This whole build cost me about 63 euro's for each boombox(~66 dollars). But i recon you can lower the price and increase the usability even more by getting a amplifier with built in bluetooth connectivity like This one.

-Retro suitcase. (17,50 euro)

Make sure the suitcase is sturdy enough to support the speakers. I supported the speakers with wooden boards but more on that later. I also recommend to look in your local antique and thrift stores for these or online on eBay since they are hard to find.

-Class D amplifier (I used an altered version of the TA2024). (5 euro)

I do recommend to get an amplifier with a built in Bluetooth board. This spares you a lot of hassle with charging a Bluetooth module and turning it on and off. Furthermore a Bluetooth module and amplifier that are hooked up to the same power source can cause a ground loop issue.

-Bluetooth module. (8 euro)

As said I recommend to get an amplifier with a Bluetooth board built in. But you can still easily make It work with a Bluetooth module.

-Lead gel battery. (20 euro)

You can use a variety of power sources like lipo, lifo, nimh. But what I like about lead gel batteries is that they are cheap, sturdy and you can place them in any position you want. Don’t forget to get a suitable battery charger if you don’t have one laying at home.

-A pair of two way cabinet speakers. (10 euro's)

I would also like to recommend your local thrift store or eBay for these things. I got mine in pairs for about 10 dollars for a set. Make sure to check the speaker itself for damage on the foam ring and the cone. An overall look at the driver and tweeter should be enough to determine if it’s worth buying. It is also really important to look if the speakers are fitted in a wooden frame with screws or bolts. In this way you can be sure to use the frame later on and that you will be able to disassemble the speaker enclosure.

-Decent amount of flexible electrical wire and speaker wire if you can’t salvage the speaker wires of the cabinet speakers.

-If you use a potentiometer, you should get a volume knob. (0,50 euro)

-A simple on/off switch. (1 euro)

-Some small pieces of preferably MDF

-Some strips of velcro (1 euro)





Used tools:

-Coping saw

-Solder iron

-Wire stripper/crimper

-Pencil/marker

-Marking gauge

-Drill and an array of drill bits

-Array of screwdrivers

-Spanners

-File

-Sand paper

-Wood glue