Black Lion Audio B172A | Hybrid FET/Opto Compressor


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  • Hybrid FET/Opto Compressor
  • 76 & 2A style
  • Cinemag 2A input transformer
  • Chicago-wound 76 and 2A output transformer
  • Specially designed Black Lion Audio T4B opto element

Produkt vergleichenGTIN: 719452994613 SKU: A70068 Categories: ,

Two classics in one package: The B172A combines the Seventeen version of the legendary “76” FET limiter with the famous “2A” optical compressor. Whether the FET and opto compressor are used individually or in series, the B172A impresses with its incredible sound and versatility. The B172A’s Dual Mono Link makes it easy to route the signal through circuits 17 and 2A in any order. In addition, the B172A offers ultra-convenient access to a pair of classic dynamics processors while providing a valuable signal processing tool never before available in a single chassis.

  • FET/ Opto Compressor
  • Mic/ Line XLR + TRS inputs and outputs
  • A/B, B/A and independent signal routing switchable
  • High quality signal path and power decoupling capacitors
  • Link function
  • 2U 19″

FET/ Opto Compressor

Great care was taken in selecting the best transformers for each circuit. The unit is equipped with a Cinemag input transformer on the 2A side and BLA’s own Chicago-wound output transformers in both circuits. High-quality signal path and decoupling capacitors are also built in.

In addition to a VU meter for each of the two compressors, bypass switches are available to compare the unprocessed signal with the processed one.

The options for the parameters of both compressors look as follows:

  • 17:
    • Attack: continuously variable from 20 µS to 800 µS
    • Release: continuously variable from 50mS to 800mS
    • Ratio: 4:1, 8:1, 12:1, 20:1
  • 2A
    • Attack: Dictated by T4BLA
    • Release: Dictated by T4BLA
    • Compressor or Limiter


Number of analog inputs


Number of analog outputs





sym. Jack, XLR



Einheiten (HE)



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