Its a bass reflex MTM bookshelf speaker. It utilizes two four inch woofers and a small dome tweeter.
I designed these speakers in my high school Advanced Audio Systems course, with the help of my teacher Mr. Grant Gustavsen. as a replacement to the sold out C-Notes. They needed to be around $100 and have a similar size and performance.
Dayton Audio TCP115-4 4″ Treated Paper Cone Midbass Woofer 4 Ohm – 295-415
Dayton Audio ND20FB-4 Rear-Mount 3/4″ Soft Dome Neodymium Tweeter – 275-035
It is a bass reflex box with .2ft^3 volume and is tuned to 76 Hz.
Particle board construction capped in poplar for aesthetic value. I sectioned off the bottom to make them taller and keep the internal volume constant.
The crossover is a two-way third-order Butterworth with a Zobel on the woofer.
Tips & Tricks:
A couple of kids in my class built the C-Note kits, and I feel like these met or even exceeded their performance. I think that these are great speakers to build on a budget.
About the Designer:
I’m a high school student who took tech class for the fun of it and my teacher Grant Gustavsen introduced me to the wide world of speaker designing. Through this I found a passion for sound quality and music appreciation.
Project Parts List: