CLIO PRE01 Operating Manual

ELECTRICAL & ACOUSTICAL TESTS
MICROPHONE
PREAMPLIFIER
OPERATING MANUAL

PRODUCT DESCRIPTION

The microphone preamplifier PRE-01 has been designed to match Audiomatica's microphones
MIC-01, MIC-02 and MIC-03. It is particularly useful when the microphone has to be operated far
from the analyzer or when weighted measurements are needed. PRE-01 powers the microphone
connected to its input with an 8.2V phantom supply and adds a selectable weighting filter (A or B
or C); also available there is a 20 dB gain stage. The unit is operated with one standard 9V battery
or with an external DC power supply.

TECHNICAL SPECIFICATIONS

FREQUENCY RESPONSE:
WEIGHTING FILTERS:
PHANTOM POWER SUPPLY:
GAIN : 0 & 20dB (INTERNAL SETTINGS)
INPUT IMPEDANCE:
OUTPUT IMPEDANCE:
MAXIMUM OUTPUT VOLTAGE (@1kHz):

USE OF THE PREAMPLIFIER

The MIC-01, MIC-02 or MIC-03 microphone cable has to be connected to the preamplifier input
while the preamplifier output has to be connected to the analyzer input. The unit is switched on
with the POWER switch, while the TEST push-button controls the state of the unit; when pressing
it, if the led light is on then the unit operates correctly, otherwise not: either the battery is low or
the external power supply is not connected. The FILTER switch inserts the weigthing filter. To
choose the desired weighting filter type and to set the amplifier gain you have to modify the
Preamplifier Settings as described later.
NOTE: if the 20 dB gain stage is inserted the overall sensitivity (microphone + pre) is 10
times higher. For example if your microphone has a sensitivity of 17.1 mV/Pa and you
preamplify it of 20 dB then you get a sensitivity of 171 mV/Pa.
÷
7Hz 110kHz (-3dB)
A, B, C (IEC 651 - TYPE I)
8.2V (5600 Ohm)
5600 Ohm
100 Ohm
25 Vpp
INPUT OUTPUT
THD (@1kHz):
INPUT NOISE (@20dB gain):
DRIVE CAPABILITY:
BATTERY DURATION:
SIZE:
WEIGHT:
ON
OFF
FILTER
PRE-01 front panel.
>12h (alkaline cell)
AUDIOMATICA
ON
OFF
TEST POWER
0.01%
7uV LIN, 5.3uV A
±
7mA
12.5x19x5cm
900g