audio equalizer; sound equalizer
Technical term for a device that adjusts the balance of frequency components in an audio signal. Used in audio engineering and music production.
See also: 等化器
I used an audio equalizer to boost the bass.
等化器 is a broader term for any equalizer (e.g., in signal processing), while 音色等化器 specifically refers to an audio equalizer for sound frequency adjustment.
Compound of 音色 (おんしょく, 'tone color, timbre') and 等化器 (とうかき, 'equalizer'). A technical term likely coined in modern Japanese to translate the English 'audio equalizer'.