Forums
https://www.decware.com/cgi-bin/yabb22/YaBB.pl AUDIO FORUMS >> D.I.Y. >> Straight Horn https://www.decware.com/cgi-bin/yabb22/YaBB.pl?num=1599757697 Message started by dank on 09/10/20 at 18:08:17 |
Title: Re: Straight Horn Post by gsanger on 09/10/20 at 23:19:37 That’s so cool! Keep us updated, I want to know how it goes! I have ambitions of making some fiberglass horns later this year or early next (as money allows), but am always looking for ideas for a mid-bass and subwoofer horn solution. I’m not familiar with ProBox - does that model horns, too, or did you do any modeling with something like Hornresp? Always looking for more resources. |
Title: Re: Straight Horn Post by Donnie on 09/11/20 at 21:44:53 Holy Crap! That looks like something I would make to piss off the neighbors. I approve! |
Title: Re: Straight Horn Post by 4krow on 09/12/20 at 23:35:16 I admire your courage, but dam your judgement. I'm not saying that a folded horn would be easier to build, but it would inherently have much more stiffness so that the horn would shake itself to death. I too, have built acoustic boxes, experiments on a note, and found the truth to be harsh. |
Title: Re: Straight Horn Post by litefootdan on 09/15/20 at 04:34:40 Dan, you’re so cool!!!!! I admire you’re your endeavors. I wish I had half your willingness to start and finish a project. ;) |
Title: Re: Straight Horn Post by Brian on 09/16/20 at 05:22:43 Dan, I hope I do not speak out of turn if I say: To me your bracing does not look like bracing. I think it is ballast weighting down the panel. At least mostly. I think what is needed to brace the panels is internal cross struts. I hope that is helpful. Brian |
Title: Re: Straight Horn Post by Lin on 09/22/20 at 16:57:13 Looks to me like he is just trying to keep the panels from resonating. Would there be much pressure in a straight expanding horn? |
Title: Re: Straight Horn Post by Brian on 09/23/20 at 05:06:13 I think you are right Lin. But won't internal braces be needed to to get the panels stiff enough to stop that resonance? Brian |
Title: Re: Straight Horn Post by Lin on 09/25/20 at 04:21:00 I'm not a structural engineer, but with what I would assume are very low pressure changes side to side, the external bracing seems like it should do the job well enough. |
Title: Re: Straight Horn Post by dank on 09/25/20 at 17:31:05 I have built Voice of the Theater A7 cabinets using 1/8" masonite for the horn that was braced with 2x2's and never had any trouble with it. I also never felt any pressure in the horn. With this much longer straight horn the pressure inside the horn is VERY noticeable. Also, there is nothing to tie the horn bracing to...on the Voice of the Theater it was all secured to the cabinet itself, whereas on this straight horn its all "floating". The two obvious choices would be to run internal braces, or put the thing in a corner and brace it to the walls. Too much effort to overcome all the issues with something that turned out too big for actual use (unless I use it as an excuse to build a bigger workshop!). I've scrapped it. Dan |
Title: Re: Straight Horn Post by Lin on 09/26/20 at 04:13:42 Thanks for the update Dan (now I can stop being wrong in my assumptions). |
Title: Re: Straight Horn Post by 4krow on 09/27/20 at 16:25:23 More than few times, I have scraped a project due to issues of use or performance. The good thing to know is that you paid for a lesson and that makes up for most of the loss. Besides, not many people will take their thoughts to action, and for that, you should feel good about yourself. Never let your success or failure be due to a lack of effort. |
Title: Re: Straight Horn Post by Lonely Raven on 09/29/20 at 23:09:01 Bummer, I was really looking forward to seeing where this goes. |
Title: Re: Straight Horn Post by SteveB on 10/10/20 at 13:22:54 I would have suggested a layer of dynamat and another layer of masonite on the outside. Standard mod for small horns. I may be too late for this project, but it might help someone else. |
Forums » Powered by YaBB 2.2.2! YaBB © 2000-2008. All Rights Reserved. |