DIY SPEAKERS AND SUBWOOFER PROJECTS
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A collection of Do-It-Yourself (DIY) Speaker and Subwoofer Projects. If you have a DIY Loudspeaker or Subwoofer Project that you would like to share with others through this site, please contact me.
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Fostex FX120 ML-TQWT Speaker Project - 5 May 2008 
Martin from Germany has put together a great looking pair of tower loudspeakers using the Fostex FX120 fullrange driver. The enclosure is a Mass Loaded - Tapered Quarter Wavelength Tube (ML-TQWT). As you can see Martin has done a bang up job with the speaker enclosure. His design was created using the MathCAD worksheets from Martin J. King. His speaker project includes a baffle step correction circuit. Martin reports that the sound is relaxed with a detailed midrange and good highs. He also indicates that the ML-TQWT enclosure gets good low end extension from this little driver. Great work Martin! |
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DIY Fostex FE127E Bass Reflex Bookshelf Speakers - 29 February 2008 
These are a nice looking pair of DIY speakers that Peter in Australia has put together. It is a fullrange (single driver) design in a bookshelf sized enclosure with a net volume of 12.5L. The enclosure is a simple vented (bass reflex) cabinet and uses the inexpensive Fostex FE127E fullrange drivers. The DIY speaker cabinets are made of MDF and finished with a wood veneer. A Baffle Step Compensation Circuit is also included in the design. Peter reports that this relatively small speaker works well in small to medium sized rooms and has very special sonics which can bring out spectacular mids. |
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Fostex FX120 Bass Reflex Bookshelf Speakers - 25 February 2008 
My latest pair of DIY speakers is another fullrange design, but this time in a bookshelf sized enclosure. The enclosure is a simple bass reflex cabinet using Fostex FX120 fullrange drivers. The great looking curved enclosures are prefabricated and from Parts Express. The FX120 is a really smooth driver and I prefer it over the FE127E. This system delivers decent bass extension in a small sized room and it also blends in well with a subwoofer. The FX120 has great sonics and midrange. This relatively small speaker also works great as nearfeild monitor. |
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DIY Zigmahornets Speakers with Fostex FE103E Driver - 7 November 2007
Barry has completed another pair of single driver loudspeakers. This time it is a nice looking pair of Zigmahornets. While the Zigmahornets were originally designed for use with the now discontinued Fostex FE103, Barry is reporting good results using the newer Fostex FE103E Fullrange Driver. In his short article, Barry shows us just how simple it is to build yourself a great sounding set of speakers even if you don't have a table saw at your disposal. Barry reports that the sound is clear and clean with very good bass response from such a small driver. |
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DIY Hi-Vi 3-Way Tower Speaker Project - 10 September 2007 
Adam has completed a fantastic looking 3-Way Tower Speaker Project using Hi-Vi drivers. The Hi-Vi F8 Woofer is housed in a bass reflex enclosure which is separate from a sealed portion that contains a the pair of Hi-Vi F5 mid-woofers and a Hi-Vi SD1.1-A tweeter. The sound is divided using a 3-way 2nd order crossover network. The enclosure is constructed from MDF and is finished using black oil based epoxy paint and red oak trim. I really like how the black and red oak compliment the yellow Kevlar cones of the Hi-Vi drivers. Adam reports that the sound is clear and clean with great bass response. |
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Tobler-ONE: Jordan JX92S ML-TL DIY Speakers - 9 May 2007 
Francesco has put together an elegant Mass Loaded Transmission Line (MLTL) loudspeaker enclosure for the Jordan JX92S fullrange driver. The enclosure cross-section is trapezoidal and thus it lends itself well to corner placement. The narrow baffle and corner placement result in a high WAF, while not sacrificing the low frequency response. To match the room decor, the enclosure is constructed from beech plywood. The result is an aesthetically pleasing loudspeaker with great sonic qualities. |
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K-502 Tube Amplifier Kit and The DelSol Speaker - 5 April 2007
This is Barry's build of the K-502 Tube Amplifier Kit and The DelSol Speaker. The enclosure for the K-502 Tube Amp Kit is wood and plexiglass. Together these two projects make a great looking hi-fi unit. Nice work Barry! |
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Aura NS3-194-8E DIY Bookshelf Speaker Project - 5 January 2007
Jesse has put together a small and inexpensive fullrange bookshelf/monitor speaker that uses the Aura NS3-194-8E fullrange driver. The enclosure is a simple bass reflex cabinet with no crossover or correction circuit. The results are a fun and small DIY project that makes a great near field monitor which will work well with a small amplifier such as the inexpensive Sonic Impact T-Amp. |
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DIY Fostex FE127E Sealed Bipole Speaker Project - 13 November 2006 
This is Alex's build of my Sealed Bipole Project using the Fostex FE127E. Alex did a wonderful job constructing the enclosure using MDF and solid narra! I was very pleased when Alex sent me pictures of the finished project and his positive comments with how nice the speakers sound. |
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DIY 10" Ported Subwoofer Project - 1 November 2006 
I needed a matching subwoofer to fill in the bottom end of the Fostex FE127E Sealed Bipole project and the result is the MAW-10 Ported Subwoofer. The enclosure is constructed from 3/4" MDF and active power is supplied by a small partsexpress plate amplifier. On the underside of the enclosure is a speaker terminal so I can switch between passive and active power. The enclosure was finished with the same cream color paint used on the Fostex FE127E Sealed Bipole to make a matching set. This is an easy to build project that delivers nice tight bass without breaking the bank. |
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DIY Fostex FE127E Sealed Bipole Speaker Project - 19 June 2006
As a follow up to the BD-Pipes, I decided to try out another full-range speaker project. In an attempt to get better mid-range and more bass, I decided to try a sealed enclosure that would be coupled with a subwoofer. This project uses Fostex FE127E drivers and a simple sealed bipole enclosure constructed from MDF. The results are a great sounding speaker with higher attainable output levels and much improved mid-range in comparison to the BD-Pipes. Again, with a single driver covering most of the frequency range, you get pretty good imaging. The bipole configuration eliminates the need for a BSC and provides a wide soundstage with good depth. With the sealed enclosure, you get excellent cone control, great mid-range and you can develop moderate SPL. The bottom end is filled in with a subwoofer crossing over at about 80Hz. |
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DIY BD-Pipes with Radio Shack 40-1197 Speaker - 4 February 2006
This is a full-range DIY speaker project using Bert Doppenberg's ML-TQWP design for the ACR FE103, but with Radio Shack 40-1197 (FE103) drivers. Each enclosure uses two in phase (push-push) full-range drivers, one firing forward with the other driver firing upwards and backwards at about 45 degrees. This results in higher output levels than a single driver system and virtually eliminates the baffle diffraction step. As such, there is no baffle step compensation circuit or crossover. The bass response is surprisingly good considering the small driver size (only 4"). The midrange response is very good and the treble is quite extended. As with most full-range speaker designs, the (point source) imaging is excellent and there is that coherency which is often lost in multi-driver speaker systems. The total costs for this project ring in at about $140CDN. This has been my first experience with a full-range speaker and most definitely it will not be the last! |
DIY Loudspeaker Designs on Paper
The following DIY Speaker Enclosure Designs have yet to make it off the drawing board:
- Lyeco LY401F Double Bass Reflex Enclosure - 27 March 2007
- Lyeco LY802F Aperiodic Tower - 17 December 2006
- Lyeco LY802F Sealed Tower - 11 December 2006