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Build Thread: SR71-inspired Center Channel

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  • ckmoore
    replied
    Re: Build Thread: SR71-inspired Center Channel

    The BBCC

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  • lunchmoney
    replied
    Re: Build Thread: SR71-inspired Center Channel

    We have a name:

    The Blackbird Center Channel

    (obviously inspired by the SR71 Blackbird jet)

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  • lunchmoney
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Originally posted by pres589 View Post
    This seems like an excellent project that a lot of people will probably take notice of. This would be enough to make me want to start pulling together parts and pieces to build four SR-71's and then your center (SR-71-C?) for the basis for an all around excellent home theater setup that can treat music well. Kudos.
    Since Zaph hasn't heard it, I'll refrain from calling it an SR71...

    But anyways, yes, four SR71's + this center (which really needs a name I guess) would make a stunning home theater, particularly with a sub (I'm using a sealed dayton ref 10).

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  • pres589
    replied
    Re: Build Thread: SR71-inspired Center Channel

    This seems like an excellent project that a lot of people will probably take notice of. This would be enough to make me want to start pulling together parts and pieces to build four SR-71's and then your center (SR-71-C?) for the basis for an all around excellent home theater setup that can treat music well. Kudos.

    Leave a comment:


  • lunchmoney
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Originally posted by djg View Post
    That is a very nice looking setup.
    Thanks. Ideally the mains would be a bit further apart, on stands, but for now it's a good baby-proof compromise.

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  • djg
    replied
    Re: Build Thread: SR71-inspired Center Channel

    That is a very nice looking setup.

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  • lunchmoney
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Annnnnnd.....done.

    Well, almost... still voicing, trying different values for the woofer inductor and tweeter resistor, but it's awfully close even with the first attempt (values very close to those of the mains).

    I'm very happy with it. Quite a bit cleaner and more detailed than the Tritrix center, with much more robust mid bass. Off axis performance seems excellent. Absolutely cannot tell that the driver layout is asymmetrical.

    It matches my SR71 mains beautifully, so mission accomplished

    I'll post the final crossover design with final component values after I dial it in and solder it up.

    Some day I'll spread out the mains a bit more, once my kid is a bit older.

    Big thanks to Zaph and MikeZ for all their help, and thanks to all those who took a look and chipped in their comments.





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  • lunchmoney
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Soldering the driver contacts, and installing the drivers




    Drivers installed. It's more or less done, now it's time for test lead mania... next is to hook it up, I'm gonna be trying different values for the woofer inductor and tweeter resistor for a while before finally buttoning it up...



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  • djg
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Nice, one pristine object surrounded by the mess required to make it. Looks very nice for vinyl.

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  • john trials
    replied
    Re: Build Thread: SR71-inspired Center Channel

    That grill looks nice. I now wish I had rounded the edges on mine!

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  • lunchmoney
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Magnets epoxied in, correctly this time :rolleyes:




    Adding gaskets to the drivers... thin weather stripping with an adhesive backing...




    Terminal cup screwed to the crossover door...




    PE Black Ash vinyl laminate... not my finest work, but it was quick, easy, and doesn't really matter much, since you'll never see any of it anyways (this will be buried in an AV cabinet, and have a grill over it)... prior to applying the vinyl, I hit the edges of the driver cutouts with a black sharpie, in case the drivers sink down a tiny bit below the edge... don't wanna see any mdf poking through...




    PE grill test fit (yup, it fits)... what a ridiculous coincidence how perfectly this fit...

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  • lunchmoney
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Just fixed it, I got the magnet out by chiseling out a small slot next to the magnet, then ptying it out with a screwdriver. Then I simply filled the slot back in with the same epoxy that glued the now-correctly-oriented magnet back in.

    Not a big deal... onward...

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  • lunchmoney
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Originally posted by fbov View Post
    Shattering them could be the start of a new baffle.
    Well, I wouldn't smack it THAT hard.

    I'll give it a shot... I think the magnets are quite brittle, it might work.

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  • fbov
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Shattering them could be the start of a new baffle.

    Any way you could glue a block behind, the run a screw in from the back to push even a corner of the magnet out, you're in much better shape. I bet these magnets will not shatter easily without liquid Nitrogen....

    Hve fun,
    Frank

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  • lunchmoney
    replied
    Re: Build Thread: SR71-inspired Center Channel

    Originally posted by davepellegrene View Post
    Love these moments. Plan everything out precisely then screw up something simple. I usually bang my head on the work bench a couple times and walk around calling myself a dumb ***.
    Might be able to run a screw in from the back side slowly and pop it out. Maybe score around the edges so it doesn't blow out the MDF.
    Dave
    I'm hoping I can simply shatter the magnet with a flat head screwdriver and a mallet... then I should be able to dig out the chunks.

    I have extra magnets, shouldn't be a big deal.

    These moments happen... as long as they don't happen in the form of an injury, it's all good.

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