OCL-2 Specifications

   
Circuit Type: Optical input attenuator and class A vacuum tube gain stage with transformerless output

Input Sensitivity: +4dBu
Input Impedance:  10Kohm
Freq. Response:  -1.0dB 8Hz and 145kHz with 10Kohm output load
Noise: less than -78dB below +4dBu output level with Output control at 0dB
less than -75dB below +4dBu output level with Output control at +20dB
Distortion: less than 0.05% THD+N, 20Hz to 10kHz, measured with +4 dBu input, +10dBu output, 600 ohm load
Output: +35dBu into 10Kohm load, +24dBu into 600 ohm load

Max. Gain Reduction: 27dB
Threshold: off to -20dB
Ratio: 1.5:1 to 15:1
Output: off to +20dB
Modes: fast (peak-averaged), preset or manual operation
Presets:  0.1s, 0.3s, 1s, 2s, 1 to 4s and 0.5 to 20s (program dependent)
Manual: attack time variable from 1.0ms to 40ms, release time variable from 0.1s to 2s
Meter: selection of input level, gain reduction, or output level, referenced to +4dBu = 0VU
In/Bypass: hard bypass of input signal to output connector
Link/Split: links channel 1 and channel 2 for stereo operation
Polarity: input and output XLR connectors are pin 2 hot

Vacuum Tubes: (2) 6072A, (2) 6922
Power: 120Vac, 30W (240Vac optional)
Power Supplies: +300Vdc, +12.6Vdc and ±15Vdc, fully regulated with soft-start warm-up and output muting
Dimensions: 2U enclosure, 19" x 3.5" x 12.5" (48.2 x 8.8 x 31.8 cm)
Weight: 14lbs (6.4kg)

Notes: 0 dBu = 0.775 Vrms.
All noise measurements are unweighted, 20 - 20,000 Hz bandwidth.
All specifications are subject to change without notice.