The new OCL-500 has the same compression circuit as the OCl-2, but uses a transformerless class A solid-state gain makeup circuit in place of the tube stage. The result is clean, transparent compression that can be used to shape the dynamics of any source while preserving its tone. Like the OCL-2, the OCL-500 has a wide variety of time constants and dynamic control to optimize the compres- sion characteristics, including a sidechain hi-pass filter.
OCL-2 compression profile with proprietary Pendulum opto cell
Six time constants with fast, rms, multi-slope, and average settings
Class A solid-state (no tubes)
Sidechain hi-pass filter
Single-space 500 series rack format
Format: API® 500 series standard, fully compatible
Input Impedance: 20KΩ, balanced
Output Impedance: less than 50Ω
Max. Output Level: +27dBu, balanced
Threshold: off to 20dB of gain reduction at +4dBu
Ratio: 1.5:1 to 15: 1, soft knee
Output: Off to +20dB of makeup gain
Max. Gain Reduction: 27 dB
Frequency Response: +/- 1 dB from 10Hz to 95kHz
Noise Level: better than 78dB below +4dBu, 0-30kHz
Total Harmonic Distortion: less than 0.01% with no compression
Position Type Description
F Fast Peak-averaged by the opto-cell
A Average RMS response
V1 Vintage 1 Three-stage multi-slope (auto)
V2 Vintage 2 Slower three-stage multi-slope (auto)
M1 Manual 1 Medium attack, medium release
M2 Manual 2 Slower attack, slower release
• Average and Vintage 1 are the presets in the Quartet.
• Vintage 2 is the Vintage preset in the Quartet II.
• M1 and M2 are manual attack and release settings often used in the OCL-2.