Do you use music much on this phone? Do you like it?
I notice it has xLoud, Clear Phase, Clear Bass, Clear Stereo, Surround Sound and Clear Audio. I understand that sometimes these things can be gimmicks / marketing junk but sometimes they can be useful. This is a good feature set for music lovers.
I notice that on GSM Arena tests that they rate the audio quality highly. I follow their guides often but not always. Audio quality is also subjective and occasionally I disagree with their conclusions. (e.g. X10 Mini). They rate the audio quality here if you wish to view it: http://www.gsmarena.com/sony_xperia_l-review-934p7.php