D.I. Boxes (Direct Injection Boxes) are part of the essential set of tools required for any professional live sound situation or any application where the audio devices feature diff erent levels, impedance and connections. Transforming audio signals from unbalanced to balanced, D.I. Boxes reduce the possibility of electrical disturbances on the line - especially over long cable runs such as from a musical instrument to the FoH mixing console. The DB series includes three different models of high-performance D.I. boxes: a single channel active (DB1A), a single channel passive (DB1P) and a dual channel active (DB2A). The circuitry of each model has been designed with the maximum care, using carefully selected electronic components, such as isolation transformers (DB1A, DB1P) and low-distortion ICs.
nput Section
Input Impedance 200K Ohm (pad at 0 dB)
47k Ohm (pad at -20 dB)
47k Ohm (pad at -40 dB)
Max Input Level +5 dBu (pad at 0 dB)
+25 dBu (pad at -20 dB)
+35 dBu (pad at -30 dB)
Connectors 2 x 1/4" jack + 1 x RCA (unbalanced)
Output Section
Output Active discrete devices (transformer less)
Max. Output Level into 600 Ohms or greater
+5 dBu (for 0.1% THD at 50 Hz)
+5 dBu (for 0.1% THD at 1k Hz)
Connector XLR-M
System Performance
Insertion loss < 1 dB
CMR > 50 dB
Phase distortion +20° at 20 Hz, -30° at 20k Hz
Distortion (THD 20-20k Hz 0dBu) < 0.007 %
Noise < -105 dBu unweighted
Frequency Response 10 Hz to 40 kHz, +0dB/-1 dB
General
Controls On/off, Pad -20, Pad -30, Gnd Lift.
Indicators On
Phantom Power +24 volts DC to +48 volts DC
AC/DC adaptor +9 volts DC
Standalone/Standby 9 volt PP3 type battery
Current consumption less than 8 mA
Dimensions (WxHxD) 215 x 50 x 125 mm
Weight 1.06 kg (2.34 lb)
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