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Product Description

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Model: dbx 231 (2-Series, including 231SUB variant; same product line as 231XL)

Accessories: Original packaging box, English user manual and factory power cord. All items shown in the pictures are included.

Condition: Actual item as photographed. Sliders move smoothly without sticking; all panel functions work perfectly.

Application Scenarios: Professional live performances, bars, KTVs, conference halls, recording studios and more.

Core Selling Points

Dual-Channel Independent 31-Band Precision Equalization

Each channel features 31-band 1/3 octave constant-Q sliders, covering the full frequency range from 20Hz to 20kHz. Switchable gain of ±6dB / ±12dB. It realizes howling suppression, sound field optimization and timbre shaping all in one unit.

Professional Circuit Design & Pure Sound Quality

4-segment LED level meters for real-time monitoring to prevent signal overload.
40Hz high-pass filter with 12dB/octave slope to eliminate low-frequency noise and resonance.
Balanced & unbalanced dual ports (XLR + 1/4" TRS), compatible with all types of professional audio devices.
Built-in toroidal transformer delivers stable power supply and strong anti-interference performance.

Rack-Mount Design for Easy Installation

Standard 1U / 19-inch rack size, fits seamlessly into stage and engineering racks while saving installation space.

Genuine Original Unit with Complete Accessories

Comes with original box, user manual and power cord. See pictures for physical condition. Ready to use right out of the box with no extra setup required.

Specifications

Item	Parameter
Type	Dual-Channel 31-Band 1/3 Octave Graphic Equalizer
Frequency Response	10Hz – 50kHz (±0.5dB / -3dB)
Dynamic Range	≥ 108dB
Signal-to-Noise Ratio	90dB
Total Harmonic Distortion	＜ 0.004%
I/O Connectors	XLR + 1/4" TRS (Balanced / Unbalanced)
Input Impedance	Balanced: 40kΩ / Unbalanced: 20kΩ
Output Impedance	Balanced: 100Ω / Unbalanced: 50Ω
Dimensions	483×44×191mm (Standard 1U Rack Unit)

Application Scenarios

Live Events: Bands, bars and Livehouses. Effectively suppress acoustic feedback and optimize sound fields.
Fixed Installation: Conference rooms, auditoriums, stadiums and public address systems for shopping malls.
Audio Recording & Production: Adjust vocals and instrument tones, and conduct basic mastering shaping.

Additional Notes

This unit belongs to dbx classic 2-Series. The 231, 231SUB and 231XL are graphic equalizers from the same product line with identical core functions and sound performance. As a well-received model in the professional audio industry, it features solid build quality and outstanding durability, widely recognized by live sound and engineering practitioners.

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