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Noise Gate 904

Noise Gate 904; dbx Inc.; Waltham MA (ID = 2218348) Misc Noise Gate 904; dbx Inc.; Waltham MA (ID = 2218349) Misc
Noise Gate 904; dbx Inc.; Waltham MA (ID = 2218350) Misc Noise Gate 904; dbx Inc.; Waltham MA (ID = 2218351) Misc
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Noise Gate 904; dbx Inc.; Waltham MA (ID = 2218348) Misc
dbx Inc.; Waltham MA: Noise Gate 904 [Misc] ID = 2218348 820x2100
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For model Noise Gate 904, dbx Inc.; Waltham (MA)
Country:  United States of America (USA)
Manufacturer / Brand:  dbx Inc.; Waltham (MA)
Year: 1990 ?? Category: Miscellaneous (Other, Various) - see notes
Main principle Audio-Amplification; Hi-Fi-High End products
Wave bands - without
Power type and voltage Powered by external power supply or a main unit.
Loudspeaker - - No sound reproduction output.
Power out
from Model: Noise Gate 904 - dbx Inc.; Waltham MA
Material Various materials
Shape Rack
Dimensions (WHD) 38 x 133 x 262 mm / 1.5 x 5.2 x 10.3 inch

Input Impedance: Balanced = 25K Ohms
Unbalanced = 18.5K Ohms
Output Impedance: 22 Ohms, designed to
drive 600 Ohms or greater
Maximum Input Level: +24 dBm
Maximum Output Level: +24 dBm into 600 Ohms or greater
Frequency Response: 20Hz -20kHz (+0, -1 dB)
Distortion: THD at 1kHz <.02%
Equivalent Input Noise: -82 dBm, 20Hz - 20kHz Bandwidth, unweighted
Attack Rate: Variable 500 dB/ms to 2.5 dB/ms
Release Rate: Variable 2.5 dB/ms to 22 dB/sec
Threshold: Variable -40 to +10 dB (7.75 mV to 2.5 V)
Expansion Ratio: Variable 1.5:1-5:1
Maximum Attenuation: >60 dB

Key Input Impedance:
Balanced = 250K Ohm
Unbalanced = 185K Ohm

Controls: Attenuation
Limit, Ratio, Threshold, Attack, Release

In/Out, Gate, Key

In/Out, Gate, Key

Metering: LED
Column -2,4,6,8,10,15. 20,30,40,60 dB gain reduction
Power Supply
Requirements: ±15V
Regulated at 60ma, ± 24V Unregulated at 30ma

1.Over Easy® expansion
2. External "Key" input
3. Gate Mode
4. Control Voltage output (50mV/dB)

Net weight (2.2 lb = 1 kg) 0.3 kg / 0 lb 10.6 oz (0.661 lb)

Model page created by Bartosz Szwed. See "Data change" for further contributors.

All listed radios etc. from dbx Inc.; Waltham (MA)
Here you find 23 models, 19 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.