ESP32 enclosure for JBL Partybox 320

You can plug this little box right in the back usb/3,5mm ports of your JBL Partybox to turn it into ESP32 controlled speaker with HomeAssistant/MusicAssistant integration. I made it for the Stage 320 that I have. Might or might not fit other models. The distance between usb and 3,5mm should be around 23mm (center-to-center) and it should fit. Print settings don't matter that much. I printed with 2 walls, 10% crosshatch and it is more than sturdy enough. No supports are required if your slicer has sacrificial layer for counterbore holes. Otherwise you need small supports for the lid holes. There are some holes for cooling. You might need to adjust the size of the connector holes depending on the ones you have.

Be careful not to hit/put stress on the box once in place or you risk breaking your connectors!

You will need:

• ESP32 S3-R16N8

• PCM5102 DAC (or similar)

• USB-A connector

• very short 3,5mm audio cable

• short dupont wires (or solder short wires straight between esp and dac)

• 2mm cap head screws

Assembly is very simple. Just connect the dupont or soldered wires between the DAC and ESP. You want the wires quite short so they will fit in the enclosure. I used the pinout:

• 3V3 -> VIN

• GND -> GND

• BCK -> GPIO4

• DIN -> GPIO5

• LRCK -> GPIO6

• USB+ -> 5V

• USB- -> GND

Use a small amount of hot-melt glue to hold the components in place. I placed the DAC in the back. Then use some more glue to hold the connectors in place. The 3,5mm needs to stick out around 5mm, but it of course depends on your connectors and you need to measure them. I recommend hot-melt glue here too for easier removal if necessary. Take note to place the usb in the right orientation. Once confirmed the connectors fit just screw the lid on with 2mm cap head screws or a drop of glue if you don't intend to open it later.

Included is a yaml for ESPHome (it's renamed to .txt as printables doesn't seem to accept yaml) that you can use as a basis for your configuration.