Just to make sure (in case it is a build up from the previous connection), the exact test should be:
1. Disconnect the cable
2. Turn the device on and you SHOULD hear the popping noise
3. Waiting until it is silent
4. Turn off the amp and wait for a few seconds
5. Turn it back on. If you hear a noise contact Axiom immediately
6. If you DON'T hear a noise, it can STILL be a problem with the Audiobytes. You then need to re-do the same tests with a different input source.

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