I recently bought a retro lunchbox at a local thrift store and had a lot of fun making it into a portable speaker. So much fun that I bought another one just so I could make this how-to =)

This video goes step by step through each part of my build. If you have any questions please don't hesitate to ask in the comments. Thank you for watching!

More photos:   / antcaccese  

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Timecodes:

00:00 - Overview
00:34 - Parts
02:11 - Tools Needed
04:04 - Drilling ports in the back
07:36 - Mounting the Bluetooth and Battery Boards
13:58 - Mounting the power switch
15:55 - Mounting the volume knob
18:33 - Placing the speakers
24:33 - Cutting out the speaker holes
32:35 - Wiring
36:14 - First test
36:48 - Final overview

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Parts:

1x Plastic Retro Lunchbox
Approx dimensions 8 1/2" x 7" x 4 1/4"
I used a model made by Aladdin built in 1990
Try to find one at a local thrift store (shouldn't cost you more than a few dollars)

1x Dayton Audio KAB-230v3 2x30W Class D Audio Amp Board
Model #: 325-103
URL: https://www.parts-express.com/dayton-...

2× Dayton Audio PC83-4 3" Full-Range Poly Cone Driver
Model #: 295-154
URL: https://www.parts-express.com/dayton-...

1× Dayton Audio KAB-BE 18650 Battery Extension Board
Model #: 325-113
URL: https://www.parts-express.com/dayton-...

1× 18650 2600mAh Li-Ion Flat Top Battery 3-Pack
Model #: 142-103
URL: https://www.parts-express.com/18650-2...

1× 15 VDC 4A AC Adapter Power Supply with 2.1 x 5.5mm Plug Center Positive (+)
Model #: 120-057
https://www.parts-express.com/15-vdc-...

1× Dayton Audio KAB-FC Function Cables Package
Model #: 325-110
URL: https://www.parts-express.com/dayton-...

1× Dayton Audio KAB-LED Red/Green/Blue LED Package
Model #: 325-111
URL: https://www.parts-express.com/dayton-...

1× M3 Standoff Kit with 8 pcs 16mm Stud / 8 pcs 10mm Stud / 4 pcs Phillips Screws
Model #: 320-3290
URL: https://www.parts-express.com/pc-boar...

1× 2.1mm Panel Mount DC Jack
Model #: 090-5012
URL: https://www.parts-express.com/21mm-pa...

8x #8-32 screws

8x #8-32 washers

8x M3 screws

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Use this to test your speaker phase:

   • speaker polarity check - test tone  
(if the "In Phase" parts in this video sound off then simply switch the + and - on one of your speakers - that should do the trick)

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Credits:

The song played at the end is "Kids" by PUP - they are amazing =)
Please check out their music here:    • PUP - KIDS (Official Music Video)