Boom Box

Boom Box


Project Category:
Portable Speakers

Project Level:

Project Time:
1-8 Hours

Project Cost:
Under $100

Project Description:
I wanted to build a modern version of my “boom box” that I had back in high school.

Design Goals:
I wanted a small portable bluetooth speaker with big sound.

Driver Selection:

Enclosure Design:
I had some left over curly maple and cherry from another furniture project. Enclosure is 20″ long x 5.5″ tall x 6″ deep. Has 2 1″ ports on back with box tuned to approx 100Hz.

Enclosure Assembly:
Built the enclosure out of maple and cherry and biscuit joined all parts.

Crossover Design:
1st order butterworth at 2500Hz with a large capacitor on the woofer for high pass.

This thing sounds amazing and really has some oompf!

About the Designer:
I have been building speaker projects for about 20 years off and on and am avid woodworker and knife maker.

Project Parts List:

Dayton Audio TCP115-8 4″ Treated Paper Cone Midbass Woofer 8 Ohm
Dayton Audio RS75-8 3″ Reference Full-Range Driver 8 Ohm
Lepai LP40PA 40W Mini Plate Amplifier Bluetooth Aux 3.5mm Input and Control Panel
Round Speaker Wire Terminal Cup Spring Type
300uF 100V Electrolytic Non-Polarized Crossover Capacitor
4-Pack Rubber Cabinet Feet 0.69″ Dia. x 0.39″ H
10uF 100V Electrolytic Non-Polarized Crossover Capacitor
Dayton Audio 0.50mH 20 AWG Air Core Inductor Crossover Coil
Speaker Cabinet Port Tube 1″ ID x 4″ L Flared
Sonic Barrier 1/2″ Acoustic Sound Damping Foam with PSA 18″ x 24″

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