The ART HQ231 features ART’s proprietary FDC (Feedback Detection Circuit), with constant Q circuitry capable of delivering a 3% center frequency accuracy. Combined with a huge array of professional features the HQ231 Dual 31 Band Graphic EQ is ideal for any professional application or touring system.

• FDC Feedback Detection Circuit
• Dual Channel 31-Band Graphic Equalizer
• Output Level VU Metering on Each Channel
• Constant-Q Filtering
• Individual High and Low Pass Filters on Each Channel
• Centre-Detented Frequency Band Sliders
• Independent Level and Bypass Controls on Each Channel
• Relay Bypass – If Power is Lost, Signal Will Still Pass
• Variable Input Controls
• Signal Clip Level Indicators
• Ground Lift Switch
• Internal Power Supply
• Selectable Line Voltage