The dbx 1231 is a dual-channel, 31-band graphic equalizer designed for professional sound reinforcement and high-end audio installations. Part of the dbx 12 Series, it is known for its “straightforward” controls and high precision, featuring 45mm faders and switchable boost/cut ranges.
Key Features
- Dual 31-Band Channels: Provides two independent channels with 31 bands each, spaced at 1/3-octave ISO frequency centers (20Hz to 20kHz).
- Precision Faders: Uses 45mm faders for tactile, surgical control over frequency adjustments.
- Switchable Ranges: Users can toggle between ±6 dB for fine-tuning or ±15 dB for more aggressive room correction or feedback control.
- Bessel Low-Cut Filter: Features a switchable 40Hz, 18dB/octave low-cut filter to remove unwanted low-end rumble.
- Constant-Q Design: Ensures the filter bandwidth remains consistent regardless of the amount of boost or cut applied.
Technical Specifications
- Connectivity: Includes XLR, 1/4″ TRS (balanced/unbalanced), and barrier strip connectors for flexible installation.
- Dynamic Range: Boasts a high dynamic range of 109 dB to 115 dB with a signal-to-noise ratio up to 97 dB.
- Build: Housed in a robust 3U (19-inch rack-mount) steel and aluminum chassis.
- Bypass & Safety: Includes a power-off hardwire relay bypass with a 2-second power-up delay to prevent “thumps” and ensure signal continuity.
