Introduction to Hi-Fi Headphone Specifications

Impedance

Pay attention to the difference between the meaning of resistance and resistance. In the world of direct current (DC), the effect of an object on the current obstruction is called resistance. However, in the field of alternating current (AC), in addition to resistance, capacitance and inductance also hinder the current. Flow, this effect is called reactance, and the impedance we call daily is the vector sum of resistance and reactance.

 Sensitivity

The sound pressure level that the earphone can emit when 1 milliwatt of power is input into the earphone (the unit of sound pressure is decibels, the higher the sound pressure, the louder the volume), so generally the higher the sensitivity and the smaller the impedance, the easier it is for the earphone to make sound. The easier it is to drive.

 Frequency Response

The sensitivity value corresponding to the frequency is the frequency response, and when drawn into an image, it is the frequency response curve. The range that human hearing can reach is approximately 20Hz-20000Hz. Nowadays, mature headphone technology has met this requirement.

 Headphone wire

Most headphone cables are made of copperRaw materials, the general purity (generally expressed in several N, such as 4N, 6N...), the higher the conductivity, the better the signal distortion, the common ones are:

TPC (electrolytic copper): purity is 99.5%

OFC (oxygen-free copper): purity 99.995%

LC-OFC (linear crystalline oxygen-free copper or crystalline oxygen-free copper): purity above 99.995%

OCC (single crystal oxygen-free copper): the highest purity, above 99.996%, and is divided into PC-OCC and UP-OCC