Usually, in my workshop I am listening to the great radio station Bayern 2 (Yeah for public law media). But sometimes you just need to listen to nice classic english punk music, speed folk or (the one and only) Lemmy and friends.
For that I was looking for a so called boom box to stream to from my mobile, simple, dirty and loud. Good that I was a proud awardee at the HiFiBerry Maker Contest 2017 with my TeakEar build, where I won a nice set of a RaspberryPi Zero with a little HiFiBerry MiniAmp, coming with all what is needed to make that working. 
That should be enough to get proper punk sound in the workshop - and escape the boring normal commercial boom boxes all around.
At a flee market I found a great case for that - exactly one of these that were in the classrooms of my school giving the unbanning gong at the end of each lesson. Nicely with the original non-color textile hiding the speaker and nicely done bended and veneered wood for the elegance.
A great fit for my usecase.
Two 3.3 inch Visaton fullrange speaker are mounted in simple closed chassis. The Raspi with the Amp is mounted between them. All is mounted on a back plate that fits the school speaker chassis. Boombox ready.
From a software perspective, it is there is just a Raspbian running that is configured to act as a bluetooth audio device for my mobile.
I think it is a nice addition to my workshop, with a great ease of use since it auto-connects to my mobile. Does it sound great? Oh no, not ..really. Is it loud? Well, yes, loud enough to not get in trouble with the neighbors. Given it’s size, it is actually impresse.
Surely Lemmy would be fine to play Rock’n Roll through it :)
The only downsize of the whole thing is that it disturbs the radio reception quite a bit, so it is really either or. Any hints how to reduce that?