Is the test tone playing at 40hz or is it a dead track? Try another speaker.
If the file is good, then check to see if your woofer is moving at 40 hz.
This is why I always measure frequency decades one foot from each speaker before I measure at the listening position.
If the file is good, then check to see if your woofer is moving at 40 hz.
This is why I always measure frequency decades one foot from each speaker before I measure at the listening position.