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Event Horizon: a slim, wall-mounted WMTMW

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  • #76
    Re: Event Horizon: a slim, wall-mounted WMTMW

    Actually, I forgot to mention that the other frustrating thing I found out while doing this project is that 4" midwoofers make terrible woofers in 3-ways. Reason being, their Fs is so high that it creates a resonance with the Low-Pass filter, and you end up with these huge, ugly humps in the bass response. The bass sucks; it's all punchy and sounds like the speakers are made of cigar boxes. Once embroiled in that battle, I found it was safest to just seal the speakers and let the sub handle the bass. But that went against my original goal of having a 3-way full-range speaker I could mount on the wall. So back to the drawing board again with the design.

    Soooo... the Event Horizon in its current draft I have dubbed the Event Horizon XL, because it needed bigger woofers with lower Fs. Yes, it's a bigger cabinet. How big, I don't even remember right now. I'll have to go look at my sketches.
    Isn't it about time we started answering rhetorical questions?

    Paul Carmody's DIY Audio Projects
    Twitter: @undefinition1

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    • #77
      Re: Event Horizon: a slim, wall-mounted WMTMW

      I'd be interested to know if you tried an impedance flattening notch on the woofers (yes, I know, some big values) and didn't like it.

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      • #78
        Re: Event Horizon: a slim, wall-mounted WMTMW

        Originally posted by mobius View Post
        I'd be interested to know if you tried an impedance flattening notch on the woofers (yes, I know, some big values) and didn't like it.

        The components in the impedance comp circuit would cost more than the woofers!
        Isn't it about time we started answering rhetorical questions?

        Paul Carmody's DIY Audio Projects
        Twitter: @undefinition1

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        • #79
          Re: Event Horizon: a slim, wall-mounted WMTMW

          The reason I asked is that I'm playing around with some ND91-8's and although the values are probably smaller than what you need, I'm getting away with 5mH and 200uF in sims, that'll cost $16.00 using Erse and npe's. Seems worth it considering I'm thinking of using 4 of the little woofers per side. I was just wondering if there were any negatives to the response.

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          • #80
            Re: Event Horizon: a slim, wall-mounted WMTMW

            It is interesting to note that when I modeled on-wall speakers in Jeff's Baffle Diffraction and Boundary Simulator, 5 to 6 inches of depth ends up being the sweet spot for most common baffle widths. Also, design looks solid, prototypes look great. Good job! Oh, and I only noticed the depth on the simulator since I'm designing an on-wall center channel to go under my projector screen, though I'm looking for something smaller
            Audio: Media PC -> Sabre ESS 9023 DAC -> Behringer EP2500 -> (insert speakers of the moment)
            Sites: Jupiter Audioworks - Flicker Stream - Proud Member of Midwest Audio Club

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            • #81
              Re: Event Horizon: a slim, wall-mounted WMTMW

              Originally posted by Paul Carmody View Post
              Soooo... the Event Horizon in its current draft I have dubbed the Event Horizon XL, because it needed bigger woofers with lower Fs. Yes, it's a bigger cabinet. How big, I don't even remember right now. I'll have to go look at my sketches.
              +1 Subscribe me to updates about the Event Horizon XL! As I mentioned in my thread, I am looking for a high-value wall-mount, that is capable of being run without subs in a small room.

              Other than time (can't help you with that), what can we do to help you realize this design?

              -- Cameron

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              • #82
                Re: Event Horizon: a slim, wall-mounted WMTMW

                Originally posted by Paul Carmody View Post
                Actually, I forgot to mention that the other frustrating thing I found out while doing this project is that 4" midwoofers make terrible woofers in 3-ways. Reason being, their Fs is so high that it creates a resonance with the Low-Pass filter, and you end up with these huge, ugly humps in the bass response. The bass sucks; it's all punchy and sounds like the speakers are made of cigar boxes. Once embroiled in that battle, I found it was safest to just seal the speakers and let the sub handle the bass. But that went against my original goal of having a 3-way full-range speaker I could mount on the wall. So back to the drawing board again with the design.

                Soooo... the Event Horizon in its current draft I have dubbed the Event Horizon XL, because it needed bigger woofers with lower Fs. Yes, it's a bigger cabinet. How big, I don't even remember right now. I'll have to go look at my sketches.

                Paul I'm here to bug you too. did you get a chance to look up the box size on the horizon xl? will there be two sizes available sealed/ported?

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                • #83
                  Re: Event Horizon: a slim, wall-mounted WMTMW

                  I'm curious, it sounds like most of you are planning to use these for HT at least
                  part of the time, and some are saying they do not want subwoofers. Obviously,
                  the more challenging HT movies have the most demanding LFE of any source
                  material, so what is the plan to just keep these on small to avoid overloading them?

                  Anyone considered a thin sub under or behind a couch?

                  Aiming for 40 Hz is good for most music source but I just don't see how this is good
                  enough for demanding video applications.

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                  • #84
                    Re: Event Horizon: a slim, wall-mounted WMTMW

                    my brother is acutally wanting to do his surround system which he currently has a ported 10" sub. we are concerned with the fact that the current design is lacking bass. i don't think i've seen where it was discussed how much that might effect music or how well it blends into a subwoofer so there are some concerns at this point for us. he loves the look though and being low profile and able to hang on a wall is a big plus to him.

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                    • #85
                      Re: Event Horizon: a slim, wall-mounted WMTMW

                      Originally posted by tashspop View Post
                      my brother is acutally wanting to do his surround system which he currently has a ported 10" sub. we are concerned with the fact that the current design is lacking bass. i don't think i've seen where it was discussed how much that might effect music or how well it blends into a subwoofer so there are some concerns at this point for us. he loves the look though and being low profile and able to hang on a wall is a big plus to him.
                      Then why not just "hang" another speaker design? While being on the wall isn't ideal for some designs, adverse affects would be minimal for many solid, existing designs, or you could even venture into tweaking the crossover to compensate some.
                      My projects
                      https://picasaweb.google.com/112307725038877176664

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                      • #86
                        Re: Event Horizon: a slim, wall-mounted WMTMW

                        Agreed. We just started looking. It's becoming hard for me to suggest something to him because in the end is what he wants but with his experience he doesn't know what to look for. Originally I was thinking OS would work well but it's looking like he is drawn to busier designs
                        Last edited by tashspop; 12-09-2014, 02:17 PM.

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                        • #87
                          Re: Event Horizon: a slim, wall-mounted WMTMW

                          Wait, which version are we talking about?
                          Isn't it about time we started answering rhetorical questions?

                          Paul Carmody's DIY Audio Projects
                          Twitter: @undefinition1

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                          • #88
                            Re: Event Horizon: a slim, wall-mounted WMTMW

                            paul i think we are after some information of the XL version that you mentioned.

                            from what i got on other posts you said you weren't happy with using the 4" mids in a 3 way design as the bass suffered.

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                            • #89
                              Re: Event Horizon: a slim, wall-mounted WMTMW

                              Hi Paul, I came across this thread my research for a speaker for my setup and I found the thread on Event horizons. I prefer the ND drivers over the HiVi, I plan on having a so the low end isn't a big issue for me. I was hoping you could share the XO design for ND drivers and any final recommendations on cabinet dimensions. I plan to use this a CC and build the box into a mantel below my tv. I will share the build process here once I get my ducks in a row.

                              Thanks!

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                              • #90
                                Re: Event Horizon: a slim, wall-mounted WMTMW

                                Paul, I've been scouring this thread for days now and am going to attempt to build these but have a few quick questions before I get started. Since I'm using these in a theater, I can easily extend the height so am very interested in the XL design. Did you ever figure the dimensions of the larger design to extend the bass? Also, since I'm putting them next to a projector screen, my goal is to go as shallow as possible so (forgive the noob question) if I make them less deep is it just a matter of making them longer/wider to compensate for the lost volume or will the performance suffer by doing so?

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