GRAS 12AD 1-Channel Power Module

Connection:
Traditional 200 V
Channel(s): 1

Technology

Typical applications and use

  • General-purpose measurements
  • Precision measurements
  • Acoustic monitoring
  • Microphone calibration
  • 0 V or 200 V polarization

Design

The 12AD can be powered either by internal standard batteries or an external DC supply (4.5 V- 24 V), e.g. a mains/line adapter. It is built into a sturdy anodized aluminium cabinet.

The polarization voltage for the microphone fitted to the preamplifier can be set to 0 V — for prepolarized microphones, or 200 V — for externally polarized microphones.

The 12AD also supplies ± 15 V to power the preamplifier. It will run for approximately 50 hours on fresh standard alkaline batteries. A Low Batt LED indicates the condition of the batteries.

The input is a 7-pin LEMO socket on the front panel, which is wired up for GRASmicrophone preamplifiers, e.g. 26AB, 26AC,26AJ and 26AK, but is also compatible with other available makes of similar microphone preamplifiers.

The signal from the preamplifier is AC coupled to the output which is a standard BNC socket also on the front panel.

Warranty

All GRAS products are made of high-quality materials that will ensure life-long stability and robustness. The 12AD is delivered with a 2-year warranty. The warranty does not cover products that are damaged due to negligent use.

Service and Repairs

All repairs are made at GRAS International Support Center located in Denmark. Our Support Center is equipped with the newest test equipment and staffed with dedicated and highly skilled engineers. Upon request, we make cost estimates based on fixed repair categories. If a product covered by warranty is sent for service, it is repaired free of charge, unless the damage is the result of negligent use or other violations of the warranty.

Warranty

All GRAS products are made of high-quality materials that will ensure life-long stability and robustness. The 12AG is delivered with a 2-year warranty. The warranty does not cover products that are damaged due to negligent use.

Service and Repairs

All repairs are made at GRAS International Support Center located in Denmark. Our Support Center is equipped with the newest test equipment and staffed with dedicated and highly skilled engineers. Upon request, we make cost estimates based on fixed repair categories. If a product covered by warranty is sent for service, it is repaired free of charge, unless the damage is the result of negligent use or other violations of the warranty.

Specifications

CONDITIONING
.
Frequency response (±0.2 dB)
Hz
0.05 to 200 k
Output channel(s)
1
Output impedance
Ω
30
Direct coupling input to output
No
Linear mode
Yes
Type
Traditional power supply (LEMO)
Input channel(s), traditional power supply
1
Preamplifier supply
V
+-15
Polarization voltage
V
0 / 200
Overload indication
No
PC controlable
No
External filter option
No
Power amplifier overload detection
No
POWER SUPPLY
.
Power supply, battery
4 x LR6 (AA)
Power supply, external
Vdc
4.5 to 24
Power consumption
mA
35
Battery life
h
50
Battery low indication
Yes
Fuse
mA
160 (slow)
Weight
g / oz
520 / 18.342
Specification Conditions

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

Ordering info

Extension cables with 7-pin LEMO connectors

GRAS AA0008 3 m
GRAS AA0009 10 m
GRAS AA0012 30 m
GRAS AA0014 100 m
GRAS AA0020-XX Custom, XX specifies the length in metres

 

Extension cables with BNC connectors

GRAS AA0034 2 m
GRAS AA0035 3 m
GRAS AA0036 5 m
GRAS AA0037 10 m
GRAS AA0038 30 m
GRAS AA0039-XX Custom, XX specifies the length in metres

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

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