Speaker Related Projects

   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

NHT1259 Subwoofer

This subwoofer is fundamentally very simple. It consists of a 2.7+ cu. ft. sealed box housing a 12 inch woofer. The driver used is the NHT1259, currently available from Madisound

I decided to build two subs. Due to the size of the enclosure, SAF became a potential problem :) and of course two subs means twice as much SAF ! Coming to my rescue was a furniture showroom catalog I came across while on business in the Seattle suburbs. My wife liked the antique pedestals in the catalog pictures and agreed that subs of similar looks and function would be a great addition to the room.

Here are pictures of the two resulting subs using the NHT1259 driver. Different cameras were used thus the colors vary.

This is the first sub serving as a pedestal for a phone and answering machine.

This is the second sub.

This is another view of the second sub in the far corner of the room now flanked by 2 couches.

This picture of the first sub has the most accurate colors (assuming "normal" monitor brightness, contrast, gamma and TrueColor graphics).

The resulting sound is most impressive. The subs have incredible punch, and have usable output in the mid 20's. The sound is not boomy and does not have the "windy" sound often found on commercial bandpass units with undersized woofers.

Cost was kept to a minimum by using scrap and recycled materials from a local surplus store. Each unit, including the driver, cost about $175. The superb quality of the driver, the simplicity of the box, and the relatively inexpensive materials makes a 1259 based sub the best sub value around. It is an ideal DIYers project.


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