My Center Channel tweak still under construction...

har_navalta
har_navalta Posts: 957
edited April 2010 in Speakers
I am still working on my RTA Center channel cabinet enclosure to timber matches my SDA's TL version that uses SL3000 tweeters.

Here is a comparison when it comes to Acoustic Volumes.

RTA 15TL Enclusure size:
12"x15"x43" = 7740 acoustic volume

Compared to the one I am working with:
12"x34"x19" = 7752 acoustic volume
Post edited by har_navalta on
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Comments

  • HBombToo
    HBombToo Posts: 5,256
    edited April 2003
    You are very talented!

    with respect
    HBomb
    ***WAREMTAE***
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  • har_navalta
    har_navalta Posts: 957
    edited April 2003
    another view
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  • madmax
    madmax Posts: 12,434
    edited April 2003
    Question for you har, are the large side holes for PR's? Are you wiring the 6.5's s/p to get 6 ohms or are you going to stagger the crossover frequencies? Looks like a fine job on the cabinent!!!
    madmax
    Vinyl, the final frontier...

    Avantgarde horns, 300b tubes, thats the kinda crap I want... :D
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  • har_navalta
    har_navalta Posts: 957
    edited April 2003
    This is how it is joined together, using only carpenters glue no
    nails...
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  • har_navalta
    har_navalta Posts: 957
    edited April 2003
    I clamped it together about 8 hours for curing.
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  • har_navalta
    har_navalta Posts: 957
    edited April 2003
    Yes, the Large side holes are for the 2 passive radiators low
    and high.
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  • har_navalta
    har_navalta Posts: 957
    edited April 2003
    To be painted with Gloss Piano Black during summer and there are
    3 grilles that will cover the front and 2 side.

    I made it a table top for the Flasma 50" tv.
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  • madmax
    madmax Posts: 12,434
    edited April 2003
    Very nice indeed! Might I suggest a few braces between front and back, spaced in a non-consistant fashion. I like to do things like this project of yours but I never seem to have the time. Good luck!
    madmax
    Vinyl, the final frontier...

    Avantgarde horns, 300b tubes, thats the kinda crap I want... :D
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  • har_navalta
    har_navalta Posts: 957
    edited April 2003
    Originally posted by madmax:
    I suggest a few braces between front and back

    See proposed bracing.
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  • RuSsMaN
    RuSsMaN Posts: 17,986
    edited April 2003
    I'd do a little more than that, actually a LOT more, dado style, and put some screws to her, if you follow.

    Esp if you are going to set, a what $$$$ Tv on top?

    Cheers,
    Rooster
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • goingganzo
    goingganzo Posts: 2,793
    edited April 2003
    1 is a little on the skimpey. i would add a few more. on the top and botom.
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  • RuSsMaN
    RuSsMaN Posts: 17,986
    edited April 2003
    Actually, with FOUR 6.5's, and 2 pr's, I'd build something *around* the speaker, to seperate the tv from the speaker, maybe even have said *something* spiked.

    Cheers,
    Rooster
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • F1nut
    F1nut Posts: 50,813
    edited April 2003
    Damn nice job, Har. I'm impressed. I'll join the others with the extra bracing idea, maybe run a few top to bottom.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • Shizelbs
    Shizelbs Posts: 7,433
    edited April 2003
    Yeah, really nice job there. That looks great. A great idea too. I am predicting you will be very happy with your results.
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  • brettw22
    brettw22 Posts: 7,623
    edited April 2003
    Originally posted by har_navalta
    This is how it is joined together, using only carpenters glue no
    nails...

    Why not use nails? If for vibration purposes, I'd DEFINITELY put some screws into the thing to support the weight of a Plasma TV. Last thing you need is for teh Plasma to endo over your center and come a crashing to the floor. That, my friend, would be the true definition of a bad day......:)
    comment comment comment comment. bitchy.
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  • fireshoes
    fireshoes Posts: 3,167
    edited April 2003
    Vibrapods! Woooo!
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  • har_navalta
    har_navalta Posts: 957
    edited April 2003
    Thank you guys for your advice. I will leave only one bracing,
    this will be sufficient.

    I don't use nails or screws:) the Carpenters glue will hold it
    strong enough if they are clamped together until it dries. If you will see my Unit rack, maybe you will not believe that there is no screws or nails on it. Imagine the Unit rack holding the shelves of glass that are heavy let alone accompanied by the unit.
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  • F1nut
    F1nut Posts: 50,813
    edited April 2003
    Yeah, Har's right. The glue alone will do a much better job. When you start adding screws to wood or particle board it really eff's things up and nails are even worse. I spend alot of time reversing the damage done to a fine piece of furniture from some half-wit trying to "fix" it with screws and nails. Glue and clamp it!

    Har, I still suggest, strongly, that you add two braces running top to bottom.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • har_navalta
    har_navalta Posts: 957
    edited April 2003
    Originally posted by goingganzo:

    1 is a little on the skimpey. i would add a few more. on the top and botom.


    Originally posted by F1nut:

    Har, I still suggest, strongly, that you add two braces running top to bottom.


    I'd rather running horizontally than top to bottom. The width
    is only 12". The 3/4" board of a width of 12" will be okay.
    Besides there will be a solid 1-1/2" hardwood endcaps top
    and bottoms.

    The board glued perfectly 90 degrees at all 8 corners and it is
    very strong. The top end board carried by a DAP connections
    glued to the vertical walls same as the bottom end.
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  • F1nut
    F1nut Posts: 50,813
    edited April 2003
    Har,

    I was thinking about bracing for the weight of the TV, how much does it weigh? Also, the top to bottom bracing would help cut down on internal vibrations being transfered externally to the TV.
    Just a thought, cuz.

    Jesse
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • har_navalta
    har_navalta Posts: 957
    edited April 2003
    Jesse,

    How much does it weigh? for 50" Plasma about 95lbs to be exact.

    Ok, I got your point. Yeah I might add 2 pieces running top to bottom instead.

    Har
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  • F1nut
    F1nut Posts: 50,813
    edited April 2003
    Har,

    Only 95lbs. Cool, that's not much weight. I don't think the bracing would have to be much, just something to dampen the vibrations when you crank it up and I know you'll be cranking it up!!!Another idea would be to use anti-vibration material under the TV or maybe do both. I'm really impressed with how you're making this, 1st class, all the way.

    Jesse
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • har_navalta
    har_navalta Posts: 957
    edited May 2003
    My center channel is almost finished. I worked all day during the weekends. I did the grille frame and top and bottom end caps. All I have to do now is to paint the grille frame with black and glue
    the grille cloth. The top and bottom has to be stain. The cabinet enclosure also has to be painted with Piano gloss black and that's it.

    I am too tired during the weekends. I got these pictures today.

    Here are the pictures.

    First the Front Grille frame. No grille cloth yet with the Polk
    Audio LOGO.
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  • har_navalta
    har_navalta Posts: 957
    edited May 2003
    These are the grille fames on the side for the Passive Radiators
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  • har_navalta
    har_navalta Posts: 957
    edited May 2003
    This is the top (A solid ASH wood, similar to Oak but it is smoother
    than the Oak). The thickness is 1-1/2 inches rounded at edges.
    To be stain (don't no yet what color).
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  • har_navalta
    har_navalta Posts: 957
    edited May 2003
    and Lastly the Bottom. Also a solid ASH wood, same thickness as
    top end. Pre-rounded on the front as you can see in the pic.
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  • har_navalta
    har_navalta Posts: 957
    edited May 2003
    This is how it would look like when you put them together without
    the grille cloth.
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  • har_navalta
    har_navalta Posts: 957
    edited May 2003
    a Semi-Side View
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  • har_navalta
    har_navalta Posts: 957
    edited May 2003
    Parts on the RTA 15TL are almost ready to swap to the modified Center Channel.
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  • har_navalta
    har_navalta Posts: 957
    edited May 2003
    another view in the front...
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