Designer:
GaryG
Project Category:
Portable Speakers
Project Level:
Beginner
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.
Conclusion:
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:
|
Part # |
Description |
Qty |
|
289-2128 |
YDT0420-4BP 1-1/2″ x 7″ Paper Cone Full-Range Speaker 16 Ohm |
1 |
|
320-699 |
TPA3116D2 2x50W Class D Stereo Amplifier Board with Volume Control |
1 |