The active split of the sound is also called active crossover. The audio signal of the host is divided in the host CPU before being amplified by the power amplifier circuit. The principle is that the audio signal is sent to the host central processing unit (CPU) in the host CPU. The audio signal is divided into low frequency signal and high frequency signal according to the frequency response range, and then the divided two signals are respectively input into the amplifying circuit and separately amplified. The frequency dividing mode is digital.
Passive split is also called passive crossover. The audio signal is amplified by the power amplifier circuit and then divided by the passive crossover and input to the corresponding treble or woofer. The principle is that the high-frequency sound is filtered by the inductor circuit. Low-frequency sound, then input the low-frequency sound to the low-spelling speaker. The low-frequency sound is filtered by the electrolytic capacitor, and the high-frequency sound is left, and then input to the tweeter. The frequency division method is adjusted by the variable resistor to be fuzzy.
The active split must be the host with the active crossover function or the digital active crossover after the host audio output. The high-end models of the Alpine host have the active crossover function. It is characterized by the accuracy of the crossover point. After the frequency, the sound is clean.
Active speakers are used by many people. The small speakers of the Walkman are active speakers. In addition, a set of amplifiers is added to the general speaker box. When we want to use it, we only need the front stage and not the rear. level. The active internal use of electronic sound distribution, and save the trouble of matching the appropriate post-level; passive speaker is a general speaker, which has only one voice network.
The active preamplifier is the IC, transistor, and vacuum tube pre-stage that we generally see. When the input signal is output, it has amplifying effect. This preamplifier can play a high dynamic performance, and the characteristics of each model are different. Tone. The passive preamp is the simplest, it is a volume control attenuator, its output will be smaller than the input, but the sound rendering is less, usually only a slight difference, not like the active preamplifier difference is quite large .
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