Is this 3D model free to download?

Yes, Back Horn Speaker BL1 - Bluetooth, Active, Passive is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by guppyk, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Back Horn Speaker BL1 - Bluetooth, Active, Passive 3D printable model by guppyk

Back Horn Speaker BL1 - Bluetooth, Active, Passive photo 1

Back Horn Speaker BL1 - Bluetooth, Active, Passive photo 2

Back Horn Speaker BL1 - Bluetooth, Active, Passive photo 3

Back Horn Speaker BL1 - Bluetooth, Active, Passive photo 4

Back Horn Speaker BL1 - Bluetooth, Active, Passive

Source: Thingiverse by guppyk

The Back Horn Speaker BL1 - Bluetooth, Active, Passive is a free printable 3D model from Thingiverse by guppyk. UPDATE 28 Nov 20: I have just uploaded Version V2.0 - a complete redesign using a 3.3" driver UPDATE 18 Dec 20: I have just added a wiring diagram - Enjoy! Just a super stylish. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

1,789 saves Source: Thingiverse Updated 2026-09-25 License: CC-BY · commercial OK 3 makes Category: Gadgets & Electronics

Tags: active, altavoz, altoparlante, amplifier, bass, bluetooth, box, driver, enceinte, enclosure, Ender 3, haut-parleur, hifi, horn, lautsprecher

About this model

UPDATE 28 Nov 20: I have just uploaded Version V2.0 - a complete redesign using a 3.3" driver UPDATE 18 Dec 20: I have just added a wiring diagram - Enjoy! Just a super stylish, super cheap, fully printable and surprisingly good sounding back loaded horn Bluetooth speaker using a simple 2 1/2" driver and a USD 1 Bluetooth board and amplifier. First a little theory: What is a back loaded horn speaker? Think of it as a reversed megaphone or gramophone. A (front) horn loudspeaker uses an acoustic horn to increase the overall efficiency of the driving element (i.e. the sound coming out at the front). A back loaded horn speaker does pretty much the same. However, here the horn is mounted at the back of the loudspeaker. So you get the direct output from the front of the driver PLUS the one from …

Frequently asked questions

Is this 3D model free to download?: Yes. Back Horn Speaker BL1 - Bluetooth, Active, Passive is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by guppyk.
Who made this model?: Designed by guppyk, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.