Precision Audio and AV Interface Products

Radio Design Labs

RU-EQ3 Three Band Audio Equalizer with Knobs - Terminal block

  • 3-Band Audio Equalizer
  • Custom Tailored Audio Bandwidth
  • User-Accessible Adjustments
  • High-Density Rack-Mount Convenience
  • Low-Noise, Low-Distortion Equalizer
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The RU-EQ3 features a balanced bridging input, which may be connected unbalanced if desired. The output driver is 150 Ω balanced, and is intended to drive unbalanced or balanced lines of 150 Ω or higher impedance. Front-panel knobs provide active equalization, each controlling a separate audio band. These bands were carefully selected to yield a module that works effectively in a wide variety of systems. Each band's center frequency can be either boosted or attenuated by at least 12 dB. The Q of the low and high band equalizers was selected so that those controls can be functionally considered as a total bass band or treble band control. The RU-EQ3 adds a third control. This midrange control is optimized to voice band adjustment, with the overlap tailored to provide smooth operation for wideband music applications. The RU-EQ3's OVERLOAD indicator flashes if either the input or output stage clips.

Input:
100 kΩ balanced or unbalanced bridging; line-level
THD+N:
< 0.030%; 0.010% typ. (1 kHz, +4 dBu reference; flat response)
CMRR:
> 60 dB (100 Hz)
Frequency Response:
20 Hz to 22 kHz (EQ set flat; ± 0.5 dB into 600 Ω)
10 Hz to 22 kHz (EQ set flat; ± 0.5 dB into 10 kΩ)
Noise:
< -80 dB (below +4 dBu)
Center Frequencies:
Low Band: 80 Hz
Mid Band: 1 kHz
High Band: 30 kHz
Bandwidth:
Low Band: 20 Hz to 300 Hz
Mid Band: 200 Hz to 7 kHz
High Band: 3 kHz to 30 kHz
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED, 24 Vdc @ 25 mA
Package Type:
Cardboard Box
Package Dimensions:
4.375 x 7 x 2.25 in.
Shipping Weight:
0.8 lbs.
WEEE weight:
0.565 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
Format
High Res Images:
Format
Declaration of Conformity:
Format
PDF

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RACK-UP SERIES

RACK-UPs are the original 1/3 rack width 1RU rack-mountable modules for the A/V, recording and broadcast industries. Module functions include mixing, switching, pre-amplification, power amplification, distribution, gain control, equalization and more. Some RACK-UP modules are constructed in solid encapsulated durable industrial black plastic enclosures; MAX RACK-UPs are assembled using heavy duty extruded aluminum and steel panels. The rear panels feature clear bold white lettering for the terminal blocks and connectors. Reverse-printed front-panel polycarbonate laminates provide an attractive, durable finished appearance for rack-mounted or free-standing use.

Since RDL first originated 1/3 rack width modules, RACK-UPs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple RACK-UP modules may be interconnected, or may be connected with other RDL modules to form all or part of an A/V system. Certain RACK-UP modules are often used free standing; all RACK-UPs may be rack mounted. A complete range of mounting options is available for systems comprised of multiple modules.

RACK-UP modules provide input, output and control connections through terminal blocks and connector (or both) according to common usage in professional installations. Front panels are equipped with connectors, user controls and LED metering, as appropriate.

Functions and features provided by RACK-UPs, since their introduction, are still available today. This continuity in product offering and support makes RACK-UP modules a preferred long-term resource for system design solutions. RACK-UP SERIES modules are designed and manufactured in the U.S.A.

RU-EQ3 RU-EQ3