At the moment I don’t have the dimensions, when come back to the workshop I will post it here.
For the speakers I used Aiyima speakers, you can find it in aliexpress, I was using it in some others builds always with a very good quality/price relation. Each speaker has a 4 ohm impedance.
The subwoofer is a 200w and the yellow one are a 80w coaxial full range speakers.
I used a basic 24V-260w power supply but i added a filter for the DC after it to avoid noises, if you follow the DC cables you will see the filter.
I also used a filter for the line in (not installed when I take the picture) that isolate the source from the speaker. I tested it with a vinyl player and it filtered the noise very well.
For the top control panel, I added some buttons, you only have to weld one resistor with the proper value for each button and that’s all. At the beginig I become a little bit crazy because the manual is not correct and part of the circuit that the manual say that do you need is already implemented in the board. I recommend to Arylic to update it.
I joint the led lights in one rgb led (middle one in the control panel). It’s true that i’m not going to use the USB port and i missed that one, having 3 modes and 3 lines in the rgb led. If you want 4 colors probably you can use a RGBW led and have all the modes in one led. There are other options also to have diferent colors.
I hope all this information helps you, if you have any quation regarding any specific component don’t hesitate to ask me.