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Maple and Walnut Heaven

Discussion in 'd.i.y.' started by cutting42, Jun 28, 2020.

  1. Rockmeister

    Rockmeister pfm Member

    And, he’s modest!
     
    cooky1257 and Cereal Killer like this.
  2. cutting42

    cutting42 Arrived at B4 Hacker Erg \o/

    Not much visual progress made, just continued the glue up of the various strips of walnut and maple. Will take some pics next update
     
    Cereal Killer likes this.
  3. BruceFlea

    BruceFlea pfm Member

    Your workshop looks a top quality space!
     
  4. Beginning to look like speakers :)
    [​IMG]
     
  5. 337alant

    337alant Negatively Biased

  6. a.palfreyman

    a.palfreyman pfm Member

    CK,
    You sure those baffles will be rigid enough? ;)
    Top work by the way. :cool:
     
    Tarzan likes this.
  7. Thanks guys! Yes they will be very solid, I'm sure. :)

    FYI that's not my workshop, but if it were I'd not need a house !!
     
    orangeart likes this.
  8. cutting42

    cutting42 Arrived at B4 Hacker Erg \o/

    I have been remiss on the wip pictures. I will try and upload some to show the steps so far. I have been sending some to CK so as not to torture him too much ;-)
     
    Cereal Killer likes this.
  9. Paul Burke

    Paul Burke pfm Member

    Looking nice. Assume the woofers will be flush mounted? And any plans for a roundover?
     
  10. Yes all fully rebated and radiused.
    [​IMG]
     
    Paul Burke and Hoopsontoast like this.
  11. Hoopsontoast

    Hoopsontoast pfm Member

    I hope there will be a round over on the back side of the woofer cutout?
     
    Fatmarley likes this.
  12. Paul Burke

    Paul Burke pfm Member

    For the back of the woofer, worth doing but not as vital. Very easy if done before attaching baffle- assuming that’s possible, most cabinets don’t have a separate baffle like these do

    Far more important though is the biggest radius possible on the 2 long verticals sides, helps edge diffraction significantly and improves the horizontal off axis performance, where it matters most. Side wall first reflection points often being the most important.

    Top & bottom can be done too but of less importance. I use 3” diameter roundover cutter, does mean the cabinet needs to be a bit wider than the woofer though. Most manufacturers skip this part since it adds a fair bit of cost and complexity to the build, but is well worth doing
     
  13. The cut-out is 195mm the internal dim is 202mm so not much left TBH!!
     
  14. a.palfreyman

    a.palfreyman pfm Member

    Top and bottom to the rear of the bass driver between the fixings?
     
    Cereal Killer likes this.
  15. cutting42

    cutting42 Arrived at B4 Hacker Erg \o/

    A few pics in rough order to this Monday

    Cabinet glue up, always terrifying but satisfying

    [​IMG]

    [​IMG]

    [​IMG]

    My idea to accommodate any wood movement, to make it a mechanical fixing. Will probably be glued in the centre and use silicone to make sure the seal is goo but it will clamp nice and tight.

    [​IMG]

    With these stainless steel angles. I hate drilling stainless but cobalt drills did a great job. Lots of practice with a hacksaw as well.


    [​IMG]


    Screwed into the sides

    [​IMG]

    [​IMG]

    [​IMG]

    Screw inserts let into the front and back pieces

    [​IMG]

    loosely bolted to check for expansion movement

    [​IMG]

    [​IMG]

    Current status with through holes cut to size and the side bevels sawn. The round overs on the front panel will probably be done by hand with the rest done by a router as they are 90deg and the front panel angles are not.

    [​IMG]

    Inset cuts for the drivers will be done once the rest of the cab is assembled finished and sanded
     
  16. a.palfreyman

    a.palfreyman pfm Member

    Yummy....
    What about a back-plate on the tweeter recess to stop internal pressure on the tweeter housing as the baffles are so thick?
     
  17. cutting42

    cutting42 Arrived at B4 Hacker Erg \o/

    That's one for the designer, all is possible currently
     
    Cereal Killer likes this.
  18. cutting42 likes this.
  19. a.palfreyman

    a.palfreyman pfm Member

    No, I didn't think it would be anything else TBH. It was just to keep the pressure changes from modulating the WHOLE tweeter chassis.
     
  20. orangeart

    orangeart KJF Audio Ltd.

    Coming along nicely those are.
     
    cutting42 likes this.

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