Jump to content

Bluetooth Boombox


Recommended Posts

So my neighbor's kid wanted something for blasting music in the football locker room before a game. It had to be fairly small, easy to use, inexpensive, and get as loud as possible. Here is what I came up with.

I started with Bill Fitzmaurice's SLA PA top design. Instead of using the recommended Eminence mid drivers I used Dayton PA165-8 mids. I modified the enclosure design a little bit to lower the tuning to better suit the PA165-8s. The tweeters are the recommended Goldwood Piezos in a three tweeter array.

To power the boombox I'm using a Bluetooth TPA3116 chip amp. This is the one:

http://www.ebay.com/itm/New-TPA3116-Bluetooth-Amplifier-Board-Class-D-50W-2-Amp-Board-CSR4-0-/261802317897

For a power supply I just got a cheapo 19v laptop power brick:

http://www.ebay.com/itm/390480841967?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

The bluetooth amp is super easy to use and gets the job done quite nicely. It can be powered by 10-24 volts DC, so it would be easy to power the thing from 12V in your car or from a small battery pack. Anyway here is how the design came out:

PX7LGBU.jpg

gBVXJt8.jpg

4a8l06g.jpg

The cost for this project was about $95 for the electrical components, about $12 worth of 1/2 Arauco plywood, and a couple bucks worth of honeycomb stamped steel for the grill. Since the amp puts out 50 watts x 2 I'm only using one channel to power the boombox. The terminal cup on the back is wired to the other channel on the amp, so in the future if more output is wanted I can build a second box and then just run some speaker wire to connect them together.

So how does it perform? I'd say quite nicely. Its very clear and has tons of output. When it comes to speaker design, you can design it to be efficient, play low, or have small size, pick any two you want. I went for small size and efficient output, as such it doesn't play real low. The bass is there, there just isn't a whole lot of it, but I knew that would be the case before I built it. None the less, I like the thing enough I'm strongly considering building one or two for myself.

Here are some pictures from the construction:

JwsTbt6.jpg

kVr0bEQ.jpg

UemAjho.jpg

kSMFqBE.jpg

Htbwou6.jpg

S93VKuj.jpg

8wUj8xK.jpg

"Nothing prevents people from knowing the truth more than the belief they already know it."
"Making bass is easy, making music is the hard part."

Builds:

U7qkMTL.jpg  LgPgE9w.jpg  Od2G3u1.jpg  xMyLoO1.jpg  9pAlXUK.jpg

Link to comment
Share on other sites

  • 4 weeks later...

Nice enclosure

Kenwood / HELIX / Linear Power (For The Love Of Music) / Brutal Sounds / OverKill Electric Co 

Questions About Sound Quality ?? Try Here ... Sound Quality, What does it REALLY mean ?? 

SMD SOTM Winner "White Lightning" 1997 GMT400 Chevy Silverado   

"The Green Dickle" 1994 GMT400 Chevy "Phantom Dually"   

Randal's 2007 Chevy Avalanche (we haven't named this one yet)

Dylan's "Brutal" 17 Chevy Cruze RS Hatch                         

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Who's Online   1 Member, 0 Anonymous, 333 Guests (See full list)

×
×
  • Create New...