This model can easily fit a small amplifier combined with a bluetooth module(without the usb case) to creat awesome sound and also aranges the speakers in a really fun way.To build it i used simply PVC pipe for the speaker enclosure(the diameter of the pipe depends on the speakers you are going to use )and a carbon based plastic for the print. This project cost only 15$
And you are also going to need M3 bolts and nuts.
The BFSSSS stands for Big Fucking Surround Sound Stereo System(of course).
Speakers: I haven't used these exact speakers so I am not 100% sure they will fit mine are 55x55mm
workhttps://www.amazon.de/gp/aw/d/B00WW6KR1C/ref=mp_s_a_1_8?ie=UTF8&qid=1509143922&sr=8-8&pi=AC_SX236_SY340_FMwebp_QL65&keywords=3+watt+4+ohm+speaker&dpPl=1&dpID=51YFHJlR-5L&ref=plSrch