Basic setting function of professional power amplifier

From a functional point of view, most current power amplifier products already have the following functions.

Electronic crossover: There are three choices for this function setting: FULL-full tone; HP: Qualcomm passes a frequency above the crossover point (such as 80Hz). This setting is mainly used for mid-range and high-range speakers; LP: Lowpass one Only frequencies below the crossover point (such as 80Hz) are allowed to pass. This setting is mainly used for woofer speakers. Some of them are also set as crossover points for debugging, which can be set according to different system designs, and some are fixed at several frequencies of 80Hz, 100Hz, and 120Hz.

Signal input selection: There are two input methods: RCA signal (low voltage) and host speaker cable (high level). To get good sound quality, you can choose RCA signal input (ideal frequency response and excellent signal-to-noise ratio, but only if the host has RCA output). If the host has no RCA output or retains the original host, only use the high Amplifier for level input. In addition, many power amplifier products have one or two sets of signal output (lineouput), the signal is transmitted to another power amplifier, not only can save the cost of the splitter, but also can guarantee excellent sound quality, because different businesses are in Different methods are adopted when the signal output is insufficient for distribution, and some processing methods will deteriorate the sound quality.

Input gain adjustment (Gain): This knob is used to adjust the input voltage of the power amplifier and the signal voltage transmitted from the host to achieve the optimal matching state to ensure that the sound will not have any distortion.

Bridged output (bridged): When the power amplifier uses the bridge connection method, the output power can generally be increased by 2 times, so that it has another purpose when it is needed (for example, to push the subwoofer).

Tone adjustment: Quite a few products are equipped with bass (Bass) and treble (Tweeter) adjustments, which can be boosted or attenuated at two frequencies of 45Hz and 10KHz respectively. , Deep, treble is more clear and transparent.