Up to 36 months promotional financing* on qualified products! For more info, click here.

Black Lion Audio B173 500 Preamp

Classic 1073 sound in 500 format

View more products from:

Black Lion Audio
Included with your purchase:
  • Free Shipping (USA)
  • Free Tech Support
  • Free Extended Warranty
Our Price: $599.00

24-month financing with the Vintage King credit card

This item ships directly from Black Lion Audio to you!

To ensure that the manufacturer currently has stock, please chat, call or email for the latest availability status.

Need expert advice? Click here.

Product Description
Additional Information
  • Product Description

    The B173 is one of the most “bang for your buck” preamps in existence, and is now available in the 500 series format. The Black Lion Audio B173 500 not only delivers the beefy lows, buttery mids, and polished highs of a classic 1073 preamp, but does so at a fraction of the price!

    The preamp and line amp circuitry found in the B173 500 is identical to the original B173. Not a single component or design feature was compromised while converting it to a smaller package. As a result, the circuit boards are jam packed with all sorts of delicious components, including a brawny Cinemag input transformer!

    The power supply is the backbone of any preamp design, and can make a huge impact on the overall sound and performance of the preamp. The +24V rail needed to power the B173 500 is painstakingly converted from the +/- 16V rails of a 500 series rack using a custom DC-DC converter circuit specially designed to keep any unwanted noise or modulations out of the signal path. Complete isolation is then achieved through the use of inductors, ferrite beads, decoupling capacitors, power regulation, and a custom enclosure surrounding the entire circuit.

    The B173 500’s “Class A”, discrete circuitry combined with high-end components provide a fresh approach to a classic sound that won’t disappoint. Thanks for your purchase and continued support of Black Lion Audio!


    • 500 Series format (500 series rack required for use)
    • Cinemag Input Transformer
    • Edcor Output Transformer
    • 80 dB Gain
    • Hi-Z Input (passive, unbalanced)
    • Phantom Power
    • Phase Switch
    • Output Attenuator


    • Max Microphone Input Level: +1 dBu
    • Input Impedance: 200Ω
    • Gain: +12dB to +80dB
    • Equivalent Input Noise (noise floor): -103 dB
    • THD+N Mic Section (@ +4dBu output): .072% @ +8 dBu Gain; .074% @ +29 dBu Gain; 082% @ +44 dBu Gain; .152% @ +60 dBu Gain; .709% @ +76 dBu Gain
    • Bandwidth: (1 kHz, 150 Ω source, unweighted): 10 Hz to 30 kHz
    • THD+N (@ +4dBu output) Hi-Z Section: .0045% @ +10 dBu; .0076% @ +15 dBu
    • Max Output Level: +29 dBu
    • Output Impedance: 600Ω
    • +24 V provided by ultra low noise, custom power supply (500 series rack required)
    • Products Dimensions: 1.5 x 6.5 x 5.25 in
    • Product Weight: 1.2 lb
    • Shipping Dimensions: 13 x 13 x 5 in
    • Shipping Weight: 3 lb
  • Additional Information

    Condition New
    Unit Weight 3 lb
    Chassis 500 Series
    Input Connectors Analog XLR
  • Reviews

    This product currently has no reviews.

    Write Your Own Review

    Only registered users can write reviews. Please, log in or register

  • View FileBlack Lion Audio B173 500 Manual (242.27 KB)