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Thread: Tuba HT Build

  1. #1

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    Default Tuba HT Build

    Y'all may have seen this folded horn sub before; it was the popular thing to build a year or two ago. I saw one on Craigslist, and it looked like too much fun, so I am building one myself and plan on documenting it here.

    I have sourced most of the parts and got started this evening. Moved the wood and equipment into the "workshop", made some sawdust, and diagrammed the panel projections onto one of the sidewalls.

    Tomorrow, I plan on cutting out the driver access and putting in the first of the panels.
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  2. #2

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    Wow you cut that in your kitchen? That is hardcore.

    That dust is -so- bad for you man... can't stress this enough!
    www.Vr3Mods.com ///// www.Version3Audio.com

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    I've been wanting to do this build (or the super spud)! cant wait to see your progress.
    design is where science and art break even.

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    Cool, Tuba HT as in a copy of Bill Fitzmaurice's folded horn design?

  5. #5

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    In the sense that you don't want to breath any fine particulate, yes. I wear a surgical mask style filter, like you would want to regardless of where you are cutting and leave a window open to prevent formaldehyde buildup. Other than that, there's not much in the MSDS. I am more concerned about igniting the dust, so I turn my gas off until I have things cleaned up.


    Quote Originally Posted by FTGV View Post
    Cool, Tuba HT as in a copy of Bill Fitzmaurice's folded horn design?
    Yes, one of his designs exactly, to be more correct.

  6. #6

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    Thumbs up

    Awesome! I would love to build one of these some day as well. Good luck with the build!
    I love animals, they're delicious!

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    Talking

    Quote Originally Posted by Vr3MxStyler2k3 View Post
    Wow you cut that in your kitchen? That is hardcore.

    That dust is -so- bad for you man... can't stress this enough!
    Only a buckeye would do that...

    Now a Hawkeye would know better!


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    Quote Originally Posted by newrival View Post
    I've been wanting to do this build (or the super spud)! cant wait to see your progress.
    There is a built Danley in Louisville for 800 thats fully working and just needs an amp lol

  9. #9

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    I had to go back in to work yesterday evening and didn't get as much done as I would have liked, but I got the access panel cut out and a couple of panels up today.
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    With a little effort, I got the driver hole cut and hurricane nuts in place. Then I put in the next two panels to complete the sealed box portion. I also cut the remainder of the panels.
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    Did more good work today. The panels need braces between them now, so going is a little slower, as there are two drying periods per. This polyurethane is great; my crappy Home Depot wood is rather warped in places and it gobbles up the little gaps no problem.

    It's starting to look like a horn now!
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  12. #12

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    I heard the low profile version of this beast last year and I'm now a believer in folded horn subs. The amount of output and sound quality is untouchable for the $$ investment. I wish I had the space for one of these!!

    Good luck with the build.

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    I too have read and learned a bit about the horn subs. Aren't they really good for HT more so than music due to their freq that they shine in?

    I liked the Danley DTS-10 but heard poor reviews of it for certain freq ranges.

    I'll be following this to see the outcome. I have a perfect area behind my couch where the wall dips back maybe 12-14" and is 5 ft wide which could house a nice unit in there. But the problem is will it give me that chest thump when a drummer is kicking his drum!?

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    I have a friend that had some Tuba's built and ran them in his horn based system for several years. Got to listen to them a number of times!

    At least in his case, they don't dig to the lowest of low freq's and I thought they might have had some need for a little eq to flatten them a little. But high gain, and super chest thumpin' hit a little higher in the normal bass kick range. So I'd go the other way...better for music than movie efx.

    I would suggest that the cross point and slope, and amplifier chosen to power them, would greatly impact the sound quality and satisfaction. So keep your options open and plan to experiment a little.

    He recently has gotten into open baffle bass and is at last report willing to sell his pair of Tuba's. Anyone within driving range of western NC/SC area that is interested should look that pair up!

    CJ

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    From what I have read, horn subs have two main tradeoffs: they are very large and they drop off like a rock at the bottom where the horn stops working. They are supposed to deliver very low distortion within their operating range, as well as high response levels with minimal power, as Iskandam said, so it seems like they would be a good fit for music.

    Anyway, I am building this mainly because I wanted to build something and it is relatively cheap. I expect it to outperform my current subs by a wide margin, but if it doesn't then its no big deal. I already have to EQ heavily to deal with room mode, so even if it was perfectly flat, I wouldn't know. I hope to get it functional by Labor Day, and then I can give some real impressions of my own.

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    The project looks great so far! What plans are you using for the build?
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    Quote Originally Posted by codyc1ark View Post
    Only a buckeye would do that...

    Now a Hawkeye would know better!

    Easy there. I cut outdoors only, with a nice big 3M respirator.

    I don't want any formaldehyde and such coarsing through my veins until I'm being pickled for burial


    Interesting fact: there are more carpenters with black lung disease than coal miners with black lung disease.
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    I was just giving you a hard time, because the the magnet on your fridge. ;)

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    This sub is incredibly musical and articulate. The response does fall off a cliff below 20 Hz. Corner loading it not only helps, but also recommended by Bill Fitzmaurice to increase its output by several dBs. That having been said, we demoed War of the Worlds and it had no problem lifting the couch off the floor while still sounding very clean.

  20. #20

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    Quote Originally Posted by Tbone289 View Post
    The project looks great so far! What plans are you using for the build?
    Thanks! Bill Fitzmaurice sells them on his site.
    http://www.billfitzmaurice.com/THT.html


    Quote Originally Posted by codyc1ark View Post
    I was just giving you a hard time, because the the magnet on your fridge. ;)
    No worries. I realize the situation is less than ideal, but the hazards associated with plywood are very manageable with proper precautions.

  21. #21

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    Quote Originally Posted by iskandam View Post
    This sub is incredibly musical and articulate. The response does fall off a cliff below 20 Hz. Corner loading it not only helps, but also recommended by Bill Fitzmaurice to increase its output by several dBs. That having been said, we demoed War of the Worlds and it had no problem lifting the couch off the floor while still sounding very clean.
    Sounds great. Thanks for the impressions; I look forward to hearing it for myself.

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    Quote Originally Posted by intangible View Post
    Thanks! Bill Fitzmaurice sells them on his site.
    http://www.billfitzmaurice.com/THT.html
    Thanks for the link. I'm looking forward to seeing the rest of your build!
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    Quote Originally Posted by inspiredsports View Post
    Interesting fact: there are more carpenters with black lung disease than coal miners with black lung disease.
    Quantitatively: yes, because there are more carpenters than there are coal miners; proportionately: no.
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    Put up two of the walls over the past two nights and got the last of the 45 degree cuts done. I kept getting my saw stuck half way or just winding up with really wavy cuts before figuring out that going freehand with the jigsaw worked much better. I'm now hoping to have it working before there is football to distract me this weekend.
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  25. #25

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    Broke in the driver while I was at work today, then put up the last panel tonight. I tried to take a motion-blurred picture of the driver in action, but apparently am not good enough with a camera to do so. The last panel is the most warped so far, making the joint between it and the previous ones quite ugly, but that side is going towards the floor, anyway. I think there is too much left to do to finish by Friday, but I am right on track for getting it working this weekend.
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    Put the last bit of bracing in today and moved it off the table for the first time in a while. It is BIG and heavy, even missing the other side and 15lb driver.
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    Driver and terminal cup are installed! Hopefully will get the other side and lips for the access panel put on tomorrow and be making noise by Sunday.
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  28. #28

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    Looks nice. Is that 1/2" plywood?
    --Gary--

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    It is, which is the recommended building material. I thought about going with 1/2" MDF instead, because it was the same price, flat, and wouldn't resonate like plywood does, but am glad I didn't, as I wouldn't be able to move the thing if I had.

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    Side panel on and curing. Had two of the sides left when the last tube of adhesive started getting harder to squeeze out but thankfully made it.
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