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Product information

Optical all-tube compressor with output transformers
The WA-1B is an accurate replica of a world-class Scandinavian compressor, combining gentle tube-like warmth with precise control . Like the original, favored by producers and engineers from Chris Lord-Alge to Rick Rubin, the WA-1B delivers the sought-after "forgiving" compression of tube optical circuit with the speed and control more commonly associated with modern dynamic processing. The WA-1B was wired by hand to authentically replicate the original circuit. The combination of large core transformers from Lundahl Sweden, selected tubes from JJ and Tung-Sol and a first-class opto-coupler guarantee an ultra-fast and precise sound without sacrificing authentic analog warmth.

  • 1 channel opto-coupler based all-tube compressor with output transformers
  • Accurate replica of a world-class Scandinavian compressor
  • Gentle warmth from optocoupler-based tube compression combined with precise control
  • True to original 270 Volt, 100% discrete analog signal path - hand-wired with through-hole components
  • Transformer-balanced, fully floating input and output - large transformers with special core from the Scandinavian manufacturer Lundahl in Sweden
  • 12ax7 Tung-Sol & JJ 12au7 tubes
  • frequency response @ -3 dB: 5 Hz to 25 kHz
  • Self-noise: < -75 dBU @ 30 dB amplification
  • CMRR: >60dB @ 10kHz
  • Gear ratio from 2:1 to 10:1
  • Variable threshold: Off to -40 dBU
  • Infinitely adjustable attack and release times: fast-slow
  • Output gain: Off to +30 dBU
  • Balanced XLR and jack inputs and outputs
  • impedance: 600O
  • Two bus connections for connection multiple sidechains
  • Meter (VU) for input, output or compression strength
  • Linear, low-noise mains adapter with toroidal transformer
  • weight: 3.9kg
  • dimensions: 48.3 x 18.4 x 8.9 cm
  • Type: Optical all-tube compressor with output transformers
  • Number of channels: 1
  • Displays: Analog VU meter
  • Bypass: Switchable
  • Dimensions: 483x184x89mm
About Warm Audio

The high-end garage manufacturer Warm Audio has set out to preserve the legacy of Vintage audio equipment and microphones for posterity. Their credo is noticeably simple: They build high-quality recording equipment that remains affordable for hobby musicians and sound engineers. Since its founding in 2011, owner and company boss Bryce Young has gathered a team of audio experts that combine well over 50 years of experience in the areas of production, production, marketing and sales of pro audio devices.

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