Phantom Power Box Specification
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Conford Electronics
 Professional Audio and Process Control
Headphone Amplifier Box
Description
Specification
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Stereo Headphone Amplifier Box
Description
Specification
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Phantom Power Box Specification
When terminated with 1-2 kOhm microphone amplifier input impedance
Frequency Response
+/- 0.25 dB from 20 Hz to 20 kHz
Noise
Less than -140 dBu from 10 Hz to 20 kHz (Note 1)
Less than -100 dBu from 10 kHz to 1MHz
Distortion
Less than 0.005% from 20 Hz to 20 kHz
Gain
0 dB; -20 dB (+/- 0.5 dB)
Input Clipping Level
-4 dBu; +16 dBu
Input Impedance
2 kOhms (For 100 - 600 Ohm microphones)
DC Power Feed Matching
Better than 0.2%
Output Impedance
Less than 600 Ohms
Output Differential DC Offset
Less than 2 mVolts
Output Differential Line Balance
Better than 0.05%
Max Phantom Power Current
10 mA (Short circuit protected)
Phantom Power Voltage
48 Volts +/- 0.5 Volts
Connectors
Input
XLR 3 pin female
Output
XLR 3 pin male
Pin Connections
PIN 1 GROUND; PIN 2 SIGNAL; PIN 3 RETURN
See product description for unbalanced connections
PP3 Alkaline Battery Life
200 hours at 1 mA phantom power current
External DC Connector
2.5 mm Centre pin positive (Note 2)
Dimensions
Width 80mm; Height 45mm; Depth 135mm
Weight
300 gm including battery
Notes to specification
1.
Measurements of dBu are dB with respect to 0.775 Volts
2.
The unit may be operated from an external supply between 6 and 12 volts DC (maximum) at 50 mA peak. The recommended voltage is 9 volts. The supply for each unit should be fully floating and regulated
3.
A fitted belt clip is available to special order
Operating Controls
Front Panel
Gain Selection
Two position slide switch
Connectors
Microphone input and output
Rear Panel
Battery Holder
PP3 externally accessible
Power on/off
Two position slide switch
Low Battery warning
Red LED
Connector
External DC supply
On switch on the LED should illuminate for about half a second and go out. The LED lights longer the more discharged the battery until it remains on continuously, indicating the battery is no longer serviceable and should be changed. This is also true if the LED illuminates during use. If the LED fails to illuminate at all then the battery is completely discharged.

««Description««
Conford, Liphook, Hampshire, GU30 7QW, UK
+44 (0)1428 751469
contact@confordelec.co.uk  www.confordelec.co.uk/
Webmaster: John
9 - Phantom Power Box Description
Phantom Power Front
RearPanel