What is an exciter

The exciter is a kind of harmonic generator, a sound processing device that uses human psychoacoustic characteristics to modify and beautify the sound signal. Various methods such as adding high-frequency harmonic components to the sound can improve the sound quality, timbre, enhance the penetration of the sound, and increase the sense of space of the sound. Modern exciters can not only create high frequency harmonics, but also have functions such as low frequency expansion and music style, making the bass effect more perfect and the music more expressive.

Use exciters to improve the clarity, intelligibility and expressiveness of sound. Make the sound more pleasant and pleasant, reduce listening fatigue and increase the loudness. Although the exciter only adds about 0.5dB of harmonic components to the sound, it actually sounds like the volume has increased by about 10dB. The auditory loudness of the sound is obviously increased, the three-dimensional sense of the sound image, and the separation of the sound are increased; the positioning and layering of the sound are improved, and the sound quality of the replayed sound and the copy rate of the tape are also improved. Because acoustic signals lose high-frequency harmonic components during transmission and recording, high-frequency noise occurs. At this time, the former uses an exciter to compensate the signal first, and the latter can use a filter to filter out high-frequency noise, and then create a high-frequency component to ensure the playback sound quality.

The adjustment of the exciter requires the sound engineer to judge the sound quality and timbre of the system, and then adjust it according to the subjective listening evaluation.
The E-28 audio exciter has three controls for each channel. (Tuner) The frequency range selected for processing by changing the intercept point of the high-pass filter. HIGH MIX (high frequency mixer), LOW MIX (low frequency mixer) set the degree of high frequency, low frequency processing. The low frequency has its own independent processing, and the 50 / 100Hz corner frequency can be adjusted with a switch. PROCESSOR processing control allows you to mix the two effects to achieve a harmonious balance of music. When rotating clockwise, the classical acoustic effect of "CLASSICAL" decreases and the amount of excitation gradually increases. There is also a 40Hz high-pass filter circuit (cut off the useless low frequency) to protect the speaker from being damaged by sub-low frequency.

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