Sony MDR-ZX110NC is a basic noise cancelling headset with 3.5mm L-shaped gold-plated stereo mini plug. The noise cancellation reduces up to 95% ambient noise. Its impedance is 45 Ohm, sensitivity is 110 dB, and frequency response is 10 - 22000 Hz.
Sony MDR-XB30EX is a stereo headphone with 3.5mm gold plated connector pin. It has neodymium magnet and 13.5mm speaker diameter for better quality sound. Its frequency response is 4 - 24000 Hz, sensitivity is 105 and impedance is 16 Ohm. The headphone weighs 8g without cord.
Sony Extra Bass (XB) MDR-XB450BV is a headphone with 3.5mm old plated connector pin. It comes with 30mm dynamic driver unit for powerful sound. Its impedance is 40 Ohm, sensitivity is 100dB, and frequency response is 5 - 22000 Hz. Other features include 1.2m cable length
Sony Extra Bass MDR-XB50AP is a stereo headset with 3.5mm Gold plated plug. It comes with 12mm Neodymium drivers for powerful sound delivery. The headset has in-line remote and microphone for hands-free phone calls. Its impedance is 16 Ohm, sensitivity is 110 dB, and frequency response is 4 - 24000 Hz.
Sony MDR-1A is a hi-res headset with 40mm HD driver unit and gold-plated connector pin. The stereo headset has 24 Ohm impedance, 105 dB sensitivity, and 3 - 100000 Hz frequency response. It comes with 1.2m Oxygen-free cable for user convenience. The in-line omni directional microphone provides easy hands-free calling. The headset weighs 225g.