RU-EQ3

RDL RU-EQ3 - 3-Band Audio Equalizer with Knobs and Terminal Block I/O

The RDL RU-EQ3 is a compact 3-band audio equalizer designed for precise tonal shaping in professional AV systems. It features front-panel knobs for independent adjustment of low, mid, and high frequency bands. Each band can be boosted or attenuated by at least ±12 dB, allowing quick and intuitive sound tailoring for both voice and music applications.

The RU-EQ3 includes a high-impedance balanced input (also usable unbalanced) and a 150Ω balanced output suitable for driving balanced or unbalanced lines. An overload indicator alerts the user to clipping at either the input or output stage. With low noise, low distortion, and optimized frequency bands, the RU-EQ3 is ideal for rack-mounted or flat-pack installations.

Functionality

• 3-band EQ - low, mid, and high frequency control
• Front-panel knobs - fast and precise adjustment
• Boost or cut each band by at least ±12 dB
• Frequency bands optimized for voice and music
• Overload indicator - input/output clipping detection
• Balanced or unbalanced operation
• Rack-mountable or FLAT-PAK™ compatible

Features

• Channels: 1
• Input: 100kΩ balanced or unbalanced (bridging), line-level
• Output: 150Ω balanced (drives ≥150Ω lines)
• Frequency response (EQ flat):
  - 20Hz-22kHz (±0.5dB into 600Ω)
  - 10Hz-22kHz (±0.5dB into 10kΩ)
• THD+N: < 0.030% (typ. 0.010% @ 1kHz, +4dBu)
• Noise: < -80dB (below +4dBu)
• CMRR: > 60dB @ 100Hz
• Center frequencies:
  - Low: 80Hz (bandwidth 20Hz-300Hz)
  - Mid: 1kHz (bandwidth 200Hz-7kHz)
  - High: 30kHz (bandwidth 3kHz-30kHz)
• Power: 24V DC, 25mA
• Operating temperature: 0°C - 55°C

RDL RU-EQ3 is the perfect tool for AV professionals needing fast and effective tonal control in fixed installations.