DIY Bluetooth Speaker CORE – Loa Bluetooth in 3D Print nhỏ gọn 2 driver

CORE- a 3D-Printed Bluetooth Speaker with Dual Drivers

This compact speaker uses two Dayton Audio DMA58-4 full-range drivers to deliver surprisingly powerful and clear sound from a very small enclosure. The fully 3D-printed housing includes a bass-reflex system for deeper low-end, while the internal amplifier and battery setup make it completely portable. Despite its size, the speaker offers punchy bass, clean mids, and crisp highs — perfect for everyday listening on the go.

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BOM:

2x Dayton Audio DMA 58-4

Order Dayton Audio DMA58-4 Full-range Woofer - SoundImports

Sure Electronics 3S 18650 BCPB2 Batteryboard

Order Sure Electronics 3S 18650 Lithium Battery Charger and Balance Protection Board - BCPB2 - SoundImports

Dayton Audio KAB-215v2 2x15W Amplifier

Order Dayton Audio KAB-215v2 Amplifier module - SoundImports

3x High Quality 18650 Batteries

Samsung, Sony, etc.

16x M3x12mm self-tapping screw

100pc M1 M1.2 M1.4 M1.7 M2 M2.6 M3 M3.5 Black Steel Small Phillips Flat Countersunk Cross Round Pan Head Self-tapping Wood Screw - AliExpress 13

~60cm cable (must handle 30W, so doesn't need to be thick)

Order Red/black speaker wire - SoundImports

rocker switch 15x21mm

5/20/100Pcs 2Pins KCD1 Electrical Power Boat Shape SPST ON-OFF KCD11 Rocker Switch Toggle Switch

Red 3mm LED

Diffused 3mm Led Diode Kit White Red Green Blue Yellow Orange 2V 3V Bulb Light Emitting Assortment Set Diy Arduino Pcb Circuit - AliExpress

680 Ω resistor

20PCS 2W 1% Metal Film Resistor 2W 1Ω - 4.7MΩ 1 4.7 10 47 100 200 220 300 330 470 680 910 1K 2.2K 4.7K 10K 15K 100K 470K 1M ohm - AliExpress

JST-PH Plug with wires

5/10Pairs Mini Micro JST 1.25mm / PH 2.0mm / XH 2.54mm Pitch 2 Pin Male Female Plug Connector With Wire Cables - AliExpress 13

5.5x2.1mm DC 099 Power Jack

5PCS/LOT DC099 5.5 mm x 2.1mm DC Power Jack Socket Female Panel Mount Connector Metal DC-099 Open Hole 11MM 5.5*2.1 5.5*2.5 - AliExpress

Total: ~120€

Assembly Guide

1. Screw both drivers into the front plate.
2. Solder ~20 cm wires to each driver (watch polarity and phase!).
3. Route the wires through the cable holes in each of the two-piece enclosure.
4. Glue the front plate into the body using plenty of glue so the joint is fully airtight.
5. Seal the cable pass-through holes with glue for air tightness.
6. Glue the two printed bass-reflex ports into the back plate (again: airtight).
7. Glue the back plate onto the enclosure — seal it properly.
8. Put in the batteries in the battery board. Then Screw the amplifier board and battery board onto the mount.
  • Battery board = long spacers
  • Amplifier board = short spacers
9. Solder speaker wires to the amp output
  • L+ → left speaker +
  • L– → left speaker –
  • Same for right channel
10. Glue the red 3 mm charging LED into the Bottom part, add a 680 Ω resistor in series, then solder a 2-pin JST-PH plug (check polarity) and plug it in to the externel charging LED Port on the battery board (J2).
11. Press the power switch into the Bottom part.
12. Connect battery board output (J11) → amplifier input, with the switch in between.
13. Press in the charging port in the Bottom part and screw it in place. Then connect the charging port to the battery board Wago J4 input (correct polarity!).
14. Glue the Bottom part to the main body (airtight).
15. Charge it up and enjoy the music 

Picture is from the official Sure Electronics Batteryboard PDF