mpx220 headphone sound quality

What can you tell me about the quality of the sound in the headset while listening to mp3s? I know it is stereo. I heared mp3s in SE k700i (also stereo). Can mpx220 be compared with k700i (at this point)? Is the sound better or the same. Also, can the sound be compared with the one of an iPOD (or a CD player).

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Actually, I have stero headphones in mine, but it doesnot come out as stereo, it just splits the sound into bothe ear buds, I have heard that bluetooth (stereo) headsets work on it though.