gsmarena tested audio quality of both GNex and sensation XL.
there's no test result for rezound so i used sensation XL's test result since it has beats by dr dre.
frequency response
GNEX +0.11/-0.69 (+0.41/-0.61-headphone)
Sensation XL +3.35/-0.42 (+3.77/-0/54 headphone)
Sensation XL is much louder for sure, but when it comes to equal loudness (treats all sounds equally, so you hear the music as it was recorded, which is what a good piece of audio equipment should do)
Noise level (higher the signal-to-noise ratio, the less obtrusive the background noise, hence the reproducing equipment is of a higher quality)
GNex -90.6 (-89.5 headphone)
Sensation XL -85.2(-80.2 headphone)
Dynamic range (larger the dynamic range the better the device performs at reproducing quiet and loud sounds simultaneously.)
GNex 90.6 (89.5 headphone)
Sensation XL 87.2 (81.2)
Total Harmony distortion & Intermodulation distortion
( a measure of the unwanted altering of the original signals so the lower the number, the better the sound reproduction)
GNex 0.0085 THD (0.097 THD with headphone) 0.014 IMD+noise (0.267 IMD+noise with headphone)
Sensation XL 0.025 THD(0.072 THD with headphone) 0.084 IMD+noise (0.569 IMD+noise with headphone)
Stereo crosswork (the higher the absolute value, the better the stereo.)
GNex -90.8 (-63.5 headphone)
Sensation XL -75.1 (-64.2)
Samsung Galaxy Nexus review: Opening new doors - GSMArena.com
HTC Sensation XL review: Music and the beast - GSMArena.com
real audiophiles know that it's the perfectly clean, untouched audio output that makes a great music player.
so still believe rezound's audio is better??
If you pay closer attention, you might notice a suspicious resemblance between the results produced by the Samsung handsets and the iPod unit we were testing. We were caught off guard too and we even thought we had some kind of a problem with our test setup. But after we checked on the matter, it turned out that Samsung are in fact supplying Apple with audio processors.
so I guess if GNex's audio is so bad lol i hope u throw away ur IPOD too.