Specifications

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 or 15-18V DC, either polarity; 300 mA
Operating Temperature
. . . . . . . . . . . . . 32
°
to 104
°
(0
°
to 40
°
C)
Dimensions
. . . . . . . . . . . . . . . . . . . . . . . . 8.25" (210 mm) W x 9.38" (238 mm) D x 1.75"
(44 mm) H (including feet, knobs and connectors)
Weight
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 lbs. (1.4 kg)
Included Accessories
. . . . . . . . . . . . . . . AC adapter, 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).
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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. S101 S102 S103 S104 S501
12V Phantom Power S102 S202 S302 S402 --
10 dB Input Atten. S301 S302 S303 S403 --
“Off” Attenuation VR102 VR202 VR302 VR402 --
Meter RMS/Peak -- -- -- -- S602
See diagram on page 8 for locations/positions.
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