Orban 422A MONO Limiter/DeEsser sn1446660.

Orban Equipment has a very well deserved, Excellent reputation in the most demanding broadcast environments.   They have also found favor in the recording field as engineers have discovered their flexibility, smooth operation and warmth. 

This is a Mono limiter, with separate controls for the every Parameter, including the DeEsser & Gate functions.  It has  Balanced Terminal Input and Outputs, Output level control and Gate access.

This unit is clean, with some light wear on the paint along the top edge of the front panel.  The front panel paint and markings are in VVG condition, with no wear on the Rack ears or mounting holes.

FEATURES

• Production AGC function using circuitry adapted from industry-standard OPTIMOD-FM Model 8100A broadcast signal processor
• De-esser characteristics similar to highly-accepted Orban dedicated de-essers
• Independent compressor/limiter and de-esser control loops with optimized, program-controlled parameters for each
• Ability to increase average loudness of program material or individual tracks without introducing unnatural sound quality or artifacts
• Defeatable gain-freezing gate with user-adjustable threshold to prevent pumping and breathing

SPECIFICATIONS

Input

Impedance: greater than 10 k ohms active balanced
Level: -15dBm produces 10dB gain reduction with ATTACK TIME control
centered, INPUT ATTEN control fully CW, and RATIO control at infinity-to-one.
Absolute Overload Level: +21dBm

Output

Impedance: approximately 100 ohms, electronically balanced to ground
Level: +4dBm nominal; absolute peak overload occurs at +26dBm

Frequency Response

+0.25dB 20-20,000 Hz below limiting and de-esser thresholds

Compressor/Limiter Section

Attack Time: manually adjustable in approximate range of 500us to 200ms; automatically scaled by program content.

Release Time: adjustable in approximate range of O.SdB/sec to 20dB/sec; automatically scaled by program content. Switch-selectable LINEAR and EXPONENTIAL release shapes.

Compression Ratio: adjustable from 2:1 to infinity-to-one at threshold. Lower ratios automatically increase beyond threshold.

Range Of Gain Reduction: 25dB

Tracking Of Multiple Channels; +0.5dB

Total Harmonic Distortion (ATTACK and RELEASE TIME controls centered; infinite RATIO; 15dB gain reduction): less than 0.05% @1kHz. Typically 0.25% @20Hz; 0.02% @100Hz; 0.02% @1kHz; 0.035% @10kHz.
SMPTE IM Distortion (controls set as above; 60/7000Hz 4:1; 15dB gain
reduction): typically 0.03%

De-Esser Section

Attack Time: approximately I ms

Release Time: approximately 30 ms

Harmonic Distortion; less than 0.05% THD introduced by de-essing action @10kHz

Available Gain Reduction; greater than 25dB

System Noise

RMS noise in 20-20kHz bandwidth better than 85dB below output clipping threshold for any degree of gain reduction; 90dB typical.

Crosstalk (424A Only)

Better than -70dB @20kHz. Unmeasureable below 10kHz.

Operating Controls
Compressor/Limiter

INPUT ATTENUATOR

COMPRESSION RATIO

ATTACK TIME

RELEASE TIME

RELEASE SHAPE

GATE THRESHOLD

OUTPUT TRIM

IDLE GAIN

COMPRESSOR/LIMITER OP/DEFEAT

OUTPUT ATTEN (rear panel)

De-Esser

THRESHOLD

DE-ESSER OP/DEFEAT

General

STEREO COUPLING (424A only)

POWER ON/OFF

Indicators
Compressor/Limiter

GAIN REDUCTION METER

GATED LED

VCA LEVEL METER

De-Esser

NORMAL De-essing LED

HEAVY De-essing LED

Power Requirement

115/230 VAC +10%; 50-60Hz. U-ground power cord attached.

Dimensions

19" (48.3cm) wide x 3.5" (8.9cm/2 units) high x 10" (25.4cm) deep

Operating Temperature

0-45 degrees C