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)

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

   Shiva_PR15
(A powered subwoofer using a 12" driver and 15" passive radiator. Jan-2010)

   Can-Less
(A computer speaker; redux. December-2005)

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

   Sonosub
(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)

   CeeDeePee
(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)

Articles

  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
(Outdated)

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

3-way Vented Floorstanding Speaker - Parts

Here are some minimal driver specs taken from the manufacturer's data sheets. Check with driver manufacturer or dealer for full spec.

Audio Concept Inc. AC-10

Ten inch poly cone with rubber surround.

  • Impedance = 8 ohms
  • Fs = 24 Hz;
  • RMS Power = 150 W
  • System Power = 200 W
  • Sensitivity = 89 dB
  • Voice Coil = 50 mm
  • Magnet mass = 1134 g
  • Sd = 0.0345 m2
  • Dcr = 6.45 ohms
  • Inductance = 1.7 mH
  • Xmax = 7.68 mm
  • Qms = 3.978
  • Qes = 0.420
  • Qts = 0.38
  • Vas = 111 liters
  • Range = 24-2000 Hz
  • Focal 5N313 Midrange

    A 5 inch midrange. Cone is described as "Neoflex cone with Plastiflex coating, semi exponential profile with phase plug". "Neoprene suspension with narrow half roll positive surround"

  • Nominal/Program (W) = 40/85
  • Nom/Min impedance (ohm) = 8/6.3
  • DC Resistance (ohm) = 5.3
  • Inductance (mH) = 0.45
  • Former = Nomex(R)
  • Layers = 2
  • Wire = copper
  • Cone = Neoflex
  • Surround = rubber
  • Magnet diameter (mm) = 100
  • Weight (g) = 552
  • Sensitivity 2.8V/1m (dB) = 90
  • Net Weight (kg) = 1.7
  • Xmax (mm) = 2
  • Fs = 51.91 Hz
  • Vas = 0.0144 m3
  • Qts = 0.249
  • Qes = 0.28
  • Qms = 2.234
  • Rcc = 5.3 ohms
  • D = 0.105 m
  • Sd = 0.0087 m/SUP>
  • N = 7 %
  • No = 90.42 dB/1W/1m
  • ScanSpeak D2905/9000

    28 mm textile dome tweeter with large, well damped surround and low resonance. Aluminium voice coil and ferro fluid filled gap.

  • Sensitivity = 90 dB 1W/1m
  • Free air resonance = 800 Hz
  • moving mass including air = 0.40 g
  • DC resistane of V.C. = 4.9 ohms
  • V.C. Inductance = 0.09 mH
  • V.C. diameter = 28 mm
  • Linear Max excursion = +-0.5/+-1.5 mm
  • Net weight = 0.70 kg
  • ScanSpeak D2905/9300

    New version with lower resonance.

  • Sensitivity = 90 dB 1W/1m
  • Free air resonance = 600 Hz
  • moving mass including air = 0.40 g
  • DC resistane of V.C. = 4.9 ohms
  • V.C. Inductance = 0.09 mH
  • V.C. diameter = 28 mm
  • Linear Max excursion = +-0.5/+-1.5 mm
  • Net weight = 0.70 kg
  • Howlett's Bargain Bay

  • Formerly in Shrewbury, MA. Consult directory assistance for their current address (and possible name change !) in Worcester, MA.
  • 29-September-2000


    Note: The contents in these pages are provided without any guarantee, written or implied. Readers are free to use them at their own risk, for personal use only. No commercial use is allowed without prior written consent from the author.