This is an "easy to use" music player with a reasonable sound quality. The main objective at the start of the project was that the box had to have only one cable, the mains. The way to achieve this was putting a chromecast audio inside the box. The rest of the electronics are just a low budget ebay class D amplifier and the power supply.
Step 1: Bill of Materials
2x 800x600x10[mm] playwood, €14.5.
2x 2400x33x9[mm] samba wood strip, €5.9.
2x 2400x98x9[mm] samba wood strip, €11.9.
Speakers, €26,90. https://www.amazon.es/Kenwood-KFC-E1365-Altavoces-...
Chromecast Audio, €39.
Amplifier, $9.96. http://www.ebay.com/itm/2-100W-TPA3116-D2-Dual-Cha...
Rotary Switch for volume, 2 pole 6 shorting (make before break), $9. http://www.ebay.com/itm/High-quality-Rotary-swtich...
Power Switch, €4. Local store.
Grill Fabric, €4. Ikea.
Transformer, €0. From an old halogen ceiling lamp: toroidal, 230:12,200VA.
Power supply parts, aprox. €10. From scrap and e bay.http://www.ebay.com/itm/401046113133
Step 2: Enclosure Design
The loudspeaker enclosure type I have chosen is sealed instead of ported so, the only parameter to dimmension is the volume of the box.
Step 3: Playwood Frame Building
The frame is joined with nails and glue.
Step 4: Covering With Samba Strips
The strips are fastened from inside the box with screws.
Step 5: Building the Speaker Holders
Step 6: Building and Attaching the Feet
Feet are made using a plug cutter and remaining samba wood.
Step 7: Building the Front Panel
Step 8: Fuse Holder, Mains Cable Hole and Transformer Holder
Step 9: Varnishing
Step 10: Foaming the Speakers
Step 11: Building the Grill
Step 12: Wiring and Assembling Electronics
The volume potentiometer has been substituited by a 6 positions 2 circuits switch that also has been wired to allow easy assembly in the front panel.