Tercet Towers
Designer:
Jim O
Project Category:
Tower Speakers
Project Level:
Intermediate
Project Time:
20+ Hours
Project Cost:
$500 – $1,000
Project Description:
Audiophile floor towers.
Design Goals:
To design and build a 3 way tower system using a 1st order crossover design with high power capabilities. To be driven with a stereo pre-amp and a 125 watt per channel amp. No EQ running totally flat.
Driver Selection:
(2)ea.
275-131 Dayton Audio RST28A-4 1-1/8″ Reference Series Aluminum Dome Tweeter 4 Ohm
295-528 Dayton Audio DSA175-8 6-1/2″ Designer Series Aluminum Cone Woofer
295-357 Dayton Audio RS270-8 10″ Reference Woofer
Enclosure Design:
3 separate cabinets stacked to make a tower using bass reflex designs that are angled to help improve time alignment and audio focus.
Enclosure Assembly:
Poplar fronts, tops and bottoms. MDF sides and backs, webs and gussets. I made 3D models for several of the parts and a friend printed them for me on his 3D printer.
Crossover Design:
1st order crossover with zobel network on the mid bass. As well as a frequency overlap between the bass and mid bass drivers. This was done using XSIM.
Tips & Tricks:
The fronts, tops and bottoms are stained with Barn Red polyurethane stain with a polyurethane clear coat. The sides and back have flat black exterior latex using a roller to apply.
Conclusion:
This requires 3D printed parts to complete as shown. I have the STL files I created for printing the plastic parts, but they exceed the 1.5 meg file limit here.
About the Designer:
I am a retired aircraft composite tool builder and now an amateur speaker designer/builder for my home stereos. I’m still learning (hopefully).
Project Parts List:
|
Part # |
Description |
Qty |
|
275-131 |
Dayton Audio RST28A-4 1-1/8″ Reference Series Aluminum Dome Tweeter 4 Ohm |
1 |
|
295-528 |
Dayton Audio DSA175-8 6-1/2″ Designer Series Aluminum Cone Woofer |
1 |
|
295-357 |
Dayton Audio RS270-8 10″ Reference Woofer |
1 |
|
266-836 |
ERSE 2.5mH 18 AWG Perfect Layer Inductor Crossover Coil |
1 |
|
255-402 |
Jantzen Audio 0.25mH 15 AWG Air Core Inductor Crossover Coil |
1 |
|
027-426 |
Dayton Audio DMPC-8.2 8.2uF 250V Polypropylene Capacitor |
1 |
|
027-124 |
Audyn Cap Q4 82uF 400V MKP Metalized Polypropylene Foil Crossover Capacitor |
1 |
|
255-957 |
Jantzen Audio 33.00 Ohm 10 Watt Audio-Grade Superes Resistor |
1 |
|
005-7 |
Mills 7 Ohm 12W Non-Inductive Resistor |
1 |
|
027-578 |
Solen 16uF 400V Polypropylene Capacitor |
1 |
|
260-303 |
Parts Express Recessed Binding Post Banana Jack 5-Way Speaker Wire Terminal |
1 |
|
N/A |
4″ ABS tubing for bottom firing ports on the lower cabinets |
1 |
|
N/A |
Polyfill |
1 |
Wow… I think you have succeeded in your chosen “hobby” these are awesome! These look as good as any I have seen in a upper level showroom. Great job!
Wow! Any chance there is a build thread somewhere?
I’m sorry there is no thread. I probably should have done a better job of documenting my work. I have a couple more projects in the works and hopefully will get them accomplished this year. I’ll try and get a better step by step process show. Thanks Jim O.
Sorry for the delayed response. There is no thread. All the info I could submit I did. The STL files for use in 3D printing of the printed parts are too large per PE’s limit to upload.
Marc, the info on this page is all I’ve provided. The STL files to use for slicing and 3D printing are to large to be submitted seeing there is a file size limitation on PE’s site. I’m not sure if there is a way through PE to make email contact so that I could provide you with more info etc.
Jim O
Jim. Your answers dont appear here for some reason but i’ll answer anyway. Truth is I would not need plans, your images are clear enough. I would have liked a build thread just because i love them. Speaker porn.
Too bad we can’t upload files, i would have liked to try them out. I need a project. Anyway excellent job.