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  • 18" HO - Pair

    Dimensions: 47.5" x 14" x 22" After bracing, etc. I should have ~4.7ft3.
    The 20Hz highpass is built into my amp, that's why it's in the models.








    Sealed Model with 4 drivers (not finely tuned)






    Model with 18" PR:
    http://i.imgur.com/sKhEueQ.png - http://i.imgur.com/QsNSC4e.png - http://i.imgur.com/raZ5i09.png - http://i.imgur.com/LFT7z5q.png

    First model with 15" PR:
    http://i.imgur.com/DzGrQdc.png | http://imgur.com/elShu8I | http://i.imgur.com/pOIfoCO.png

    Second, with slightly different EQ and more PR weight, also 15":
    http://i.imgur.com/c5OIZNL.png | http://i.imgur.com/smBP4vu.png | http://i.imgur.com/oLLULpJ.png
    Last edited by icor1031; 07-12-2014, 04:18 AM.
    An apostrophe with an "s" does not mean plural.

    Speaker's IS NOT PLURAL.

  • #2
    Re: New Pair of 18" HO (RSS460HO-4)

    Update:

    I think I'm going to go sealed instead. With 4 drivers like I plan to have, I get 98dB @ 8Hz with 1kw.
    And I can put the $150/pr towards those extra subs. I'm very excited about these drivers, .
    An apostrophe with an "s" does not mean plural.

    Speaker's IS NOT PLURAL.

    Comment


    • #3
      Re: New Pair of 18" HO (RSS460HO-4)

      I'd go with a cab that has more width and height so you can have some be at floor level and some above, which will help manage the floor-ceiling modes. You could do a fibonacci sequence with the smallest dimension depth, then width, then height, fairly easily. Find your desired cab volume, take the cube root of that, you'll have the internal width. 1.62 times that width would be height, and .62 of it would be depth.

      IOW, you have 8120 cu inches approx. 8120^(1/3)~20.1. 20.1 wide, 12.4 deep, 32.6 tall. This is without bracing. Start with 25% more for bracing and driver displacement, and you get 21.6,13.3,35 internally- close to your dimensions (outside is 23.1, 14.8, 36.5) but with a little shift away from the longest dimension and into the shorter ones. This will not only push the pipe modes higher in frequency a bit, but be a little more aesthetically pleasing. The extra breathing room to the sides and rear of the driver are also nice, and it's more material efficient. you can even use 24 or 23.875 as the width to maximize cut sheet efficiency.

      Comment


      • #4
        Re: New Pair of 18" HO (RSS460HO-4)

        Originally posted by badman View Post
        I'd go with a cab that has more width and height
        No room, it has to fit under my acoustic panels and between the wall and my furniture. :( If I absolutely have to, I can stand it up and then make it deeper - but I lose a pair of panels so I won't do that unless it's a considerable problem.
        An apostrophe with an "s" does not mean plural.

        Speaker's IS NOT PLURAL.

        Comment


        • #5
          Re: New Pair of 18" HO (RSS460HO-4)

          naw, you'll be fine unless you try to run them relatively high in freq, which I don't expect you will- sounds like a cool project, I am just always looking to squeeze in that last 10%.

          Comment


          • #6
            Re: New Pair of 18" HO (RSS460HO-4)

            Originally posted by badman View Post
            naw, you'll be fine unless you try to run them relatively high in freq, which I don't expect you will- sounds like a cool project, I am just always looking to squeeze in that last 10%.
            Right on :D
            They will cross @ 60-70.
            An apostrophe with an "s" does not mean plural.

            Speaker's IS NOT PLURAL.

            Comment


            • #7
              Re: New Pair of 18" HO (RSS460HO-4)

              Subscribed.
              Kenny

              http://www.diy-ny.com/
              DIY NY/NJ 2014 https://www.youtube.com/watch?v=FGwA...ature=youtu.be
              Man does not live by measurements alone, a little music helps.

              Comment


              • #8
                Re: New Pair of 18" HO (RSS460HO-4)

                I noticed you had 40dB and 12dB of gain at 8Hz and was wondering what you're using to EQ / power them? I'm starting to layout a subwoofer with the goal of a response down into the mid-high teens myself.

                Comment


                • #9
                  Re: New Pair of 18" HO (RSS460HO-4)

                  Originally posted by Kristian_AUS View Post
                  I noticed you had 40dB and 12dB of gain at 8Hz and was wondering what you're using to EQ / power them? I'm starting to layout a subwoofer with the goal of a response down into the mid-high teens myself.
                  I plan to use mini-dsp. I think it goes to 48dB, but hopefully I'll have it next month and know for sure.
                  An apostrophe with an "s" does not mean plural.

                  Speaker's IS NOT PLURAL.

                  Comment


                  • #10
                    Re: New Pair of 18" HO (RSS460HO-4)

                    I dont think this is a good idea at all. I applied all of your filters and it shows over 10k VA with only 1 watt input. Every 3 db of boost doubles the power requirement...
                    http://jaysspeakerpage.weebly.com/

                    Comment


                    • #11
                      Re: New Pair of 18" HO (RSS460HO-4)

                      Originally posted by Jay1 View Post
                      I dont think this is a good idea at all. I applied all of your filters and it shows over 10k VA with only 1 watt input. Every 3 db of boost doubles the power requirement...
                      Your dB should be ~106, then - my plans only give 98dB.


                      EDIT: I'm sorry, I only spoke of 2 subs in my OP but I modeled for 4. I meant to state that, I've edited the OP now.
                      Last edited by icor1031; 07-12-2014, 04:23 AM.
                      An apostrophe with an "s" does not mean plural.

                      Speaker's IS NOT PLURAL.

                      Comment


                      • #12
                        Re: New Pair of 18" HO (RSS460HO-4)

                        Here are my 18s!

                        I'll be very happy to get rid of my 12's very pathetic box.

                        An apostrophe with an "s" does not mean plural.

                        Speaker's IS NOT PLURAL.

                        Comment


                        • #13
                          Re: New Pair of 18" HO (RSS460HO-4)

                          These ever get built. Curious as I have one 18HO and am toying with the eye to have a stereo pair. Run those from 20 to 200.

                          Comment


                          • #14
                            Re: New Pair of 18" HO (RSS460HO-4)

                            Did this today






                            An apostrophe with an "s" does not mean plural.

                            Speaker's IS NOT PLURAL.

                            Comment


                            • #15
                              Re: New Pair of 18" HO (RSS460HO-4)





                              An apostrophe with an "s" does not mean plural.

                              Speaker's IS NOT PLURAL.

                              Comment

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