This is my second created bluetooth speaker. This speaker will replace our old radio at work. This time, I made it without battery's and sounds pretty good.

All the red parts are printed with Ninjaflex for air tight enclosure. Printer settings 0.2, 10% to 15% infill and 3 perimeters. Body and speaker parts needs support.

For the color change you can modify your gcode files on this site:
https://www.prusaprinters.org/color-print/

I have heated up the brass knurls with a soldering iron. They slide right in the sockets. Be sure they are straight.

Parts you need for the build:

Brass inserts 76 pieces
https://www.aliexpress.com/item/100Pcs-M3x5mm-L-5mm-OD-Metric-Threaded-Brass-Knurl-Round-Insert-Nuts-LXM/32693221350.html?spm=a2g0s.9042311.0.0.CsvCxE

m3x10 48 pieces
https://www.aliexpress.com/item/160PC-Metric-Thread-M3-Stainless-Steel-Hex-Bolt-Kit-304-Cap-Nut-Washer-Set-Screw/32794842281.html?spm=a2g0s.9042311.0.0.EMQ1jk

m3x12 24 pieces
https://www.aliexpress.com/item/160PC-Metric-Thread-M3-Stainless-Steel-Hex-Bolt-Kit-304-Cap-Nut-Washer-Set-Screw/32794842281.html?spm=a2g0s.9042311.0.0.EMQ1jk

m3x25 8 pieces
https://www.aliexpress.com/item/160PC-Metric-Thread-M3-Stainless-Steel-Hex-Bolt-Kit-304-Cap-Nut-Washer-Set-Screw/32794842281.html?spm=a2g0s.9042311.0.0.EMQ1jk

m3 nut
https://www.aliexpress.com/item/50Pcs-DIN985-M3-M4-M5-M6-304-Stainless-Steel-Nylon-Self-locking-Hex-Nuts-Locknut-Slip/32821229481.html?s=p&ws_ab_test=searchweb0_0,searchweb201602_2_10152_10151_10065_10344_10068_10342_10343_10340_10341_10084_10083_10613_10304_10615_10307_10614_10301_10059_10314_10534_100031_10604_10103_10142,searchweb201603_40,ppcSwitch_3&algo_expid=bdaddc96-73d7-4f9b-9528-6a99c002cf40-3&algo_pvid=bdaddc96-73d7-4f9b-9528-6a99c002cf40&priceBeautifyAB=0

Electical parts:

Amplifier board
https://www.aliexpress.com/item/TDA7492P-Stereo-Bluetooth-Audio-Receiver-Digital-Amplifier-Board-25W-25W/32834178325.html?spm=a2g0s.9042311.0.0.rszdAr

Speaker drivers
https://www.aliexpress.com/item/2PCS-3-inch-4Ohm-20W-Huge-Neodymium-Full-Range-Speaker-Rubber-Edge-For-SONY/32749712854.html?spm=a2g0s.9042311.0.0.vZbX7h

Passive Bass radiators 2 pieces
https://www.aliexpress.com/item/GHXAMP-3-INCH-Bass-Radiator-Passive-Radiator-Speaker-Rubber-Auxiliary-Bass-Vibration-Membrane-For-Subwoofer-DIY/32823356354.html?spm=a2g0s.9042311.0.0.vZbX7h

Some 22AWG Wire
https://www.aliexpress.com/item/40-Meters-UL-1007-22AWG-5-color-Mix-box-1-box-2-package-Electrical-Wire-Cable/32794086912.html?spm=a2g0s.9042311.0.0.Uap02o

12v 3A Power adapter
https://www.aliexpress.com/item/High-Quality-AC-DC-12V-1A-3A-4A-5A-6A-7A-8A-8-5A-Power-Supply/32807156126.html?spm=a2g0s.9042311.0.0.bFCpQF

12v Push button switch
https://www.aliexpress.com/item/5V-12V-220V-Latching-push-button-switch-locked-16mm-flat-head-fixed-Push-Button-waterproof-LED/32789351190.html?spm=a2g0s.9042311.0.0.bFCpQF

Power Socket DC Block 2-Pin Wire With Nut 5.5X2.1 1 piece
https://www.aliexpress.com/item/Quality-Copper-DC-022B-DC-Power-Socket-DC-Block-2-Pin-Wire-With-Nut-5-5X2/32762835561.html?spm=a2g0s.9042311.0.0.dgxm8s