Precision Audio and AV Interface Products

Radio Design Labs

ST-CL2 Compressor/Limiter - Line Level

  • Positive Audio Level Protection
  • Smooth Inaudible Gain Reduction
  • Tight Audio Peak Control
  • Very Low Noise Compressor
  • Multi Stage Incremental Gain Reduction
  • Fully Automatic Operation
  • Superb Performance with Minimal Setup
  • RDL® SupplyFlex™ Power Input Configuration
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The ST-CL2 is a high performance compressor/limiter designed to maintain a constant average output level and effective peak control over a wide range of input levels. The input and output are line level and each may be wired balanced or unbalanced. Trimmers provide adjustment for all usual professional and consumer audio input and output levels. Internal detectors feed three timing circuits. The threshold level and slope of each timing circuit are incremented to respond sequentially to signals of varying amplitude and energy levels. The ST-CL2 features a soft-knee compression threshold and compression ratio which automatically adjust to the program material. Two LED indicators cover the incremental ranges of compression, making setting of the input level quick and easy. Two ST-CL2s may be strapped together for stereo operation by connecting the coupling terminals between the two modules.

Applications

Input:
10 kΩ Balanced (may be connected unbalanced)
Input Signal Range:
-10 to +4 dBu, adjustable (for 6 dB gain reduction); +22 dBu maximum
Output:
150 Ω Balanced (may be connected unbalanced)
Output Signal Range:
OFF to +8 dBu, adjustable
Frequency Response:
10 Hz to 20 kHz (± 0.2 dB) over full compression range
Noise below +4 dBu output:
< -78 dB (unweighted; +4 dBu input/output)
Total Harmonic Distortion:
< 0.05% @ 1 kHz below compression threshold;
< 0.1% @ 1 kHz with 3 dB gain reduction;
< 0.15% @ 1 kHz with 6 dB gain reduction
CMRR:
> 60 dB (50 to 120 Hz)
Attack Time:
Averaging Compressor: 500 ms (+4 dBu input);
Fast Compression: <10 ms (+20 dBu input);
Peak Limiting: Instantaneous
Release Time:
Automatically adjusting up to 500 ms
Compression Ratio:
Automatically adjusting 1.5:1 to 10: 1
Peak Limiter:
INF:1
Interconnection:
Stereo COUPLE interconnection provided
Indicators (2):
Yellow LED for NORMAL Compression,
Red LED for HEAVY Compression
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
24 Vdc @ 50 mA, SupplyFlex
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.2 lbs.
WEEE weight:
0.145 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
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High Res Images:
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Press Release:
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Declaration of Conformity:
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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-CL2 ST-CL2