Parameters of speaker

The speaker is one of the most weak parts in the audio equipment, and it is one of the most important parts for the sound effect. There are a wide variety of speakers, and the price is very different. Audio frequency electric energy through electromagnetic, piezoelectric or electrostatic effect, so that the paper bowl or diaphragm vibration and resonance with the surrounding air (resonance) and sound. According to the mechanism and structure of moving coil (electric), capacitance (electrostatic), piezoelectric (crystal or ceramic), electromagnetic type (spring type), ion electric and pneumatic loudspeaker, loudspeaker has good acoustic performance, firm structure, low cost, wide application according to the sound radiation; the material of paper pot, horn type, diaphragm type loudspeaker; according to the cone shape round, oval, double cone and rubber folding ring; according to the working frequency of sub bass, baritone, soprano, recorder, into some special TV special, ordinary and high fidelity speakers; according to voice coil impedance low impedance and high impedance; according to the effect of sound environment and direct radiation. 　　

The rated power of the speaker is refer to the speaker to the output power of the work for a long time, also known as no distortion power, which are generally marked on the nameplate of the rear end of the speaker. When the speaker works at the rated power, the voice coil will not produce overheating or mechanical overload and other phenomena, the sound does not show distortion. Rated power is a kind of average power, and actually speaker in state power, it change with the input audio signal strength, in weak music and sound signal peak pulse signal will exceed the rated power many times, due to the short duration without damage to the speaker, but there may be distorted. Therefore, in order to ensure that the peak value of the pulse is still good enough to get the sound quality, speakers need to stay enough power margin. The maximum power that the general speaker can follow is 2-4 times the rated power.