Portable bluetooth stereo speaker

Portable bluetooth stereo speaker


Project Category:
Portable Speakers

Project Level:

Project Time:
1-8 Hours

Project Cost:
Under $100

Project Description:
This is a build project I conceived for a friend’s 8-yr-old grandson (who is quite handy with various power tools and a soldering iron!).

Design Goals:
Self-contained portable enclosure comprising a stereo speaker arrangement plus amplifier/bluetooth receiver.

Driver Selection:
Qty 4: Parts Express sourced 1-1/2″ x 7″ 16-ohm full-range drivers (specified as surplus flat screen television speakers).

Enclosure Design:
Plastic ammo case (11” x 5” x 7.25”)

Enclosure Assembly:
Rectangular cutouts for the four drivers; two per box side for the L&R stereo configuration. Velcro adheres the amplifier to the case exterior.

Crossover Design:
None; drivers driven full-range. Each of the two driver pairs are wired in parallel, yielding an 8-ohm load per left & right channel.

Tips & Tricks:
All driver wire connections are soldered for ultimate portable reliability.

Fun & easy to assemble; sound is quite full with respectable bass response. The amplifier offers both bluetooth and a 3.5mm jack for stereo audio input.

About the Designer:
Retired engineer who enjoys fun with audio 🙂

Project Parts List:

YDT0420-4BP 1-1/2″ x 7″ Paper Cone Full-Range Speaker 16 Ohm
TPA3116D2 2x50W Class D Stereo Amplifier Board with Volume Control

1 comment

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  1. 1
    Sean Titmas

    Nice little ammo can Boombox project. Made all the more sweeter by having the young man help you. I can tell just from the way he’s holding that drill that he’s been taught how to properly use a cordless drill. Nice job young man.

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