Noise from woofer

i've been running a single aw1251t with a hct2150 for a few months and it sounded awesome. all of the sudden, i change my head unit and began playing music as usual and i smelled that burnt wire smell. could i have unwiitingly over powered the speaker? if so, is it cheaper to replace or repair?

Double check all of your cables, but it sounds like the power supply may have died. If the sound is like a mains hum, then the power supply will need to be replaced. Is it an internal or external one ? If it's internal, are there any fuses accessible ?

Sounds obvious, but double check the speakers are all correctly plugged in, by removing and re-inserting them. Check the volume controls and and other switches too. Try plugging headphones into the audio outputs to confirm their is actually a signal present, as the speakers may be fine, but the source may be faulty or its configuration changed.