- Impedence: 32 Ohms at 1 kHz
- Sensitivity: 105 +/-3dB
- Frequency Response: 18-24000 Hz
- Standard 3.5mm plug, gold plated
These skull earphones have amazing sound quality! Skull earphones are not easily found and when they are, they are usually cheap earphones made of plastic with only passable sound quality. Not these! Ours are expertly crafted in metal by Pro.2 Audio, one of the most respected OEM/OED manufacturers of audio products in the world. Since 1979, Pro.2 has developed products for the best names in professional audio, and when you hear how these skull earbuds sound, you'll believe it. Outstanding bass response is matched with clear mid-range and crystal clear high end. You will be hard pressed to find better audio quality for the money and we will confidently claim them to be best earbuds under 20 dollars anywhere, bar none. These babies ROCK!