I used them on a cheap speaker in the Arcade (Raspberry PI) Project case. But they are loud enough and have a decent sound quality. It's 12v which the PI doesn't normally provide so you will need a 12v adapter (not included) or I used a 5v and 12v arcade power supply, a pc power supply will also work for both . A few scratches/dents and dents but I hid them anyway.
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