Is this 3D model free to download?

Yes, ZK-MT21, Audio Amplifier is free to download from Cults3D. Open it in the free Thinger app, or use the "Download from Cults3D" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Cults3D. Use the "Download from Cults3D" 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 Rkrause, published on Cults3D. 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.

ZK-MT21, Audio Amplifier 3D printable model by Rkrause

ZK-MT21, Audio Amplifier

Source: Cults3D by Rkrause

The ZK-MT21, Audio Amplifier is a free printable 3D model from Cults3D by Rkrause. Model: ZK-MT21 Input DC 12-24/5A Power Output: 50-100W Step File ready for your custom build out. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Cults3D

30 saves Source: Cults3D Updated 2026-10-04 License: PRIVATE-USE · non-commercial Category: Tools & Workshop

Tags: amp, audio amp, pcb, module

About this model

Model: ZK-MT21 Input DC 12-24/5A Power Output: 50-100W Step File ready for your custom build out. Dimensionally accurate with internal input components included. PLEASE leave a comment!! :)

Frequently asked questions

Is this 3D model free to download?: Yes. ZK-MT21, Audio Amplifier is free to download from Cults3D. Open it in the free Thinger app, or use the "Download from Cults3D" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Cults3D, not by Thinger. We link you directly to the original listing by Rkrause.
Who made this model?: Designed by Rkrause, published on Cults3D. 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.