I am a fan of Trance music. I struggled at first to find a helmet that could restore the spectral range of this music. Having purchased a multitude of reférences (headset type) brand SENNHEISER, PHILIPS, PANASONIC sometimes spend up to 69 ... Well I can tell you that the SONY MDRED12LPR (with its big brother the MDR-ED21LP going to my preference ) far surpasses all the competition (and at an extremely reasonable price, which is surprising). The shape of the ear directs all the sonic power to the ear canal and delivers massive sound. It's heavy! No abberation neither in acute nor in severe (Unlike other that break our ears). Another big plus, its performance is excellent (Bon restored volume with low input signal), which is ideal for use with small MP3 player (Indeed, these readers often a low output signal, incompatible with the large stereo headsets, we must then push down to an average result). I use it in public transport (Discreet), connected to the PC or in bed, to help me sleep. Take my advice, buy it, you will not be disappointed (NDR: Helmets SONY earbuds are unavailable at the crossroads and at Darty You believe cà!?).