Before I received my MacBook Pro, I heard complaints about the
quality of the right speaker. Many reports indicated that the
speaker sounded overdriven, and distorted. I didn’t notice this
initially, until I heard some system sounds at full volume. The
system startup sound didn’t sound like this either.
Well, seeing how I have measurement microphones and write
acoustic measurement software, verifying a discrepancy was the
logical next step. Simply place the measurement microphone about
1” away from each speaker and compare the result.
To my own ears, the right speaker was noticeably quieter, and
lacked bass when compared to the left speaker. Also, it sounded
horribly distored. I didn’t really need to analyze the graphs to
notice that there was an issue, but I captured some anyway.