GRAS 12HM 10-Channel Power Module for Lownoise Systems

Connection:
Traditional 200 V
Channel(s): 10

Technology

The 12HM provides:

  • polarization voltage (200 V) for up to 10 condenser microphones
  • voltage supplies (±15 V) for powering up to 10 microphone preamplifiers
  • individual response setting, pressure or free field, for each channel
  • individual gain adjustement of ±3 dB for each channel

When connected to the 40HF/40HH/40HT Low-noise Microphone Systems, each channel of the Type 12HM supports the specifications of a GRAS low-noise measuring system, and can be used in sound-power measurements of low-noise products, such as disk drives, under anechoic or semi-anechoic conditions in accordance with IEC 745:1977.

Warranty

All GRAS products are made of high-quality materials that will ensure life-long stability and robustness. The 12HM 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
.
Output channel(s)
10
Output impedance
Ω
30
Direct coupling input to output
No
Linear mode
No
Type
Traditional power supply (LEMO)
Input channel(s), traditional power supply
10
Channel separation (20 Hz to 20 kHz)
dB
>90
Preamplifier supply
V
+-15
Polarization voltage
V
200
Overload indication
Yes
PC controlable
No
POWER AMPLIFIER
.
External filter option
No
Power amplifier overload detection
No
Power supply, external (±10 %)
Vac
115 to 230
Power consumption
W
35
Battery low indication
No
Fuse 230 V / 115 V
mA
160 / 315
Weight
g / oz
5,500 / 194.01
Specification Conditions

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

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