• Black Lion Audio BLA B173 Microphone Preamp Mic Pre 1/2 Rack

Introducing Black Lion Audio’s own 1073-style microphone preamp, the B173! Don’t let the price tag fool you. This is not only a serious contender for the most “bang for your buck” preamp in existence, but sonically stands on its own at any price point. Our goal was to capture the essence of the original 1073 at a price anyone can afford, and we’re proud to say that we’ve accomplished our goal! Tape Op gave it a run, and couldn’t agree more. Give the B173 a try and prepare to be blown away!

The B173 is Black Lion Audio’s homage to the highly revered 1073 mic pre. The B173 is a single channel mic preamp with input and output transformers, stepped gain, output level control, phantom power, and phase. It features a DI, 80dB of gain, and is housed in a 1U, 1/2 rack chassis.

Front
POWER: flip switch up to turn preamp on (there’s a 2-3 minute “warm up” time for lowest distortion), flip switch down to turn preamp off
MIC GAIN (stepped, 12-position switch): clockwise rotation yields an increase in input signal amplitude, counterclockwise rotation yields a decrease in input signal amplitude
48v: engage to turn phantom power on, disengage to turn phantom power off
PHASE (Ø): engage to adjust input signal polarity by 180°, disengage to leave input signal polarity unchanged
OUTPUT LEVEL: clockwise rotation yields less attenuation, counterclockwise rotation yields more attenuation (for beginners, it’s best to leave the output level fully clockwise and increase Mic Gain as needed so as not to saturate the input transformer)
DI: engage to select front panel TS jack as input source, disengage to select rear panel XLR jack as input source

Back
OUTPUT: balanced, line-level TRS output
INPUT: balanced, mic-level XLR input
GND: internal chassis ground
POWER: 24VAC input jack (only use a BLA-specified power supply)

Features
  • Cinemag Input Transformer
  • Edcor Output Transformer
  • 80dB Gain
  • D.I. Input (active, unbalanced)
  • Phantom Power
  • Phase Switch
  • Output Attenuator
  • XLR Microphone Input
  • TRS Line Output (balanced)
Mic Section
  • Max Microphone Input Level: +1dBu
  • Input Impedance: 200Ω
  • Pad: None
  • Gain (no pad): +13dB to +80dB
  • Equivalent Input Noise (noise floor): -105dBu
  • THD+N (@ +4dBu output):
  • .10% @ +9 dBu
  • .12% @ +35 dBu
  • .13% @ +45 dBu
  • .16% @ +60 dBu
  • .85% @ +76 dBu
  • Bandwidth (1kHz, 150Ω source, unweighted): 10Hz to 30kHz
D.I. Section
  • Max D.I. Input Level: +18dBu
  • Input Impedance: 1.1MΩ
  • Pad: None
  • Gain: Up to +25dB of gain
  • Equivalent Input Noise (noise floor): -100dBu
  • THD+N (@ +4dBu output):
  • .021% @ +10 dBu
  • .016% @ +20 dBu
  • Bandwidth (1kHz, 600Ω unbalanced source, unweighted): 10Hz to 30kHz
Output Section
  • Max Output Level: +28dBu
  • Output Impedance: 600Ω
Power Supply
24VAC, 500mA External Supply
Product Dimensions
9.5” x 6.5” x 1.75”
Product Weight
3.2 lbs

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Black Lion Audio BLA B173 Microphone Preamp Mic Pre 1/2 Rack

  • Brand: Black Lion Audio
  • Product Code: BLA B173 Microphone Preamp Mic
  • Availability: In Stock
  • $549.00
  • $499.00

  • Ex Tax: $499.00

Tags: Black Lion Audio BLA B173 Microphone Preamp Mic Pre 1/2 Rack