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CI-4A

Active direct injection box

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Active direct injection box for connecting an unbalanced high impedance signal (guitars, keyboards, etc.) directly to a balanced input on a mixer with XLR connector. Power supply using a 9V 6LR61 battery or 20 to 48 V phantom supplied by the mixer.
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CHARACTERISTICS 

Active direct injection box.
Converts 1 unbalanced input into 1 balanced XLR output for using with long lengths of cable.
For connecting instruments such as guitars, bass, etc. to the balanced microphone input with XLR connector of a mixer.
Robust construction.

INPUTS 

1 unbalanced line, XLR and 6.3 mm jack, 50,000 Ω, 13 to 33 dBu

OUTPUTS 

1 balanced line XLR, 600 Ω, 1.5 V
1 link, 6.3 mm jack, 50,000 Ω

CONTROLS 

Attenuation selector 0, 20, 40 dB
GND lift earth disconnection

RESPONSE 

10-30,000 Hz ±1 dB

DISTORTION 

Harmonic: <0.02% at 1 KHz 
Background noise: -108 dBu

INDICATORS 

LED power indicator

POWER SUPPLY 

1 x 9V 6LR61 battery or 20 to 48 V phantom power supply

DIMENSIONS 

130 x 45 x 127 mm depth

WEIGHT 

0.6 kg

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