Speaker Related Projects

   3-Way High Efficiency Speaker
(Lavoce, Dynaudio, Foster 3-way. October-2023)

   LCR MTM 3-Channel Speaker
(Three MTM Speakers in One. July-2023)

   Mini7bt - A Minimus 7 Portable Bluetooth Speaker
(Minimus 7 and Dayton Audio. Spring-2022)

   2-Way Ribbon Tweeter Speakers
(Vifa and Pioneer. May-2020)

   Transmission Line Speakers
(Aborted attempt at a TL. September-2012)

   Acoustic Research AR-4x Rehab
(Rehab of a garage sale find. January-2016)

   Infinity RS-4000 Rehab
(Rehab of a garage sale find. June-2015)

(A tall, thin, upwards firing omnidirectional speaker. May-2010)

(A powered subwoofer using a 12" driver and 15" passive radiator. Jan-2010)

(A computer speaker; redux. December-2005)

(A computer speaker in a light canister. Jan-2005)

(10" vented subwoofer in a cardboard tube, powered by a Parapix amp. May-1999)

   MTM Center Channel Speaker
(A Madisound design. Nov-1997)

   2-way Surround Speakers
(5" woofer and 1" tweeter. July 1997)

   3-piece mini system
(6" DVC bass module mated to 4" car speaker. June 1997)

   3-way Vented Floorstanding Speaker
(vented 10" woofer, 5" mid and 1" tweeter in a 4 ft tower. Summer 1995)

   NHT1259 Subwoofer
(A 12" woofer in a sealed architectural pedestal. Winter 1994-95)

   Inexpensive Speaker Stands
(Particle board, sand and spray paint. Fall 1994)

   2-way satellite
(6.5" woofer and 1" tweeter. Summer/Fall 1994)

Audio Electronics Related Projects

  900 MHz Audio Receiver
(Better use for bad headphones. Jan-2008)

  Buster - A Simple Guitar Amp
(Perfect for the beginner. Jan-2010)

  A PC-based Audio Console
(Use a PC to play tunes. Jan-2010)

  LM-12 Amp
(Bridged LM-12 opamps. Aug-2003)

(A CD player and FM tuner from spare computer parts. Oct-2002)

   Quad 2000 4-Channel Amp
(Premade modules by Marantz. May-1998)

   Zen Amp and Bride of Zen Preamp
(by Nelson Pass. Apr-1997)


  Using Wood in Speakers FAQ
(Work in progress)

   MDF FAQ for speaker builders

   Woodworking Tools for the DYIer
(HomeTheaterHiFi.com Oct-1998)

  Some Thoughts on Cabinet Finished for DIY Speakers

   Large Grills Made Easy

   Some Parts Suppliers

Other Useful Stuff

   DIY Audio Related URLs

  Veneering Primer
(by Keith Lahteine)

   How to get a Black Piano Finish
(by DYI Loudspeaker List members)

   Sonotube FAQ
(by Gordon McGill)

   Excerpts from the Bass List
(Oldies but Goodies)

DIY Loudspeaker List

  DIY Loudspeaker List Archives


The Can-Can, Redux

Since leaving my last job, the Can-Can speakers have been sitting around collecting dust. I decided to re-use the Aura drivers as a computer speaker to replace a set of Altec Lansing multimedia speakers. I built new speaker boxes and mated them with a more powerful amplifier.

The new amp is based on a pair of National Semiconductor LM3876 amp-on-a-chip and powered by a 25.2VCT transformer. The entire contraption is mounted inside an old Exabyte SCSI tape drive enclosure. External connections consists of a 1/8 inch stereo phono input jack and 5-way binding posts for left/right speaker outputs. A single volume pot decorates the front panel.

The new speaker box is made from some material I had in the garage. I made the top, bottom, front and back from 5/8 inch void-free birch plywood while the sides are solid walnut. Using solid wood (lumber) is not a very good idea since it can move (expand and contract) with environmental changes. In this case, the room I'm using it in is fairly consistent in humidity year-round. Hopefully, this feature, and the relative small size of the box will keep the box from splitting. Time will tell. I don't have a lot of time invested in this project so if it were to fail, I can always rebuilt it.

The Aura driver is mounted towards the top part of the enclosure to better align with my ear height when I'm sitting in front of the computer monitor. The port is vented at the bottom of the box. Box volume is 0.10 ft^3 and the 1 inch ID vent is about 5-3/4 inches long. The pictures here were taken before I applied a water-based polyurethane to all surfaces.


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