Page 1 of 2 12 LastLast
Results 1 to 15 of 24

Thread: Something Old, Something New ...

  1. #1
    dougzilla
    Guest

    Something Old, Something New ...

    I finished my first Cab for the Sub 1500, thought i would share a few pix.

    Something Old: The granite top is 100 million years or so.

    Something New: The speaker; the amp.

    Something Borrowed: The expertise in this Forum and thanks a lot!

    Something (almost JBL) Blue: Well the baffle is as close as I could come off the shelf in a spray can....

    Details: This is a 3.1 cu ft internal volume box (not counting speaker displacement or bracing), with a baffle that is tilted back 10 degrees from vertical. Check a later post for my spiritual inspiration. Basic construction is 3/4 in. MDF, lock miter joints at all side corners, no mechanical fasteners except for hardware mounts. The box bottom is recessed up 1 inch from the lowest side point (to allow concealed casters) into a dado slot on all sides; the top is overlap rabbetted.

    The side cheeks are 9ply 1/2 in. baltic birch, which I veneered with American Black Walnut. All sides are braced with same 3/4 MDF, inlet into dados, and an extra brace from L to R side across the middle of the cabinet. Sound absorbancy via R13 fiberglass all surfaces. It's very rigid and non-resonant. Finish is spray paint over primer on baffle and back, then high gloss nitrocellulose lacquer over natural Watco Danish Oil on the walnut.

    The 2 cm granite top is large grain Baltic Brown, from a scrap I found for cheap at a local stone yard, which they cut and polished to my spec. The quartz inclusions give a bluish cast, very pretty in the right light. it complements the walnut well, I think.

    The amp is a 250W no-name plate amp from Parts Express.

    Overall dimensions, outside: 18.5 W, 23 H, 19 D (Top) 23 D (bottom).

    Sound: Very deep, solid and controlled response, no really audible peaks or dips. I run this with the amp to max bandwidth, but crossed off the mains with an active Xover (behringer 3210) at 60 Hz. It sounds fine up to ~100 Hz, though.

    It was a lot of fun to build, and i'll stay with the slant front for future subwoofer editions. This one goes in the family/media room. I still have to build a suite of three speakers and a media cabinet for the formal LR. Should keep me out of trouble for a while....

    Adios,
    Attached Images Attached Images  

  2. #2
    dougzilla
    Guest
    Empty box.
    Attached Images Attached Images  

  3. #3
    dougzilla
    Guest
    Rear View
    Attached Images Attached Images  

  4. #4
    dougzilla
    Guest
    With Grille mounted
    Attached Images Attached Images  

  5. #5
    dougzilla
    Guest
    stone/wood detail
    Attached Images Attached Images  

  6. #6
    dougzilla
    Guest
    Spiritual Inspiration: When the Air Force builds a subwoofer, it doesn't fool around! Tuned to about 0.1 Hz, I'm told....
    Attached Images Attached Images  

  7. #7
    jcdahl
    Guest
    Hey Doug;

    Very nice work !! The same internal volume as mine..
    How much fill did you use?
    How is the granite top attached?
    What material is the grill made of?

    The wood finish is beautifull

    The Air Force spent a lot more on theirs. Also I think the Fs is actually up in the GHZ range.

  8. #8
    Administrator Mr. Widget's Avatar
    Join Date
    Apr 2003
    Location
    San Francisco
    Posts
    9,715
    Very nicely done Doug!

    Widget

  9. #9
    jtgyn
    Guest
    G'Day Doug,
    Very very nice! But ...

    "Basic construction is 3/4 in. MDF, lock miter joints at all side corners, no mechanical fasteners except for hardware mounts. The box bottom is recessed up 1 inch from the lowest side point (to allow concealed casters) into a dado slot on all sides; the top is overlap rabbetted. "

    Please excuse my woodworking ignorance.. but how is the box held together again ?

    Regards Scott

  10. #10
    Administrator Robh3606's Avatar
    Join Date
    Apr 2003
    Location
    Rocinante
    Posts
    8,163
    Now that is a nice looking sub!!!

    Rob

  11. #11
    Super Moderator Hofmannhp's Avatar
    Join Date
    Dec 2003
    Location
    Central Germany
    Posts
    1,266

    granite

    Originally posted by dougzilla
    stone/wood detail
    Hi all,

    I'm sure Bo can tell us where this stone is coming from and date it exactly (and what the plate is for)

    Nice Work Doug...I like it

    HP
    Please help us save more info about the vintage systems. Let us register your speakers and drivers.

  12. #12
    RIP 2009
    Join Date
    Feb 2004
    Location
    Rohnert Park, CA
    Posts
    3,785
    Really nice work! 'Sure has been a lot of inspiration here lately on sub cabs. I've still got to get to mine...

    John

  13. #13
    Figge
    Guest
    just beutiful zilla!! hope u aint gonna use them as targetpractice!

  14. #14
    Senior Seņor boputnam's Avatar
    Join Date
    Apr 2003
    Location
    northern california
    Posts
    6,142

    Re: granite

    Originally posted by Hofmannhp
    I'm sure Bo can tell us where this stone is coming from and date it exactly


    Well, I do get to use one of my favorite decriptors: poikilitic granite. The xenomorphic feldspars (orthoclase...?) give a nice luster to the specimen. An abundance of free quartz, too. Interesting.

    I'm not confident of it's provenance, as there is so much shipping of slab these days. And, neither the texture nor composition is common to the Sierra batholith (although it could be a localized intrusion into said batholith), but I suspect it's age may be materially younger than 100Ma, perhaps something of the 34Ma or 65Ma cluster (if from North America...).

    But I'm, more romanced by the Blue... :o

    Nice work.
    Last edited by boputnam; 06-22-2004 at 07:01 AM.
    bo

    "Indeed, not!!"

  15. #15
    Senior Seņor boputnam's Avatar
    Join Date
    Apr 2003
    Location
    northern california
    Posts
    6,142

    Re: Something Old, Something New ...

    Originally posted by dougzilla
    Something (almost JBL) Blue: Well the baffle is as close as I could come off the shelf in a spray can....
    Hey, Doug...

    I'm getting some tins made-up this week (I'm horribly remis in dosing the JBL Blue junkies... ). If you want a tin, pm me your mailing address, or maybe we could arrange a "paint drop"...
    bo

    "Indeed, not!!"

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •