling the amplifier output. Much cheaper eh?If you run all of these speakers make sure the impedence matches your amps. ie 3x 4ohm speakers in parallel will be 1ohm and will probably blow the power supply. Three 4phm speakers in series will be 12 ohm which means they will require a lot of power to drive loud. There are goo site on the net about speaker design although I would question horn loaded cabinets for car installs because of their complexity and size. No offence MAtra.
    "A string is approximately nine long."
    Egg Nogg 02-04-2005, 05:07 AM

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