Precision Audio and AV Interface Products

Radio Design Labs

ST-EQ3 3 Band Equalizer - Line Level

  • 3-Band Audio Equalization
  • Custom Tailored Audio Bandwidth
  • Adjust To Pass Voice-Band Audio
  • Adjust To Produce Smile-Curve for Music
  • Low Noise and Low Distortion Equalization
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The ST-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. Equalization is accomplished by three active circuits, each controlling a separate audio band. These bands were carefully selected to yield a module that works effectively in a wide variety of systems. Setup of the ST-EQ3 is assisted by a peak overload LED which indicates excessive pre or post EQ levels.

Applications

Input:
100 kΩ balanced or unbalanced bridging; line-level
Gain:
OFF to unity (adjustable, ± EQ adjustment)
Audio Output:
+4 dBu nominal, 150 Ω balanced
THD+N:
< 0.030%; 0.010% typical (1 kHz flat response)
CMRR:
> 60 dB (50 to 120 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 bridging load
Noise:
< -80 dB (below +4 dBu)
Center Frequencies:
LOW Band: 80 Hz
MID Band: 1 kHz
HIGH Band: 30 kHz
Bandwidth at 3dB EQ:
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
Dimensions:
Height: 0.7 in. (1.7 cm), Width: 3 in. (7.6 cm), Depth: 1.6 in. (3.9 cm)
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.17 lbs.
WEEE weight:
0.12 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
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High Res Images:
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Declaration of Conformity:
Format
PDF
A&E Specifications:
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STICK-ON SERIES

STICK-ONs are the original application-specific modules for the A/V, recording and broadcast industries. Module functions include signal detection, switching, pre-amplification, format conversion, line driving, power amplification, mixing, distribution, gain control, equalization, routing and more. Each STICK-ON is an ultra-compact module engineered to provide higher performance and longer life than other industry products. STICK-ON modules are solid encapsulated hybrid circuits in durable industrial black plastic enclosures (1.55", 3.94 cm x 3", 7.62 cm x 0.65", 1.65 cm) with clear bold white lettering for the terminal block connections, recessed trimming controls and switches.

Since RDL first originated application-specific modules, STICK-ONs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple STICK-ON modules can be interconnected to form all or part of an A/V system. A single STICK-ON module may be mounted right where its function is needed, often to add an input, output, or gain adjustment to existing equipment. STICK-ON modules allow customizing an A/V system to precisely match users’ needs. Adding STICK-ONs to an existing system can extend system life by adding updated features, resulting in considerable cost savings. A complete range of backboard and rack mounting options is available for systems comprised of multiple STICK-ON modules.

The technology used in STICK-ON modules has been regularly updated over the years to insure industry-leading performance. Functions and features provided by STICK-ONs, since their introduction, are still available today. This continuity in product offering and support makes STICK-ON modules the preferred long-term resource for system design solutions. STICK-ON SERIES modules are designed and manufactured in the U.S.A.

ST-EQ3 ST-EQ3