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Item# DBX580


Mic Preamp - 500 Series

The dbx 580 Microphone Preamp is the perfect partner to your microphones, providing sonically-transparent gain that will reveal the detail and audio signature of even the most esoteric microphones. It will transform their low level output signal to a high level, high current output for direct connection to the line level inputs of your mixer, sampler or any other recording medium that accepts line level, analog input. With its modular 500 Series design, the dbx 580 delivers up to 60dB of gain, features a variable-frequency Low-Cut Filter and unique Low and High Detail Equalization Controls, a 20dB Pad, Polarity Invert, +48V Phantom Power, a Front Panel Instrument Input, VU Metering and Peak Indicator. Add warmth and definition to your microphones with the dbx 580 Microphone Preamp!

General Specifications

Input Type
Electronically balanced/unbalanced, RF filtered
Input Impedance
Max Input Level
+15 dBu balanced or unbalanced (20dB PAD disabled) +35 dBu balanced or unbalanced (20dB PAD enabled)
Maximum Gain
>60 dB; typically >70 dB from 20 Hz – 20 kHz
Instrument Input Connector
Tip-Sleeve ¼” Jack
Instrument Input Type
Instrument Input Impedance
500 k Ω
Max Instrument Input Level
+21 dBu unbalanced
Output Type
Electronically balanced/unbalanced, RF filtered
Output Impedance
Balanced 30Ω , unbalanced 15Ω
Max Output Level
+22 dBu
Typically > -128.0 dBu, 150 Ω source impedance, 22 kHz bandwidth, unweigh
Frequency Response
20Hz - 20kHz, +0/-1dB; <10Hz - 30kHz, +0/-3dB
<0.006% typical, 20Hz - 20kHz, 0dBu out
Power Requirements
+/- 16V DC
Power Current Draw
80 mA per power rail
Power Draw
2.56 watts
Rack System Compatibility
500 Series Compatible Power-frame
Rack Space
1 Slot


5.25 in (13.34 cm)
1.5 in (3.81 cm)
6 in (15.24 cm)
1.3 lbs (0.59 kg)
Shipping Weight
1.7 lbs (0.77 kg)

What's in The Box?

  • 1 x dbx 580

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