DIY stereo wireless bluetooth speaker 2x15W.Printing time whole case is about 2 days with 0,2mm detail.

What I used:

2x speakers - Visaton FR 8 JS 8 OHM

And I bouth at aliexpress-

2x LEORY 12V DC 6800mAh Lithium Rechargeable Battery Li-ion Super Electrical Batteries Pack For Wireless Transmitter CCTV Camera (be careful, actually it´s just 12V 2800mAh)

1x TPA3110 2 x 15W Bluetooth Audio Power hifi Amplifier Board for DIY Speaker A3-008 (It has little noise. I recomend to buy some more expensive)

1x 5Pair Male Female DC 12V 24V Connector Power Jack Charging Slot Adapter Plug Verbinder Interconnects Connectors CCTV 5.5 x 2.1mm

1x 3S 3 Series Lithium Battery Capacity Indicator Module 12.6V Blue Display Electric Vehicle Battery Power Tester Li-po Li-ion

If I forgot somethink, lets ask me.