The Hybrid S-EQ231A is a professional dual 31-band stereo graphic equalizer designed for precise audio system tuning and tonal control in live sound, broadcast, and installation environments. With accurate constant-Q filters, balanced I/O, and ultra-low distortion circuitry, it delivers clean, transparent sound shaping and reliable performance. Built into a durable 2U rackmount chassis, the S-EQ231A is ideal for engineers, venues, and rental setups demanding flexibility and control.
Specifications
- Channels: 2 (Stereo)
- Bands per Channel: 31 (1/3 octave)
- Frequency Centers (ISO standard):
20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800,
1 k, 1.25 k, 1.6 k, 2 k, 2.5 k, 3.15 k, 4 k, 5 k, 6.3 k, 8 k, 10 k, 12.5 k, 16 k, 20 k Hz - Boost/Cut Range: ±12 dB
- Filter Type: Constant Q
- Frequency Response: 20 Hz – 20 kHz (±0.5 dB)
- THD + N: < 0.005%
- Signal-to-Noise Ratio: > 95 dB
- Input Level (Max): +20 dBu
- Output Level (Max): +20 dBu
- Input Impedance: 20 kΩ balanced
- Output Impedance: 200 Ω balanced
- Low Cut Filter: 40 Hz, 12 dB/oct switchable
- Level Controls: Output gain ±6 dB
- Indicators: Power, Signal, and Clip LEDs
- Bypass Switch: True bypass per channel
- Connections:
- Inputs: Balanced XLR & ¼″ TRS
- Outputs: Balanced XLR & ¼″ TRS
- Power Supply: 100–240 V AC, 50/60 Hz auto-switching
Features
- Dual 31-band constant-Q graphic equalizer
- ±12 dB cut/boost per band for detailed tonal shaping
- Switchable 40 Hz low-cut filter to reduce subsonic rumble
- Balanced XLR and TRS inputs/outputs for clean signal path
- Independent bypass and gain controls per channel
- Rugged 2U rackmount chassis for professional touring and installations
Applications
- Live sound system tuning and room correction
- Front-of-house EQ or monitor equalization
- Studio and broadcast system tone control
- Installed venues, churches, and theatres
