Seat foam & Lukebox

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  • quickervicar
    E30 Enthusiast
    • Jun 2009
    • 1197

    #1

    Seat foam & Lukebox

    How much foam have you cut out of your standard seatback to get the Lukebox happy? I've removed about 2-3". Don't know how much more I can go without causing it to deform on the front side. Is there any advantage to removing more than the outline of the ski-pass?
  • aznbo187
    Wrencher
    • Mar 2008
    • 223

    #2
    I believe reading that cutting too much foam out of a non ski-pass seat allows the vinyl/leather to vibrate at higher volumes.

    Comment

    • Eric Giles
      E30 Enthusiast
      • Oct 2003
      • 1068

      #3
      Originally posted by aznbo187
      I believe reading that cutting too much foam out of a non ski-pass seat allows the vinyl/leather to vibrate at higher volumes.
      Fact is, you don't have to cut any of the foam and the material will still vibrate at higher volume, making your sub sound like it has a burnt voice coil. Hence, that's why I bought a rear seat with a fold down armrest-overall it's the preferred solution.
      Eric Giles
      '20 M2 CS
      '04 M3
      '11 X5 35D
      '87 325is
      '91 325i Sport

      There are few things more expensive than a cheap BMW...

      Comment

      • StereoInstaller1
        GAS
        • Jul 2004
        • 22679

        #4
        Try this: space the bottom of your seat out 2" or so.

        If it works, redrill to make fit

        Closing SOON!
        "LAST CHANCE FOR G.A.S." DEAL IS ON NOW

        Luke AT germanaudiospecialties DOT com or text 425-761-6450, or for quickest answers, call me at the shop 360-669-0398

        Thanks for 10 years of fun!

        Comment

        • StereoInstaller1
          GAS
          • Jul 2004
          • 22679

          #5
          Try this: space the bottom of your seat out 2" or so.

          If it works, redrill to make fit

          Closing SOON!
          "LAST CHANCE FOR G.A.S." DEAL IS ON NOW

          Luke AT germanaudiospecialties DOT com or text 425-761-6450, or for quickest answers, call me at the shop 360-669-0398

          Thanks for 10 years of fun!

          Comment

          • harv
            E30 Addict
            • Nov 2004
            • 555

            #6
            Luke,I like that idea. I have been dreaming of one of your boxes and been wondering what to do with my cloth rear seat.

            Hm

            John
            The Revolution will not be televised.

            Comment

            • quickervicar
              E30 Enthusiast
              • Jun 2009
              • 1197

              #7
              Originally posted by Eric Giles
              Hence, that's why I bought a rear seat with a fold down armrest-overall it's the preferred solution.
              Been trying to buy one for some time

              Comment

              • StereoInstaller1
                GAS
                • Jul 2004
                • 22679

                #8
                John, I'm telling ya man, my wifes cloth seat really does not affect the sound much at all, like 10%, max.

                Closing SOON!
                "LAST CHANCE FOR G.A.S." DEAL IS ON NOW

                Luke AT germanaudiospecialties DOT com or text 425-761-6450, or for quickest answers, call me at the shop 360-669-0398

                Thanks for 10 years of fun!

                Comment

                • quickervicar
                  E30 Enthusiast
                  • Jun 2009
                  • 1197

                  #9
                  I glued the foam chunk back in (just a couple dabs). We'll see which way sounds better.

                  Comment

                  • harv
                    E30 Addict
                    • Nov 2004
                    • 555

                    #10
                    Gotta get a box and try it out. I hope one of yours will fit as I put my PPI x overs under the rear deck. Awfully close to 15 inches.

                    John
                    The Revolution will not be televised.

                    Comment

                    • StereoInstaller1
                      GAS
                      • Jul 2004
                      • 22679

                      #11
                      john, the speaker "bulges" are the mark.

                      You MUST remove the tar on the floor...with the trunk carpet in, you should have exactly 15" from the bottom of the rear deck to the carpet...maybe 1/16th to spare.

                      My shit fits TIGHT, yo!

                      Closing SOON!
                      "LAST CHANCE FOR G.A.S." DEAL IS ON NOW

                      Luke AT germanaudiospecialties DOT com or text 425-761-6450, or for quickest answers, call me at the shop 360-669-0398

                      Thanks for 10 years of fun!

                      Comment

                      • quickervicar
                        E30 Enthusiast
                        • Jun 2009
                        • 1197

                        #12
                        Originally posted by StereoInstaller1
                        You MUST remove the tar on the floor...with the trunk carpet in, you should have exactly 15" from the bottom of the rear deck to the carpet...maybe 1/16th to spare.

                        My shit fits TIGHT, yo!
                        Too true! I will say that it only took about 1/2 hour with a heat gun and a pry-bar to remove the tar. Start with the heat gun on top of the tar @ one of the puzzle pieces at the edge of the spare tire well. Once you get the adhesive tacky pry it up a little & fire the heat gun under the lip & continue working your way around. All my tar weighed in @ 32#.

                        Once the tar is out it slides right in. Then it is time to take the spare tire out & redo the back 2/3 of the floor & tire-well with a few coats of ED's deadening paint. (Magnaflows are loud--even with a resonator)

                        Comment

                        • harv
                          E30 Addict
                          • Nov 2004
                          • 555

                          #13
                          No tar in my 318 is.

                          John
                          The Revolution will not be televised.

                          Comment

                          • StereoInstaller1
                            GAS
                            • Jul 2004
                            • 22679

                            #14
                            cheater

                            Closing SOON!
                            "LAST CHANCE FOR G.A.S." DEAL IS ON NOW

                            Luke AT germanaudiospecialties DOT com or text 425-761-6450, or for quickest answers, call me at the shop 360-669-0398

                            Thanks for 10 years of fun!

                            Comment

                            • Schnitzer318is
                              R3VLimited
                              • Jan 2008
                              • 2057

                              #15
                              Foam ftl with Luke's box. Just mho though. But I made the mistake of listening to it without the seat back in. :facepalm:

                              Ended up putting 2 ports (similar to the ones in the box itself) going through the vinyl. Not the best looking solution, but doesn't detract from the interior too much. Fold down seat would be ftw though.
                              "A good memory for quotes combined with a poor memory for attribution can lead to a false sense of originality."
                              -----------------------------------------
                              91 318is Turbo Sold
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                              05 4.4i X5 Sold
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                              90 325i Sold
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                              Comment

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