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Intermediate Active 2.1 Bedroom Speaker System

Rating:
4.66667/5,
Tags:
  • Machine Type:
    OpenBuilds WorkBee
    Software:
    Fusion 360, Openbuilds CONTROL
    Electronics:
    OpenBuilds BlackBox
    Machine Time:
    Not calculated
    Bit or Laser Size:
    1/8"/ 3/16"/ 1/4" two flute upcut & 1/4" ball end
    Feeds & Speeds:
    17000RPM, 1725/1985/2330mm/min, 1-3mm DOC
    Materials:
    1/4"/ 1/2"/ 3/4" MDF
    This is a little 2.1 speaker system with all parts cut on a little Workbee 1050. Attached pictures show the components made on the CNC router.

    I gave some small, low-cost electronics a go (specifically the DSPB-100 / KAB-250V3 / DSPB-EC combo with DSPB-ICP1 programmer) for driving SB65WBAC25-4 / W5-1138SMF drivers. The electronics have DSP & Bluetooth capability.

    The speaker enclosures are made from various thicknesses of MDF. Tongue and groove jointing in the subwoofer enclosure panels worked out particularly well and will be used again. Making all parts on the CNC ensured precise fitting at assembly.

    The curved fronts turned out well using a 3D Parallel machining finish. The mating curved front for the small satellite speaker was made to allow the front to be oriented face down for flush trimming the perimeter of the front baffle.

    A big challenge was implementing DSP with SigmaStudio in order to achieve appropriate crossover slopes and flat overall frequency response.

    Spot putty and thinned wood glue was used on edges and such prior to painting to provide a smooth initial surface. I tried the white roller grade Duratex finish on the little speaker system.
    SB Acoustics SB65WBAC25-4 V2 Enclosure Prototype 20-06-30.jpg 107501445_3066745230085443_3172953074336391659_o.jpg 109125417_3094102727349693_1761811317437822704_o.jpg 109219915_3094104980682801_2815580986439412125_o.jpg 109038356_3094107164015916_1646211734592891001_o.jpg 109357383_3094109437349022_7050083829420428744_o.jpg IMG_2404.jpg 109286691_3094113684015264_2735220168957105170_o.jpg Side View of System Before Finishing 20-08-06.jpg IMG_2467.JPG IMG_2485.JPG DSC_0073.jpg DSC_0066.jpg SigmaStudio Bedroom Speakers Project Screenshot 20-08-01-00.jpg

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Ariel Yahni, Mark Carew and rokasni like this.

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  1. JimKramer
    I have thoughts of building some bookshelf speakers. Yours turned out real nice.
      rscamp likes this.
    1. rscamp
      A CNC is great for making speaker enclosure components! I'm currently making some enclosures for Paul Carmody's Amiga MT...
      rscamp, Nov 6, 2020
      JimKramer likes this.
  2. Mark Carew
    Work of art! Really nice job @rscamp
      rscamp likes this.
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