My brother was showing off a bluetooth speaker kit from parts-express, and I was critiquing it. It had only bluetooth input, he wired in a USB port so his phone could charge using the internal battery, and tone controls were simple (bass, treble, fader, volume). I asked about several things: line in - nope, music on memory stick - nope. I suggested things I would do if I built one and he challenged me - so build one.
I had a pair of Bose 101 speakers that have been sitting in storage for over a decade. I bought another pair that was blown (so I could build a matching control box). I picked up a pair of Pyle subs and built a box, then a frame for the whole thing.
Beocreate + raspi 4 + touchscreen + Ryobi 40V battery + automotive 40v to 13.5v converter = 
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Michael Richey That's the Raspberry Pi 7" touchscreen (the official screen). I installed a rotary encoder to act as volume control. It's heavy to lug around - but darn is it loud!
Internally I have a 32GB memory stick that holds most of my music collection. I don't even need to plug anything in or connect to bluetooth to play most of what I like.....it's like a portable jukebox.
Yes, using HiFiBerryOS! -
All Bright That's a big project! Nice :)
Did you use HiFiBerryOS or something else?
What touchscreen is that? -
All Bright Nice one. I like that it is portable, too. Congratulations!
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