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  • building a speakerbox, question?

    hey all.. got a question..

    I'd like to make a basic rectangular box to hold 2 10" subs. I've done this out of 3/4" MDF board before and the sound was amazing (calculated the volume and everything)... My question is can I do this using lexan (plexiglass) and get the same or similar sound results? I want it to look cool yet sound good too.

    anyone done this?

  • #2
    I think you'dhave to have an MDF frame becuse the plexi would flex(i). But an MDF frame,painted black, with plexi/lexan windows might work. maybe a rough idea
    http://www.cardomain.com/item/OBCGZ101 to get you started.
    My Carputer! (More Car Pics at the end)
    2 Kicker Comp 10"
    Epia M-9000, 256 MB DDR, 120 Gig HD
    Lilliput 7" VGA Touchscreen
    Check it out?!

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    • #3
      How did you calculate the volume?
      Renault Megane...the OEM look

      The Lost in Europe Ford Escort

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      • #4
        well, a good way is packing peanuts
        My Carputer! (More Car Pics at the end)
        2 Kicker Comp 10"
        Epia M-9000, 256 MB DDR, 120 Gig HD
        Lilliput 7" VGA Touchscreen
        Check it out?!

        Comment


        • #5
          Yes, 3/4 plex or lex is way stronger then MDF. Do your self a big favor and drill pilot holes trough the plexi before you run screws threw it. i did a 10,000 dollar system in a honda once and i used 3/4 plex sheet to be the front wall/face of the box, so you could see the subs when you folded the seat down. i also had the subs inverted so you could see them from the trunk too. i was using 2 eclipse titanium 12's they were getting 800w to 1000w a peace. with no problems on the plex

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          • #6
            http://www.bcae1.com/spboxad2.htm this was a cool enclosurer tool.

            simple one http://www.carstereo.com/help2/Articles.cfm?id=5

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            • #7
              Originally posted by Cris
              How did you calculate the volume?
              when I did this it was...1996 so i forgot all that...I have to get out the ol math book and calculator

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              • #8
                Originally posted by 14.4vTech
                Yes, 3/4 plex or lex is way stronger then MDF. Do your self a big favor and drill pilot holes trough the plexi before you run screws threw it. i did a 10,000 dollar system in a honda once and i used 3/4 plex sheet to be the front wall/face of the box, so you could see the subs when you folded the seat down. i also had the subs inverted so you could see them from the trunk too. i was using 2 eclipse titanium 12's they were getting 800w to 1000w a peace. with no problems on the plex
                ok now I went to Home Depot and they didn't have ish... where would I find some of that 3/4" plex/lex? and is it pricy? I don't want to pay outrageous $$$ (im a cheapo)..

                one more question.. what is the best adhesive for glueing 2 pieces together? I want something that holds/seals.

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                • #9
                  GLUE!?!?! Never GLUE anything, What and why do you want to glue.
                  the peace i had was about 3'x2' it was about $60.
                  Look for a plastics or glass place in the phone book call around and some pne will point to the right phone number.

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                  • #10
                    Originally posted by 14.4vTech

                    Thanks a lot.
                    Renault Megane...the OEM look

                    The Lost in Europe Ford Escort

                    Comment


                    • #11
                      Originally posted by 14.4vTech
                      GLUE!?!?! Never GLUE anything, What and why do you want to glue.
                      the peace i had was about 3'x2' it was about $60.
                      Look for a plastics or glass place in the phone book call around and some pne will point to the right phone number.

                      when i say glue i actually mean fuse, seal, attach.. ya know? If I screwed them together that's fine but i still wanted to use something stronger than silicon seal to seal the seams.

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                      • #12
                        Originally posted by tsparks
                        when i say glue i actually mean fuse, seal, attach.. ya know? If I screwed them together that's fine but i still wanted to use something stronger than silicon seal to seal the seams.
                        Ohh, k no just use sillicon its better because it doesnt dry hard, use elmers in between the wood peaces when your scrweing it together. (suggest drilling and screwing the box together first just to make sure its all right, then take apart and glue. when your done if your still paranoid about air leaks you can use liquid nails inside the box on all the seams.

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                        • #13
                          Personally I'd screw it all together and seal all the seams with clear silicone caulk. When it's done fill it with water and see if it leaks. If it does drain it out let it dry and reseal where it leaked. Should work out fine. Liquid nails should also work pretty well if you want it glued as well as screwed. Certainly would be strong seams.

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                          • #14
                            good luck finding 3/4 inch plexi fora rerasonable price. the stuff is prohibitively expensive. My piece of plexi one inch thick, dimensions 7x48 cost nearly $100 retail. and that is just one piece!

                            realistically, lexan or plexi are indeed stronger, or at least have hte potential to be stronger than MDF. However, they flex much much more easily, and its very difficult to add bracing to teh box, at least mroe so than MDF, and still look good.

                            thus, its mch more often that you will find plexi enclosures that flex, contributing ot ****poor sounds. Ive never personally heard an all plexy box htat has sounded good yet. this could be for a myriad of reasons, but Its really just too cost prohibitive to work with.

                            my vote for assembly, should you choose it to work with, is to use the adhesive that breaks apart the chains and repolymerizes the acrylic at the joint. It becomes stronger than the bulk material, so it will be strong and doesnt even require sealing on the inside, where you could see whatever you used.

                            also no screws required!

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                            • #15
                              Originally posted by Cris
                              How did you calculate the volume?
                              This is cool freeware app.
                              WinISD/WinISD Pro from http://www.linearteam.dk/
                              Nobody liked my monkey :(

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