Audio430 DOLBY Noise suppressor stereo + remote control
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The Dolby 430 Series is a background noise suppressor system for reducing the broadband noises such as wind or traffic rumble that often mar location recordings. Many mixers in film and television postproduction already rely on Dolby Laboratories’Cat. No. 43, a background noise suppression unit based on a modified version of Dolby A-type noise reduction. The 430 Series takes this concept further by using a modified version of Dolby SR’s patented combination of fixed and sliding bands to give more stable signal handling and a significantly reduced chance of audible side effects.
While superior in performance to the Cat. No. 43, the 430 Series uses fewer controls. Low- and high-frequency faders adjust the amount of noise suppression above and
below dominant mid-frequency signals such as dialogue. A pull-to-engage control permits varying the preset operating level for recordings at unusually high or low levels (overall
gain of the unit remains fixed).
The 430 Series is a modular system providing from one to six channels of background
noise suppression. A single control unit provides power and control signals for up to three single-rack space frames, each with one or two channels of processing. All operating controlsare mounted in a remote control module which may be located up to 15 meters (50
feet) from the control unit. These remote controls have been specifically designed for easy
console mounting. Alternatively, a housing is available to allow for standalone operation
While superior in performance to the Cat. No. 43, the 430 Series uses fewer controls. Low- and high-frequency faders adjust the amount of noise suppression above and
below dominant mid-frequency signals such as dialogue. A pull-to-engage control permits varying the preset operating level for recordings at unusually high or low levels (overall
gain of the unit remains fixed).
The 430 Series is a modular system providing from one to six channels of background
noise suppression. A single control unit provides power and control signals for up to three single-rack space frames, each with one or two channels of processing. All operating controlsare mounted in a remote control module which may be located up to 15 meters (50
feet) from the control unit. These remote controls have been specifically designed for easy
console mounting. Alternatively, a housing is available to allow for standalone operation
Signal Processing
Independent low- and high-frequency stages withmaximum noise suppression of approximately16 and 18 dB, respectively
Signal Connection3-pin XLR connectors for audio; 34-way ribbonconnector links processing module frames to powersupply/control unit; one 15-way D-connector con-nects remote controls for all channels
Operating Controls
Operating controls for each channel of processingare mounted on Cat. No. 429
Remote Controlmodule Level: rotary control varies signal level in processingcircuitry over a ±6 dB range without changingoverall gain of unitIn/out: push-button with LED indicator switchesprocessing in and out of circuit HF & LF: fader controls set attenuation ofunwanted low-level signals
Signal Levels
Nominal input and output level +4 dBr1
Input Circuits
Electronically balanced, 20 kΩinput impedance,substantially resistive; common mode rejectionbetter than 55 dB, 50 Hz to 10 kHz; maximuminput level +27 dBr balanced, +21 dBr unbalanced
Output Circuits
Electronically balanced, approximately 20Ωoutput impedance; output balance better than 1 dBinto a symmetrical 600Ωload; output float2better than –40 dB, 50 Hz to 1 kHz; maximumsignal level into 600Ωor greater: +26 dBr balanced,+20 dBr unbalanced; either leg of the output can begrounded for unbalanced operation with no changein level
Frequency Response±1 dB 20 Hz to 20 kHz with LF and HF controlsset to 0
Crosstalk
Channel to channel within a single frame: better than–94 dB 20 Hz to 20 kHz
Power Line Input
User-selected voltage ranges (50–60 Hz, single-phase); nominally 100 V (85–110 V), 110 V(102–132 V), 220 V (187–242 V),240 V (204–264 V)
Size
Processor and power supply/control units: 44 ×483mm (standard 1.75 ×19 inches rack mounting );maximum projection behind mounting surface:330 mm (13 inches) including connectors; remotecontrol panels: 150 mm x 39.5 mm (5.91 ×1.56inches ); maximum projection behind controlsurface: 100 mm (3.94 inches) including connec-tors; may be console-mounted, mounting holes on142.9 mm (5.63 inches) centers.
Weight
Model Weights (including remotes): 430-S1, 8 kg(17.5 lb); 430-S2, 9 kg (19.6 lb); 430-S3, 12.9 kg(28.3 lb); 430-S4, 14 kg (30.6 lb); 430-S5,17.8 kg (39.2 lb); 430-S6, 18.8 kg (41.4 lb)
Independent low- and high-frequency stages withmaximum noise suppression of approximately16 and 18 dB, respectively
Signal Connection3-pin XLR connectors for audio; 34-way ribbonconnector links processing module frames to powersupply/control unit; one 15-way D-connector con-nects remote controls for all channels
Operating Controls
Operating controls for each channel of processingare mounted on Cat. No. 429
Remote Controlmodule Level: rotary control varies signal level in processingcircuitry over a ±6 dB range without changingoverall gain of unitIn/out: push-button with LED indicator switchesprocessing in and out of circuit HF & LF: fader controls set attenuation ofunwanted low-level signals
Signal Levels
Nominal input and output level +4 dBr1
Input Circuits
Electronically balanced, 20 kΩinput impedance,substantially resistive; common mode rejectionbetter than 55 dB, 50 Hz to 10 kHz; maximuminput level +27 dBr balanced, +21 dBr unbalanced
Output Circuits
Electronically balanced, approximately 20Ωoutput impedance; output balance better than 1 dBinto a symmetrical 600Ωload; output float2better than –40 dB, 50 Hz to 1 kHz; maximumsignal level into 600Ωor greater: +26 dBr balanced,+20 dBr unbalanced; either leg of the output can begrounded for unbalanced operation with no changein level
Frequency Response±1 dB 20 Hz to 20 kHz with LF and HF controlsset to 0
Crosstalk
Channel to channel within a single frame: better than–94 dB 20 Hz to 20 kHz
Power Line Input
User-selected voltage ranges (50–60 Hz, single-phase); nominally 100 V (85–110 V), 110 V(102–132 V), 220 V (187–242 V),240 V (204–264 V)
Size
Processor and power supply/control units: 44 ×483mm (standard 1.75 ×19 inches rack mounting );maximum projection behind mounting surface:330 mm (13 inches) including connectors; remotecontrol panels: 150 mm x 39.5 mm (5.91 ×1.56inches ); maximum projection behind controlsurface: 100 mm (3.94 inches) including connec-tors; may be console-mounted, mounting holes on142.9 mm (5.63 inches) centers.
Weight
Model Weights (including remotes): 430-S1, 8 kg(17.5 lb); 430-S2, 9 kg (19.6 lb); 430-S3, 12.9 kg(28.3 lb); 430-S4, 14 kg (30.6 lb); 430-S5,17.8 kg (39.2 lb); 430-S6, 18.8 kg (41.4 lb)