|Project by Mark Burton||posted 05-28-2014 04:23 AM||1076 views||3 times favorited||3 comments|
This was my second go at building a small battery powered speaker enclosure. I used a 2.8 W amp board and LiPo charger/battery circuit from Adafruit. The two speakers on the front are Dayton 1-7/8” full range drivers that I got from Parts Express for about $5 each. The big baffle on the side is a passive radiator, which is identical to a driver except it has no motor (magnet on the back). The passive radiator concept is new to me and this was the first time I’d ever seen one, but it’s pretty incredible how much the sound improved from having the enclosure sealed with no passive. All in all, I think I’m into this project around $50. I’m going to build another one nearly identical to this one, except use thicker MDF and bracing, add a little more volume to the enclosure, and add a high pass filter to the speakers.