DBX dB10 Passive Direct Box, Transformer Isolated, 20Hz to 20kHz (+/-2.5dB) Frequency Response


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About DBX dB10

The dbx BD10 is a high performance, passive 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 dB10 Features

  • Premium performance direct box housed within a rugged design
  • Low-noise passive 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

DBX dB10 Specifications

Circuit Type
Input: Number of Connectors
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
+33 dBu (0 dB Pad / 20 dB Pad / 40 dB Pad)
Input: Input Impedance
80 kOhms with 600 Ohms load, 270 kOhms with 2 kOhms load, 13 MOhms with 100 kOhms load (0dB)
65 kOhms Typical (-20dB)
70 kOhms Typical (-40dB)
Output: Number of Connectors
Main Output
Male XLR, Balanced, Pin 2 hot
THRU Output
1/4" Unbalanced TS (Tip Hot, Sleeve GND)
Main Output Impedance
600 Ohms typical, balanced
Main Output CMRR
128 dB typical @ 60 Hz
104 dB typical @ 1 kHz
98 dB typical @ 10 kHz
Output Polarity
Switchable: Normal / Invert
Performance: Bandwidth
20 Hz to 20 kHz +/-0.1 dB typical
Performance: Frequency Response
<10 Hz to 80 kHz, -3 dB
Performance: Phase Deviation (I/O)
+1 deg @ 20 Hz, -5 deg @ 20 kHz into 2 kOhms load
Performance: Insertion Loss
21 dB typical
Performance: Harmonic Distortion (THD+N)
0.003% typical @ 50 Hz, 0 dBu
0.002% typical @ 1 kHz, 0 dBu
0.002% typical @ 10 kHz, 0 dBu
Performance: Noise Floor
-120 dBu, 22 Hz to 22 kHz, unweighted
Performance: Dynamic Range
153 dB, 22 Hz to 22 kHz, unweighted
Power Supply: Ground
Switchable: Ground / Lift
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
1.5 lbs. (0.68 kg)
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