Sound Barrier SB2231XL — Dual Channel 31-Band Equalizer and Limiter
SB2231XL Overview
The Sound Barrier SB2231XL is a dual-channel graphic equalizer and limiter built for professional sound reinforcement applications where precision, reliability, and operational flexibility are non-negotiable. Each channel delivers 31-band 1/3-octave equalization with a switchable boost/cut range of ±6 dB or ±12 dB, giving engineers the ability to tailor EQ resolution to the demands of the system. An extended 10Hz to 50kHz frequency response ensures full-spectrum accuracy across the signal chain. The SB2231XL is well suited for live sound engineers, system integrators, touring companies, and installed venue applications.
The unit features an intuitive front-panel layout with long faders and output level metering, supporting fast, confident adjustments in high-pressure live environments. An internal power supply with 115/230V selectable operation and a power-off hard-wire relay bypass with 2-second power-up delay add practical reliability for permanent and touring installations alike.
Key Features
- Dual 31-Band 1/3-Octave EQ — Two independent channels of full-range graphic equalization for stereo or dual-mono system processing
- Switchable Boost/Cut Range — Selectable ±6 dB or ±12 dB per channel to match the precision requirements of the application
- ±12 dB Input Gain — Onboard input gain adjustment for level matching across diverse signal sources
- Extended Frequency Response — 10Hz to 50kHz response for full-spectrum signal integrity
- 18 dB/Octave 40Hz Bessel Low-Cut Filter — Steep, phase-optimized high-pass filtering to eliminate sub-sonic content and protect low-frequency transducers
- Power-Off Hard-Wire Relay Bypass — Automatic signal bypass with a 2-second power-up delay protects downstream systems during power cycling
- Chassis/Signal Ground Lift — Onboard ground lift capability for eliminating ground loop interference in complex signal chains
- Internal Universal Power Supply — Selectable 115/230V, 50-60Hz operation for domestic and international deployment
Connectivity & I/O
- Balanced XLR inputs and outputs per channel
- 1/4″ TRS inputs and outputs per channel
- Barrier strip connections for permanent installation wiring
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