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I agree with Becker, in terms of sound quality, some Bluetooth headphones can’t be compared to wired headphones. However it not happens in every case, just like the one I bought from Abcotechbrand produces great sound as compared to wired headphones. Sometimes analog cables pick up RF interference more frequently and generate a very loud sound without any disturbance and at that time they produce far more superior sound then Bluetooth headphones. However, this is pretty rare, so choose according to the specifications you want.
The Audiophiliac says Bluetooth doesn't compare to wired headphones in terms of sound quality:
"...the processing sounds awful -- gritty harsh, limits bass oomph, and has unpleasant treble -- compared with just running a wire to the device."
"...even when it's used in higher-end gear like the $699 NAD Viso 1 iPod speaker, BT doesn't sound as good as a direct connection."
"...if you care more about sound quality than convenience, use wired connections."