DIY Stereo Towers

DIY Stereo Towers


Designer:
Nick

Project Category:
Tower Speakers

Project Level:
Intermediate

Project Time:
8-20 Hours

Project Cost:
$100 – $500

Project Description:
This was my first speaker build. I wanted speakers specifically for stereo without the need for a separately placed subwoofer.
I left the crossover visible on the rear of the speaker. So much work goes into this I didn’t want to hide it. The frequency response from XSim turned our very flat. I am very happy with the results.

Design Goals:
The goal was for a relatively inexpensive build that achieves a high quality full range sound.

Driver Selection:
Dayton Audio PT2C-8 Planar Tweeter
Part # 275-085

HiVi M6N 6″ Aluminum/Magnesium Midbass
Part # 297-441

Dayton Audio DCS305-4 12″ Classic Subwoofer 4 Ohm
Part # 295-204

Enclosure Design:
MDF with internal bracing

Enclosure Assembly:
Separate upper and lower cabinets allow for easier placement of the speakers.

Crossover Design:
4th order Linkwitz-Riley at 2500 Hz
Woofer is crossed over at 100 Hz through a AV receiver

Tips & Tricks:
XSim
DIY Audio & Video website for calculators
AudioTool
Parts Express

Conclusion:
The speakers exceeded my expectations.

About the Designer:
I am an aircraft structural engineer who has always had a hobby in home and care audio that likes wood working. This combined the two perfectly.
I will probably never buy a premade set of speakers again.

Project Parts List:

Dayton Audio PT2C-8 Planar Tweeter
HiVi M6N 6″ Aluminum/Magnesium Midbass
Dayton Audio DCS305-4 12″ Classic Subwoofer 4 Ohm
Dayton Audio SPA500 500W Subwoofer Plate Amplifier
Dayton Audio SPA500 500W Subwoofer Plate Amplifier
Dayton Audio DMPC-20 20uF 250V Polypropylene Capacitor
Dayton Audio 1.5mH 20 AWG Air Core Inductor Crossover Coil
Dayton Audio 0.80mH 20 AWG Air Core Inductor Crossover Coil
Dayton Audio 0.35mH 20 AWG Air Core Inductor Crossover Coil
Dayton Audio 0.15mH 20 AWG Air Core Inductor Crossover Coil
Dayton Audio DMPC-8.2 8.2uF 250V Polypropylene Capacitor

6 Comments

Add yours
    • 2
      Nick

      I use a separate amplifier to run the 12″ woofers so I can control the gain and frequency which helps with the sealed enclosure. The main speakers are cut off at 100hzs so the woofers take it from there.

  1. 3
    Ruben C Acosta

    I like how you designed these and the frequency response looks great. I am trying to rejuvenate my speakers which I bought in the 70s. I did work on them in 1986 but that was 34 years ago. After I am done this time there be nothing original left. Excellent job you did here.

  2. 4
    Ruben C Acosta

    I don’t understand values for L and C and how you labeled their order. DIY calculator yields much different values for 8 ohm 4th order LR. The tweeters are about 5 db higher SPL so they must be very bright. I see no resistors or an L pad for it. They are great looking set of speakers, kudos for finishing. How did you get those corners, do you have a shaper?

    • 5
      Nick Davis

      The tweeter is 8 ohm but the 2 mid woofers are 8 ohm wired in parallel so they have an equivalent 4 ohm load. The frequency response chart in the pictures has the blue line as overall. Red is tweeter and green is a singe mid woofer. Since there are 2 mid woofers they equal the blue line.
      Sys=total, S1=tweeter, S2=mid woofer#1, S3=mid woofer#2
      S3 is not shown on the graph since it is identical to S2
      The 4 ohm load and 2 woofers eliminate the need for a L pad.

  3. 6
    John Franks

    This is an excellent concept. By keeping your +100 Hz elements in the enclosure with with the smaller baffle width, you’ve helped with establishing imaging that might be less precise with a wider baffle. Plus your midrange drivers don’t have to share air with the sub

Leave a Reply to RYAN Cancel reply