Standard quality settings about .2 - .3 layer height for most parts.

Radiator rubber -> TPU (no more stiffnes than 40D. 40D is too stiff in my opinion but works). If you can make this part with paper or buy radiator for 50mm mounting hole then you should consider this solution. Layer height <= 0.10mm

Rubber buttons -> TPU+PETG/PLA/Whatever. Print it with two materials. Setup buttons base as TPU/FLEX and buttons signs as PETG or PLA. Combine them in your slicer and print multimaterial. There should be only one layer of signs. Just for visibility.

LensCap -> totally optional. Translucent or transparent cap for led.

Radiator weight -> depends on you. Mine is printed with weight above 2g and glued 5g iron rim weight. Its below response frequency. If you want keep your radiator resonance closer to 180HZ (JBL low response frequency) then use 1g or 2g but passive radiator works like bass reflex. Heavy radiator kicks in when playing loud and makes better lowest response. Doubling PR response with bass reflex is waste. Your slicer will tell you how much your part will weight. Adjust infill, perimeters and Z scale.

Radiator side of enclosure -> please consider printing "tongue" with TPU.

Only PCB enclosure requires support for microphone mounting socket.

Post-Printing

Buttons
Push buttons rubber with signs facings outside into slot inside PCB enclosure part.

Connections
You need to find way to connect your PCB with driver. In Driver Side part there is hole for cable. I did new cable with jst socket for driver original plug and on the other side with plug for PCB socket or solder new cable to PCB connector pins but from other side. Then seal hole.

PCB with accumulator
Put PCB into PCB enclosure. Push it little to the side of jack/usb and use little force to push PCB down. Find comfy place for accu and make sure driver can be connected to PCB. Place Lid part into its place and screw it on with 3 M2x19 screws.

Driver
Place JBL driver into its place in Driver Side part and use m3 screws with nuts to mount driver. Consider glue for nuts.

Radiator
Glue your radiator weight into radiator rubber. Then glue rubber to Radiator side enclosure part from inside. Or make that part with paper Or if you are lucky buy radiator (50mm mounting hole)

Glue everything together
Connect cables and glue parts together. Use some clamps or weights to hold glued parts in place and wait. Rubber foots are optional.