Noise Gate 904

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

Switches:
In/Out, Gate, Key

Indicators:
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

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

In questo link sono elencati 26 modelli, di cui 25 con immagini e 4 con schemi.
Elenco delle radio e altri apparecchi della dbx Inc.; Waltham (MA)