Specifications
†
Input Impedance
Mic
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
4,000 ohms
Line
. . . . . . . . . . . . . . . . . . . . . . . . . . .
30,000 ohms
Output Impedance
Line
. . . . . . . . . . . . . . . . . . . . . . . . . . .
200 ohms
Mic
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
320 ohms
Maximum Input Level
Mic
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
–20 dBV
Line
. . . . . . . . . . . . . . . . . . . . . . . . . . .
30 dBV
Maximum Output Level*
Line
. . . . . . . . . . . . . . . . . . . . . . . . . . .
+14 dBm (600 ohms)
Mic
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
–40 dBm (600 ohms)
Nominal Output Level (0 VU)*
Line
. . . . . . . . . . . . . . . . . . . . . . . . . . .
+4 dBm (600 ohms), +4.4 dBV (open circuit)
Mic
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
–46 dBm (600 ohms), –44 dBV (open circuit)
Maximum Gain
. . . . . . . . . . . . . . . . . . . .
≥
70 dB
Frequency Response
. . . . . . . . . . . . . . .
60 Hz to 30 kHz at –3 dB points
Dynamic Range
1
. . . . . . . . . . . . . . . . . . .
75 dB ±10 dB, dependent upon gain control settings
Equivalent Input Noise
. . . . . . . . . . . .
–120 dBV (150 ohms) at maximum gain
Input Attenuation
. . . . . . . . . . . . . . . . .
10 dB
Mic/Line Input Pads
. . . . . . . . . . . . . . .
50 dB
Microphone Phantom Power
. . . . . . .
+12V DC
Control Voltage Out
. . . . . . . . . . . . . . .
+4V DC
Power Supply
. . . . . . . . . . . . . . . . . . . . . .
12V AC, 150 mA, min.
Operating Temperature
. . . . . . . . . . .
32° to 104° (0° to 40° C)
Dimensions
. . . . . . . . . . . . . . . . . . . . . . . .
8.25" (210 mm) W x 9.38" (327 mm) D x 1.75"
(44 mm) H (including feet, knobs and connectors)
Weight
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 lbs. 7 oz (1.6 kg)
Included Accessories
. . . . . . . . . . . . . . .
AC power supply, AT8325/1.0 Link Cable
Optional Accessory
. . . . . . . . . . . . . . . .
AT8628 Double Rackmount Joining Plate
†
In the interest of standards development, A.T.U.S. offers full details on its test
methods to other industry professionals on request.
* Master Level control at maximum (fully clockwise).
1
Input terminated with 150 ohms, A-weighted using Audio Precision System One.
Summary of Internal Controls
Function
Ch 1
Ch 2
Ch 3
Ch 4
Output
50 dB Mic /Line Atten.
SW1
SW2
SW3
SW4
SW15
12V Phantom Power
SW5
SW6
SW7
SW8
--
10 dB Input Atten.
SW9
SW10
SW11
SW12
--
“Off” Attenuation
VR5
VR6
VR7
VR8
--
Meter RMS/Peak
--
--
--
--
SW16
See diagram on page 8 for locations/positions.
11
