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Behringer 73 Mic Preamp for 500 Series

BH #BE73 • MFR #0838-AAY86-001
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Behringer 73 Mic Preamp for 500 Series
Key Features
  • Classic 1073-Style Mic Preamp
  • Class A, All-Discrete Circuitry
  • Custom Midas Input/Output Transformers
  • 80 dB Stepped Gain Control
The Behringer 73 brings the unmistakable character of the classic 1073 microphone preamp to the modern 500 Series format. Faithfully designed in collaboration with one of the original engineers, this premium preamp captures the warmth, punch, and musical detail that defined countless recordings by artists like Led Zeppelin, the Beatles, and Stevie Wonder. Compact yet uncompromising, the 73 is built for today’s studios that demand heritage tone and modern reliability.
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Behringer 0838-AAY86-001 Overview

The Behringer 73 brings the unmistakable character of the classic 1073 microphone preamp to the modern 500 Series format. Faithfully designed in collaboration with one of the original engineers, this premium preamp captures the warmth, punch, and musical detail that defined countless recordings by artists like Led Zeppelin, the Beatles, and Stevie Wonder. Compact yet uncompromising, the 73 is built for today’s studios that demand heritage tone and modern reliability.

Classic Sound, Modern Design
At its heart, the 73 features a Class A, all-discrete signal path for uncompromising sonic integrity. Custom-built Midas input and output transformers deliver rich harmonics and pristine headroom while maintaining the smooth, open sound of the original circuit. With up to 80 dB of precision gain via a resistor-stepped rotary switch, it provides noise-free amplification for everything from delicate ribbon microphones to line-level signals and instruments.
Precision Control and Flexibility
A dedicated Trim control offers fine adjustment for perfect level matching, while illuminated switches make it easy to access key functions such as phase invert, Hi/Lo impedance, and front/rear input selection. A signal indicator and intuitive phantom power LED with automated protection ensure safe and accurate operation in any session. The solid steel chassis not only provides rugged durability, but also shields against interference when racked alongside other modules.
Details in Brief
  • High-performance 500 Series microphone/line preamp based on the iconic 1073 design
  • All-discrete Class A topology ensures transparent, low-noise performance
  • Custom-built Midas input and output transformers preserve warmth and musical detail
  • Electronically controlled 80 dB rotary gain switch provides precise and repeatable settings
  • Trim control includes integrated 48V phantom power for condenser mics
  • LED signal indicator and intuitive phantom power light with automatic safety switching
  • Illuminated controls for Phase, Hi/Lo Impedance, and Front/Rear Input selection
  • Transformer-balanced combo input connectors handle mic, line, or instrument sources
  • Built from premium components within a rugged steel chassis for maximum reliability
  • Compact footprint makes it ideal for modular recording setups and hybrid workflows

Behringer 0838-AAY86-001 Specs

Inputs/Outputs
Audio I/O
1x Combo XLR-1/4" Input
Microphone Input
Type: XLR and 1/4" TRS Combo, Transformer Balanced Front, Connection to 500 Series Rack Input Connector, Transformer Balanced Rear
Impedance: 1200 Ohms / 300 Ohms, Balanced
Max Input Level: +10 dBu
Sensitivity: -20 dB to -80 dB in 5 dB Steps
Mic EIN @ 80 dB Gain, 22 Hz to 22 kHz: -125 dBu Unweighted
Line Input
Type: XLR and 1/4" TRS Combo, Transformer Balanced Front, Connection to 500 Series Rack Input Connector, Transformer Balanced Rear
Impedance: > 4 Kilohms, Balanced
Max Input Level: +28 dBu
Sensitivity: -20 dB to +10 dB in 5 dB Steps
Noise at Unity Gain, 22 Hz to 22 kHz: -83 dBu Unweighted
Audio Outputs
Type: Connection to 500 Series Rack Input Connector, Transformer Balanced Rear
Impedence: < 100 Ohms Balanced
Max Output Level: +28 dBu with 100 Kilohm Load, +26 dBu with 600 Ohm Load
Frequency Response
20 Hz to 20 kHz, ±0.5 dB
THD+N
<0.07%, 50 Hz to 20 kHz, +4 dBu
Noise
-83 dB, 22 Hz to 22 kHz Unweighted
Audio Circuit Type
Discrete Class-A Amplifiers
Controls
Buttons
Phase / Polarity Reverse
LO Z, 1200 Ohms / 300 Ohms, Operates Mic Input Only
FR I/P, Switches between 500 Series Rack Input and Front Combo Connectors
Controls
Rotary Sensitivity Switch, +10 to -80 dB in 5 dB Steps
Trim Control, -20 dB to +5 dB with Unity Gain Center Detent
+48 V Phantom Power, Press Trim Control Knob to Enable/Disable
Sig LED
Off = < -25 dBu, Green = > -25 dBu, Red = > +26 dBu
Power
Power Source
Proprietary Interface
Operating Current
200 mA
Physical
Mounting
Multiple 500 Series
Color
Blue
Operating Conditions
41 to 113°F / 5 to 45°C
Dimensions
6.9 x 5.2 x 1.5" / 176.4 x 132.1 x 37.9 mm
Weight
2.4 lb / 1.1 kg
Packaging Info
Package Weight
2.925 lb
Box Dimensions (LxWxH)
10.6 x 8.9 x 3.5"

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