Why is my car amp on but no sound?
Check for blown fuses and if necessary, replace them. Add the audio cables to the amplifier first and make sure the cables are securely connected. Then test the amplifier to make sure there are no issues. Add the speaker wires one at a time to make sure the connections are accurate and secure.
Why is my amp getting power but not my subs?
Commonly, a blown subwoofer, issues with the connection and wiring, volume and other settings, input problems, short circuits and issues with the speaker can be some potential reasons behind a subwoofer not working even if the amp has power.
How can you tell if your amp is blown?
How do you diagnose an amplifier? Test the sound by unplugging the sound cables or colored RCA wires. Hissing and crackling are often easy to fix by rearranging the wires or getting complimentary speakers. If the noise doesn’t stop, then you probably have a faulty amp to replace.