Hi, I’ll be posting this on a few forums as I have no idea where the problem lies. Briefly, my project is to make a wifi podcast radio that plays the most recent podcast and then skips to the next most recent one from a stream source and with capacitive touch buttons for control. Okay so I eventually got my hardware working. I was following an Adafruit tutorial (NPRone raspberry pi radio) and now I’m using Pi music box with the same hardware used in their tutorial so I have the adafruit 98357a 3w class D mono amplifier (works as hifiberry dac i believe?), a raspberry pi zero W and adafruits 3w 4 ohm enclosed speaker set (only running one speaker for the setup through 2 channels) . I installed l2c with the script that is recommended to use to get it started, everythings working on the latest version of pi musicbox.
last night i forgot to shutdown my Pi but nothing was streaming or playing anyways but when I woke up I smelled burning and scratching noises from speaker. It was hot like an oven but the amplifier was cool and the Pi was fine too, just the speaker. I learned that the voice over coil was burnt out, I could feel it and when it cooled down I went to try everything again and play a .mp3 stream and it played sound but it was horrible like a broken record in a tin can. So that speakers blown, I tried hundreds of things to figure out why that happened today, eventually I played a stream, paused it and came back a few moments later and felt the NEW speaker I put in that I tested and it was working perfectly it started over heating now. It only got hot for a moment, it was enough to burn this speaker too, its not as bad as the other speaker but it burned the voice over coil mostly, after letting this one cool down it works again but it sounds like a cheap $.50 speaker and its overall volume and quality is lower so it’s also now broken. I tried replicating the same problem with either of these burnt speakers by leaving a stream paused or playing music for hours and the same problem doesnt occur again, i’m almost positive it happened when a stream was paused but the speaker and or amp is still on.
I have Noooooo Idea where to start and I’m just new to all this. Can anyone help troubleshoot? Also the amp works fine and was set to default 9db gain, I tried lowering it to 6dB with both a good speaker and the broken one and it didnt seem to lower the overall volume anyways, its not an overusage of power problem as its a 3w 4ohm rated speaker and the amp doesnt exceed 3watts itself. I need new speakers!! Please help!!