Competition Free Style DJ blue tooth boom box
I had a lot of left over parts from my first project boombox – the Sonic Boom, so this boom box was designed to use a lot of those unused parts
Rockville 12″ Flat Subwoofer, earth quake 12 inch Passive, 2x pyle pro bullet tweeters, 2x 5 inch midranges, 2x ported KLH mid-woofers
This time I decided to go with ½ plywood for the box and 1/8 inch press board for the mid woofer boxs to increase volume and save weight.
their is also a battery box made from the pressboard.
for this boombox the controls are not in their own blocked off section.
after all deductions i have a total volume of 1.0324 ft3 which will work with this woofer and passive combination.
The sub has a selection switch to choose between using the electronic crossover built into the radio or running through infinity coils for a 12db 250 hz crossover point.
for the main crossovers I went with a pair of Sprague musical instrument 3 ways, the mid-woofers were the pain, they have a switchable direct feed, coils and the coils with caps in combo for the band pass.
so the band pass caps are run off the woofer output of the crossovers.
the purpose of the mid-woofers selection switches is so they can be run dirty like a guitar amp, crossed over like a HIFI system and in bandpass for competition, rave, trap n base, etc.
Tips & Tricks:
Vinyl looks great but will have adhesion issues when used in large sheets even with a pre-adhesive surface prep of contact spray.
most reflective or holographic vinyl’s will be more stiff and be rigid like a Metalic base. the marble vinyl’s seem to be made of a plastic. while the flat black I got is a little bit stretchy like a real vinyl and was also the easiest to work with and the most forgiving.
When it comes to enclosures, if I was able to use plastic, I could save about 12 pounds.
About the Designer:
Previously I was a DJ and worked for tech hifi back in the late 80’s, I built sound off comp. cars before their was such a thing.
now days I run a reptile rescue.
Project Parts List:
|RCA AH100R 24 AWG Speaker Wire
|Goldwood GM-65/ Sealed Back 5-1/4″ Midrange 4 Ohm
|Pyle PDBT28 Titanium Tweeter