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2Way Bluetooth Speaker Walter Concept 1 — zdjęcie 1
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2Way Bluetooth Speaker Walter Concept 1

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The_Fredrik

The_Fredrik

@The_Fredrik_4069049

System: 2-Way Stereo, 2x 25W RMS. Power: 8.4V Li-Ion (2S) with integrated BMS. Audio: Built-in EQ functions.

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Printables
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Electronics
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Creative Commons — Attribution
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Walter Concept – 2-Way Bluetooth Speaker

Origin: Developed for a friend (Walter). This is the result of that request.

Printing: 0,8mm nozzel infill: 20% 

Technical Specifications:

  • Drivers: 2x 3" Woofers / 2x Air Motion Transformers (AMT).

  • Crossover: 2x 2-Way crossover networks.

  • Amplifier: 2x 25W Class-D with Bluetooth.

  • Bass Extension: 2x Passive Radiators (120 x 120 mm).

  • Enclosure: 3D-modeled chassis with internal damping wool.

  • Control: Rotary encoder with push-button function.

  • Power: 2x 21700 Li-Ion cells (5000 mAh).

  • Features: BMS, battery level indicator, LED status lights (Charging/BT), carrying handle.

Parts: 

Sperkers: 

https://de.aliexpress.com/item/1005005820259984.html?spm=a2g0o.order_list.order_list_main.11.395f1802KP9kIL&gatewayAdapt=glo2deu

Tweeters: 

https://de.aliexpress.com/item/1005002635086050.html?spm=a2g0o.order_list.order_list_main.57.395f1802KP9kIL&gatewayAdapt=glo2deu

BMS:  This 3D print is for 2X 21700 batteries

https://de.aliexpress.com/item/1005004118305965.html?spm=a2g0o.order_list.order_list_main.115.395f1802KP9kIL&gatewayAdapt=glo2deu

Battery Level Indicator:  (2S 8,4V

https://de.aliexpress.com/item/1005008823498187.html?spm=a2g0o.order_list.order_list_main.167.395f1802KP9kIL&gatewayAdapt=glo2deu

AMP: 

https://de.aliexpress.com/item/1005010452131811.html?spm=a2g0o.order_list.order_list_main.244.395f1802KP9kIL&gatewayAdapt=glo2deu

Handel:

https://de.aliexpress.com/item/10000339398345.html?spm=a2g0o.order_list.order_list_main.249.395f1802KP9kIL&gatewayAdapt=glo2deu

LEDs: (6MM 3-6V Color at your discretion / to your liking)

https://de.aliexpress.com/item/1005005536902418.html?spm=a2g0o.order_detail.order_detail_item.3.75ecf19cwXsI5T&gatewayAdapt=glo2deu

Rotary Encoder: (KY-040) 

https://de.aliexpress.com/item/1005006670569682.html?spm=a2g0o.order_list.order_list_main.383.395f1802KP9kIL&gatewayAdapt=glo2de

Bluetooth Antenn: (FPC-IPX1 cable)

https://de.aliexpress.com/item/1005004183534182.html?spm=a2g0o.order_list.order_list_main.378.395f1802KP9kIL&gatewayAdapt=glo2deu

Crossover: 

https://de.aliexpress.com/item/1005006611902939.html?spm=a2g0o.order_list.order_list_main.284.395f1802KP9kIL&gatewayAdapt=glo2deu

Rubber feet: 

https://de.aliexpress.com/item/32807634906.html?spm=a2g0o.order_list.order_list_main.279.395f1802KP9kIL&gatewayAdapt=glo2deu

USB-C port: (4Pin for Data) 

https://de.aliexpress.com/item/1005009753509210.html?spm=a2g0o.productlist.main.1.17ec2a4f6RlN1z&algo_pvid=2a0832fd-42ae-4ef3-9b3d-bfdb1396a8a2&algo_exp_id=2a0832fd-42ae-4ef3-9b3d-bfdb1396a8a2-0&pdp_ext_f=%7B%22order%22%3A%222483%22%2C%22spu_best_type%22%3A%22price%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&pdp_npi=6%40dis%21EUR%213.02%211.25%21%21%2123.69%219.81%21%40211b613917762607621388601edddf%2112000050057623945%21sea%21DE%212053527650%21X%211%210%21n_tag%3A-29919%3Bd%3A38138065%3Bm03_new_user%3A-29895%3BpisId%3A5000000204559012&curPageLogUid=litp05MoRb7g&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005009753509210%7C_p_origin_prod%3A

You can find the Passiv radiators here: 

https://www.thingiverse.com/thing:4825265/files 

120mm X 120 

You can find The volume knob here: 

Assembly Process: Walter Concept

  1. Passive Radiators & Handle: Glue the passive radiators. Bolt the handle in place.

  2. Front Panel: Glue the front panel from the inside.

  3. Interface: Glue the volume control unit (rotary encoder) into the housing.

  4. Internal Structure: Glue the center divider wall into place.

  5. Electronics: Glue the amplifier and battery pack into their designated spots.

  6. First Stage Soldering: Solder the rotary encoder and the Bluetooth status LED to the amplifier.

  7. Wiring & Sealing:

    • Solder the speaker cables.

    • Pull the cables through the holes in the center divider.

    • Crucial: Seal the cable pass-through holes in the divider to ensure it is airtight.

  8. Crossover & Drivers:

    • Solder the speaker cables to the crossovers.

    • Wire the crossovers to the woofers and tweeters.

    • Seal the pass-through holes for the tweeters.

  9. Front Finish: Glue the tweeter housing and the decorative trim to the front panel.

  10. Power & Monitoring:

    • Solder the charging LED and the battery level indicator to the mainboard.

    • Solder the battery (i used 2x 21700 type cells)connections.

  11. Final Step: Glue the back panel to the main housing.

Status: Done

Contact: For questions or support, please contact me at: [email protected]

I actually have the software for this amp. If anyone wants it, just let me know and I can upload it to Google Drive for you!!

Stay tuned for more speaker projects and other electrical DIY stuff!

Tagi

speakerbluetoothportableusbc21700bluetoothspeakerbms2way