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1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

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  • little
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    Ha, my thoughts exactly. My room is only 12ft-8" wide and pretty much won't really see the sides as you only come from the back of the room.

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  • duanebro
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    I had issues with the front baffle being recessed. I have done every box after that with the baffle full width. This also helps by getting the joints on the side, less in your face if they show through the paint.

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  • Chris Roemer
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    Kitty litter (bagged) has been used. If you go w/steel, you have to keep it away from coils in the crossover.

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  • little
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    I was going to put the sand in sealed bags. Might even look into using steel plates as I get for free. Another option is maybe some lead shot

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  • jhollander
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    Lower is better for the ballast. Sand is a mess. It will leak through the smallest crack and get all over everything. For ballast consider making MDF blocks or anything other than sand. I tried using sand on some speaker stands,

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  • djg
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    I built a 5.1 Tritrix system. It sounded quite nice.

    I tried the oversize panel method once with mdf, going about 1/8" over. The amount of dust, nasty choking messy, sticky dust, was just amazing. Beware.

    I made TL mains and put the crossover in the bottom of the enclosure, visible through the back. Convenient.

    I made a few speakers before buying a plunge router and jig. Reconsider your plans, it is so much easier with the right tools.

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  • little
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    I'm building the standard 36" TL enclosure, but making the side panels 48" tall with 2 separate compartments below the main enclosure for the the ballast and the crossover. I was going to put the crossover in the chamber right below the main enclosure and the ballast chamber for a little extra stability at the very bottom. I have read some articles about some using the sand to aid in better bass, that is not what i'm trying to do, but if that does help, should the sand be right below the main enclosure or does that not matter?

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  • jhollander
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    I'd invest the extra time in 45 degree corners when using MDF. It keeps the joints from telegraphing through the finish or veneer. 45s take a bit a practice as you need to make a pretty shallow final cuts to keep the blade from pulling or lifting the material. I would guess the guys with 220 volt cabinet saw probably don't have that problem.

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  • little
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    Ok upcut spiral bit it is. I might have to look into rabbeting the edges for assembly. I've been seeing some builds with that and looks like it could aid in the assembly process as well as really making a super strong joint with all the added area for the glue to bond to. I think I have a 1/4" shank x 3/8" router bit.

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  • fbov
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    You want an up-cut bit when doing the driver relief, as it's a closed-bottom hole. the down-cut has advantages if you do oversize boxes. I have all straight bits, without a plunge router or commercial circle jig, and have made dozens of speakers. Special tools are nice but not mandatory.

    Once I discovered rabbeting router bits, I stopped building with b*u*t*t joints and started doing rabbeted b*u*t*t joints. In 3/4", I do a 1/2 x 3/4 rabbet. (A Dado is a groove that fits a panel. A rabbet is a one-sided dado.)

    You can't over-seal MDF. Conversely, no amount of sealing will keep joint lines from showing eventually. That's another reason to love rabbets; the seal is 1/4" from the edge, and easily hidden by a rounding-over the edge.

    Hurricane / T nuts can be more bother than they're worth. I love PE's #6 and #8 black screws.

    HAve fun,
    Frank

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  • jhollander
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    It depend on what you are cutting. Splintery veneered plywood I might use a down cut bit. I've had no problems with MDF. As you need to cut a test hole or two you will know right away.

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  • little
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    Does the upcut bit leave a nice edge? I was considering the down spiral because all I have been reading is that the down spiral leave a very sharp clean edge. And yes the full width of the box is 7.5" but all the builds cut the front baffle to 6" .

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  • jhollander
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    I prefer a spiral up bit to clear the cut as you go. Tilting the router in helps to keep the outside of the cut cleaner. If you are making a bunch of these consider making a template for your router and use a bushing. I made one and cut the woofers and tweeter recesses at the same time.

    Think through the oversize panels, anything bounded by two other panels should be your best cuts. Try cutting the panel dimensions that are the same all at the same time without moving your fence. I use a 16th or 1 mm if I’m over sizing.

    Skip the screws and use clamps and weights. The holes and filler seem to telegraph through the finish. I don’t seal the insides and don’t use hurricane nuts anymore. After you glue up give the MDF a week or so to dry out before final sanding.

    Curt’s web site show 7.5 inch width http://www.speakerdesignworks.com/Tritrix_pg_3.html I've added plywood backers behind MDF rabates

    Furniture lacquer is half the price of automotive paint.

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  • little
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    I'm also thinking about changing the front baffle to make it the full 7.5" as the recess for the woofer doesn't leave much material and looks like it could be a little fragile.

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  • little
    replied
    Re: 1st time home theater speaker build: Tritrix TL Tallboys, Tips and tricks?

    I have just started drawing up my cut sheet for the panels and using Sketchup I've come to realize that these design drawings don't work with the information given. I see a bunch of the drawings show a 78* angle for the inside back panel and 6" and 6" on each side of it at the bottom. If I hold the 4" outlet opening, the actual angle of the back panel is 77.4* and at the bottom I have offset distances from front and back, not 6 and 6". I think i'm going to just hold the 4" outlet opening and let everything else just fall into place. BTW, i'm building these like the 36" models and just adding the extra foot at the bottom seperate for the crossover and the ballast.

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