Paul Carmody's DIY Audio Projects

The Respository->DIY


DIY gives music lovers and audiophiles the ultimate power.  First of all, DIY speakers use the same parts, building materials (usually), and design techniques of HiFi speakers in the 4 and 5-figure range.  This means you can have that "rich" sound at a fraction of the retail cost.  Second, by learning the science behind the design of loudspeakers, a lot of the mysticism and mythology that plagues the audiophile world becomes dispelled, and you learn what is important--and what is irrelevant--in exceptional sound reproduction.

Everything here is free. I am a lifelong speaker addict, and this is my contribution to the audio world.

DIY Speaker Designs


Tang Band W4-1720 +
Fountek NeoCD1.0  Outstanding bass from such a small woofer, pleasant midrange, and a ribbon tweeter.  All in a small footprint.  Makes a great rich boy toy
Scan-Speak 15W/8530K00 + Hiquphon OWI  An unassuming-looking bookshelf 2-way that puts out phenomenal bass, and a pinpoint soundstage.  Exciting, yet comfortable at the same time.  Not for the frugal.
Overnight Sensations
Overnight Sensation
HiVi B4N + Dayton ND20FA-6
  A simple, small speaker with surprisingly deep bass and a wide and deep soundstage.  These are a good bargain for such a small price.
Overnight Sensation MTM
Overnight Sensation MTM
HiVi B4N
(x2) + Dayton ND20FA-6  Like the Overnight Sensations, but louder!  Big sound, small package.  These could be very versatile, and have been used in a wide variety of cabinets.
Dayton DA175 + Vifa BC25TG15  A low-cost, high-value speaker that was intended as a DIY nearfield studio monitor.
Classix II
Classix II
Dayton DC160 + Vifa BC25TG15 One of the funnest speakers I've ever done!  Great bass, solid soundstage, and a pleasing sound that works well even with poor recordings.  Great for getting a big sound in a small living space.


Overnight Sensation TMM Tower

HiVi B4N + HiVI T20 (or Dayton ND20FA-6)  The tallest member of the Overnight Sensation family.  This design fits in well with the look and sound of the rest of the series, but features much deeper bass than you'd expect from a pair of 4" woofers. 
 Dayton RS180-8 + Vifa DX25TG  This is a design intended for those who want a boutique, audiophile-quality speaker but don't want to pay the 4-figure price tag.  For $200, they should not disappoint.
 Peerless 830668 + Peerless 830657 + Vifa DX25  Wish there was some way to take the soul of the large Cerwin Vega and Klipsch "monkey coffins" of your sordid past and inject it into something a bit more modern and high quality?  Then this project is for you!
 Speedster TMM
 Tang Band W4-1720 + Fountek NeoCD1.0
The executive mini-speaker gets a slim floorstanding sibling.  

Classix 2.5
Dayton DC160 + Vifa BC25TG15
Expands on what's great about the Classix II (deep bass, big soundstage) by offering more SPL and a small TMM floorstanding cabinet.

Portable / Wireless

Dayton ND90 or Aura NS3
Cute, portable, and ready to play.  Just plug in your ipod or smartphone and rock out.  
Fountek FE85 + Tang-Band W5-1138SMF
Sick of the Sonos people having all the fun?  Now you can build your own "wireless
speaker" at a fraction of the cost.

Home Theater

Swope HT
Swope HT
 HiVi M6A, M5A + Dayton ND28F  MTM mains, TM surrounds, and a W/TM/W center channel.  Sexy looks and great sound!

Dipole/Open Baffle

Sunflower [Redux]
 Dayton RS225 + Dayton RS125-4 + Vifa XT25
  Very high-quality all-around speaker with a large soundstage and precise imaging, but with the "uncolored" midrange a dipole can provide.  Can be built in a variety of cabinet designs and should come in around $450.



Dayton RS125-4 + Tang Band 25-1719
  Not your average "slap a speaker into a weird plastic thing and find out what happens."  The Tubifex are a high-fidelity pair of speakers with great imaging and a surprising amount of bass extension.

Designs with Drivers No Longer Available

I am leaving these up for reference purposes.  If you still have these drivers, by all means, build and enjoy these speakers.  However, please don't ask me for driver substitutions at this time.  Sorry.

Core 2-way -  Dayton RS180-8 + Dayton RS28 (A or F) (floorstanding 2-way)

Untitled - Scan-Speak 8530K-00 + Hiquphon OW3 (bookshelf)

Girl from Ipanema  Dayton RS150 + Seas 27 TBFC/G (bookshelf)

Orient Express  Silver Flute W14RC25 + Vifa Logic AC25SG05 (bookshelf)

China Syndrome Silver Flute W14RC25-S + Vifa Logic AC25SG05 (bookshelf)

TRS-80  Dayton RS180S-8 + Vifa D25AG (floorstanding 2-way)

Vaagens  Audax AP170G2 + Vifa D25ASG (bookshelf)

Aethers Dayton SD215 + TB W5-704D + Seas 27TDFC (dipole MTMW)

Classix Dayton DC160 + Vifa DX19 (bookshelf)

ZX Spectrum HiVi M6A + Bohlender Graebener Neo3 PDRW  (floorstander)

Dayton Classic Revival Dayton DC160 + Dayton DC50F + Dayton ND20FA-6 (floorstander)


Other People's Projects - Here are a few writeups I did as I built some projects designed by some of the DIY masters out there.  I share them here because simply building a speaker is not necessarily an easy task.

Common Speaker Conversions - This is a simple excel calculator to perform a bunch of conversions I tended to need again and again while working on projects, but I got tired of using the calculator function on my phone.

I'll level with you - My audio manifesto.  This is what happens when a composer and musician also is a closet audiophile.  (Warning: contains unorthodox audio opinions)

That time I did a Reddit AMA

Twitter @Undefinition1

Questions or comments? (DIY related)