This device holds out its promises. The sound quality, especially when the device is associated with a source allowing use of APTX codec. I had the opportunity to compare on the same wireless stereo music system issued with a recent but APTX bluetooth, bluetooth with APTX (what makes this unit) and the Kleer transmission system which equips some premium channels. If this is never the day and night between these different listening experiences, we realize faster than bluetooth pretty simple sound spatialization is very small, extreme frequencies (basses and shrill) are sacrificed; with APTX, it's like going from a listening in mono to stereo listening. Some specific sounds (eg the sound of a thunderstorm in the middle of a song) suddenly become much more audible and identifiable. It is near CD quality (provided that the file being played is a good definition), but we're not there quite yet, contrary to what some may say here or there. The Kleer system that provides uncompressed transmission, returns for its full CD quality and comparison with bluetooth APTX certainly reveals similar audio experience at first, but with better dynamic sound and a wider stereo image Kleer after a more attentive listening on a wider panel of tunes.
