The Yamaha Q2031B Dual-Channel Graphic Equalizer is a stereo (two-channel) 31-band graphic equalizer for professional audio applications. It's a rack-mounted device primarily used for fine-tuning acoustic characteristics in live sound, recording, broadcasting, and PA systems.

It's in working order and in excellent condition.

Each channel features 31 bands (1/3 octave) of sliders, allowing for precise adjustment of the full frequency range from 20 Hz to 20 kHz.

Switchable between ±6 dB and ±12 dB, it offers everything from subtle tone adjustments to major corrections. It also supports feedback prevention and wideband adjustments.

Enables fully independent EQ adjustment for stereo signals or two separate audio sources. Each channel features a separate 31-band EQ and variable high-pass filter.

Each channel features a continuously variable high-pass filter from 20 Hz to 200 Hz, reducing boomy low-frequency sounds and unwanted low-frequency noise.

High-quality design with a total harmonic distortion of less than 0.05% and a noise level of less than -96 dB. Unwanted noise and distortion are suppressed even when the sound is altered.

Supports balanced connections and is equipped with XLR and 1/4" TRS phone jacks. Designed to work well with professional mixers, amplifiers, and outboard equipment.

EQ ON/OFF switch for instant effect comparison.

Peak indicator allows you to visually check excessive input.

Speaker protection with a circuit that mutes the output for a few seconds after power-on.

Rugged housing compatible with 19" rack mounting.

EQ Bandwidth: 31 bands, 1/3 octave (20 Hz to 20 kHz)

Yamaha

Channels: 2 independent channels

Adjustable Range: ±6 dB / ±12 dB

High-Pass Filter: Variable from 20 Hz to 200 Hz (-12 dB/octave)

Total Harmonic Distortion: <0.05%

Noise Level: -96 dB or less

Input/Output Connectors: XLR / 1/4" TRS balanced

Power Consumption: Approximately 20 W

Size: 19" rack, 2U

Weight: Approximately 4.0 kg

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