DBX dB12 Active Direct Box, Transformer Isolated, 20Hz to 20kHz (+/-3dB) / 30Hz to 20kHz (+0/-1dB) Frequency Response

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About the DBX dB12

The dbx BD12 is a high performance, active direct box housed in an industrial strength enclosure and includes custom dbx mu-metal-shielded audio transformers, high-quality Neutrik connectors and low-noise circuitry. The box includes a pad switch to accommodate instrument, line and even speaker level signals. A polarity invert switch can alter the phase relationship between the direct and mic'd sound, while a ground lift switch helps to tame any ground hum or buzz.

While providing a clean signal free from interference, the solid, stable footprint of the enclosure prevents the box from being dragged around the stage and the unique contoured underside allows secure stacking of multiple units.

DBX dB12 Features

  • Premium performance direct box housed within a rugged design
  • Low-noise active circuitry
  • Stackable chassis with durable rubber foot
  • Gold-plated Neutrik XLR connector
  • Premium chrome toggle switches
  • Hi-Z 1/4" input jack
  • Parallel 1/4" thru jack
  • Transformer isolated
  • Premium shielded custom dbx transformer
  • Balanced XLR Lo-Z output
  • Three-way 0,20,40dB pad switch
  • Swithcable high-cut filter
  • Output polarity invert switch
  • Ground lift switch
  • Phantom powered with green LED phantom power indicator
  • 20V to 48V operation

DBX dB12 Specifications

Circuit Type Active
Input: Number of Connectors 1
Input: Connection 1/4" TS (Tip Hot, Sleeve Ground)
Input: Type Unbalanced, RF Filtered
Input: Attenuation Pad Switchable: 0, 20, 40 dB
Input: Filter Switchable: Low Pass @ 6 kHz (40 dB pad position only)
Input: Max Input Level 0 dB Pad: +10 dBu typical @ 1 kHz with <1% THD
20 dB Pad: +30 dBu typical @ 1 kHz with <1% THD
40 dB Pad): +33 dBu
Input: Input Impedance 0dB: 1 MOhms
-20dB: 65 kOhms
-40dB: 70 kOhms
Output: Number of Connectors 2
Main Output Male XLR, Balanced, Pin 2 hot
THRU Output 1/4" Unbalanced TS (Tip Hot, Sleeve Ground)
Main Output Impedance 600 Ohms typical, balanced
Main Output CMRR 106 dB typical @ 60 Hz
123 dB typical @ 1 kHz
108 dB typical @ 10 kHz
Output Polarity Switchable: Normal / Invert
Performance: Bandwidth 20 Hz to 20 kHz +0/-2 dB typical with 600 Ohms load
20 Hz to 20 kHz +0/-1 dB typical with 2 kOhms or higher load
Performance: Frequency Response 16 Hz to 30 kHz, -3 dB, with 600 Ohms Load
10 Hz to 70 kHz, -3 dB, with 2 kOhms or higher load
Performance: Phase Deviation (I/O) +40 deg @ 20 Hz, -20 deg @ 20 kHz into 2 kOhms load
Performance: Insertion Loss 1 dB typical
Performance: Harmonic Distortion (THD+N) 0.03% typical @ 50 Hz, 0 dBu
0.003% typical @ 1 kHz, 0 dBu
0.005%typical @ 10 kHz, 0 dBu
Performance: Noise Floor -112 dBu, 22 Hz to 22 kHz, unweighted
Performance: Dynamic Range 122 dB, 22 Hz to 22 kHz, unweighted
Voltage +48 V Phantom Power
Current < 8 mA
Ground Switchable: Ground / Lift
Construction Metal Casting
Dimensions (L x W x H) 5.82" x 5.44" x 2.20" / 14.78 x 13.82 x 5.59 cm
Weight 1.5 lbs. (0.68 kg)
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