3U 10inch plate for 2.1 speakers setup / Music Box build

Hello!

After creating my [1.5U plate for 2x 2" speakers](https://github.com/geerlingguy/mini-rack/issues/264), I wasn't satisfied... As you all know, we always want more...

So, I ordered more speakers, a [2.1 BT amp](https://www.amazon.ca/dp/B0DDTXLRNK?ref=ppx_yo2ov_dt_b_fed_asin_title) (2x15 + 30), a [DC12V 5A 60W](https://www.amazon.ca/dp/B01LXI8CHB?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_6&th=1) power supply then I started FreeCAD (well, switched to my almost permanent FreeCAD virtual desktop lol)

All in all, very happy with the result!


I made different kind of enclosures for the 3" speaker, not sure which one is the best sounding as I couldn't compare side by side, but I feel the biggest is the best one for more bass.




I also needed to mount my PSU and an RPi4 to drive the LCD... So, built another 1U plate for that! I have 2 flavors for this one, one with only the RPi4 mount, and one which allows to mount an SSD under the RPi4.




Both models are available for free on makerworld :

[3U speakers plate](https://makerworld.com/en/models/1941749-3u-10-bracket-for-speakers-and-amp-enclosures?replyId=3155243&replyType=1#profileId-2085509)
[1U PSU + RPi4 holder plate](https://makerworld.com/en/models/1941624-1u-10-bracket-for-12v-5a-psu-rpi4-and-ssd#profileId-2085361)

Regards,

Sylvain