Introduction: Car Speaker Boom Box

About: I am a 19 year old who lives on a farm and I enjoy working with my hands and creating things. I enjoy building models and woodturning pens and hope to create some cool instructables to help share my talents an…

Hi everyone, this is my first Instructable.

I built this boom box out of two speakers I got from the smashed in rear doors of a Ford Transit my family bought. In the process of removing the doors to have them replaced, I salvaged the 2 speakers and decided to build an ugly but functional boom box for my shop. I looked around a little online to find some ideas, this is a link to one of the inspirations for my project.

Most of the idea and inspiration for the project though, came from me simply figuring out how to combine the materials I had into a simple but fairly portable and working boom box.


Skill or at least knowledge of working with wood and tools.

2 Speakers (in this project I used the speakers from a van and they were 25W and 8ohm)

Bluetooth Amplifier board ordered from Banggood for 13 dollars and delivered in 14 days. (Geekcreit® TDA7492P 25W+25W Wireless bluetooth 4.0 Audio Digital Amplifier Board With Case).

Power cord, (you can order one or scrounge for an old computer power cord like I did. The cord I used was a 19v 3160 mA HP laptop power cord since its' voltage was within the range for the amplifier board and had the right plug at the end that fit the board.)

Small boards for frame and interior structure.

Flat thin plyboard to use for the exterior covering.

Screws to construct interior frame and attach exterior covering (I mainly used staples on the exterior covering but screws might be better, the staples were mainly because the wood frame interior was to thin for screws.)

Saws and drills to be able to build the box.

Step 1: Gather Materials

To begin this project I first salvaged the 2 speakers from the van, but they were only the first items I needed.

In total I used

  1. 2 van speakers.
  2. 1 Bluetooth amplifier board (
  3. 1 Laptop power cord (scrounged from family plug bucket).
  4. Multiple small boards, blocks, and sticks.
  5. Thin plyboard for the exterior.
  6. Tablesaw, Jigsaw, Drill, Bandsaw.
  7. Screws and Staples.

Step 2: Measure and Begin Interior Construction

I would highly suggest you measure and plan out how exactly your pieces will fit together, it isn't absolutely necessary though highly advisable. The final approximate measurements for my box's exterior is 11.5in Tall by 23in Wide by 8in Deep. I began by building a wood frame around the speakers and their housing, I measured the height needed to hold the speaker frame. I then cut 4 blocks for the height, 4 for the length, and 6 smaller blocks for the frames depth. (as a side note and tip, these blocks needed to be notched where they connected to the sticks running lengthwise so that there is more places the exterior can be attached to and so there isn't a gap at the ends between the exterior and the frame.)

Step 3: Continue Interior Construction

After beginning by preparing measurements and materials, I screwed the front frame of 2 end sticks and 2 width sticks together first and then the speaker frames to that and then built the rear frame like the front. I then attached them to each other through the use of the 6 small blocks which are set in between the front and rear frame and screwed into. I also had 2 small sticks which sit at the top and hold the amplifier board box in between them, they also had 2 holes drilled and a hole cut for the power plug-in in the stick on the left when looking at the speaker from the front. For the speaker frames I drilled a hole at the top for the wiring to pass through and then sent up to the amplifier board through the small stick. I also built a box out of some extra plyboard, that sits in between the speakers and the amplifier board. I made it as a box to hold my mp3 player (yes they still exist and I have one, I am old school and usually 5-10 years behind the curve.) and to access the auxiliary port on the amplifier board.

Step 4: Finish Exterior Construction

Finally, after building the interior frame I began cutting and attaching the exterior using thin plyboard sheets. The rear wasn't that hard to make I just had to cut it to the right size and then stapled it to the frame, for the front I had to drill 2 holes with the biggest drill bit I could find and then use my jigsaw to cut out the circles for the speakers (as you can see my right side circle didn't turn out that great, just remember this is a functional boom box not a pretty one.) For the left end, top, and bottom covering I simply cut them to size and stapled them to the frame. (Again I would suggest using screws since you can take the box apart if you need to after its' finished instead of using staples.) The right end I made into a door and carrying handle by cutting a rectangular hole at the top of the door, so that I could stuff the plug into the interior when transporting and to access the interior.

Step 5: Finish and Admire and Use Your Creation

Finishing depends on how far you want to take and what your purpose is in making a speaker. I finished with mine like this because I only need it to be functional, I would like to put on a varnish or finish on the exterior and put some mesh in front of the speakers, but I haven't found mesh yet and haven't had the time to varnish the exterior.

After the construction is done you can use your boom box to listen to your epic music or favorite jams, mine has pretty good sound and has its limits, but isn't bad for a total of 15 bucks spent on the project.

Remix Contest

Participated in the
Remix Contest