Input Impedance
Balanced: 40kΩ, Unbalanced: 20kΩ
Product Overview
The Harmonai D2231 is a professional dual 31-band graphic equalizer with integrated limiter and noise gate, built in a standard 3U rack-mount chassis. Its frequency response spans 20Hz–20kHz, delivering up to 115dB dynamic range, THD below 0.005%, and channel isolation exceeding 90dB — enabling precise, nuanced frequency adjustment and signal processing for professional audio systems. Ideal for live stage sound, recording studios, and conference rooms.
Output Impedance
Balanced: 200Ω, Unbalanced: 100Ω
Maximum Input Level
>+21dBu (balanced or unbalanced)
Frequency Range
20Hz–20kHz (+0.5dB/−1dB)
Dynamic Range
109dB / 115dB
Signal-to-Noise Ratio
95dB / 100dB
Total Harmonic Distortion (THD)
<0.005%
Channel Isolation
>90dB
Power Supply
220V, 24W
Number of Bands
Dual 31-band equalization
Additional Features
Integrated limiter and noise gate
Chassis Format
Standard 3U rack-mount
Typical Applications
Suitable for professional stage sound reinforcement systems, studio monitoring chains, large conference rooms and multi-purpose halls, bar and Livehouse live mixing, and cinema playback system frequency correction. The dual 31-band precision equalization, combined with the built-in limiter and noise gate, comprehensively optimizes signal chain integrity.
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