1.Frequency range: the human ear's audible range is 20-20000Hz, but due to the limitation of the cabinet size, no speaker can achieve such a wide range, even the dual 18-inch ultra-low frequency used in large-scale performances The speaker is also very good at 30Hz, and the speaker in the field of consumer electronics, even a mobile phone or computer, is generally small, the frequency response is not easy to achieve below 100Hz. (Writing this paragraph means that if any speaker reads 20-20000Hz, then they must not even test it, it is a pitman.) There are multiple speaker units inside which are two-way or three-way speakers, which are relatively single The frequency range of a crossover speaker should be theoretically wide.
2. Frequency response curve: Professional manufacturers will provide this. The abscissa is the frequency and the ordinate is the sound pressure level. In theory, this curve is straight and better, and it can play the music more authentic. However, no audio manufacturer can be completely straight. In addition, some people prefer more low frequencies, and some people prefer more high frequencies. This is like eating differently, so there is no strict perfect frequency response curve.
3. rated power: the same room, the same size unit speakers, high-power speakers are even more powerful.
4. Sensitivity: refers to the sound pressure level that the speaker can emit when the power of 1 milliwatt is input (the unit of sound pressure is decibel, the larger the sound pressure, the louder the volume), so the higher the general sensitivity, the easier the speaker is to drive. Two speakers with the same rated power, louder speakers can achieve greater sound pressure levels.
5. Driving method: Active or passive active speakers have built-in amplifiers. Passive speakers need additional amplifiers. See clearly when choosing.