PK1 earphones are the ultimate traditional design with top sound quality. Driving by a head-amp, or even some high output portable audio like Ipod or Iriver, this monster can give you a feeling as top grade hifi headphones, not like average tiny earphones at all. Hi-fi headphone grade sound stage. Transparent, smooth sound. Comfortable traditional design, NOT in-the-ear. Low distortion, high impedance for hi-fi or professional. Ultra low distortion, low impedance for high grade portable audio.Technical details: Impedance:150±20ohm(at 1KHz) Frequency response: 20-24,000Hz Sensitivity:109±3dB(at 1KHz) Distortion: less than 0.1% Head-amp or high output portable audio required. Cable length: 1.2 MWhat have in the package:PK1 earphones.1/4" stereo phone adapter plug. Foam eartips. Storage boxes.
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