The WA-1B accurately recreates world-class Scandinavian compression combining smooth tube-optical warmth with precision controls. Like its original inspiration favored by artists such as Adele, Dr. Dre, Lenny Kravitz, Norah Jones, the WA-1B delivers the revered “forgiving” musical compression favored on epic vocal recordings and much more.

Product Description & External Specs (Per Channel)

• All-Tube, Transformer-Balanced Optical Compressor
• Output gain: Off to +30 dBU
• Input impedance: 600Ω
• Two bus connectors to connect multiple sidechains
• Meter (VU) input, output, or compression amount
• Linear, low-noise power supply with toroidal power transformer
• Chassis Depth: 9.25" | 23.13 cm

Components & Internal Specs (Per Channel)

• True-to-spec 270 volt, 100% discrete analog signal path - handwired with through-hole components
• Transformer-balanced fully floating input and output - Custom-core large transformers from Scandinavian manufacturer Lundahl in Sweden
• Premium vacuum tubes

Performance Specs (Per Channel)

• Frequency response @ -3 dB: 5 Hz to 25 kHz
• Self-Noise: < -75 dBU @ 30 dB gain
• CMRR: > 60 dB @ 10 kHz
• Ratio from 2:1 to 10:1
• Variable Threshold: Off to -40 dBU
• Continuously variable, fixed, or fixed/manual attack and release times
• Fixed - Attack: 1 millisecond | Release: 50 milliseconds 
• Manual - Attack: 0.5 - 300 milliseconds | Release: 0.05 seconds - 10 seconds
• Fixed/Manual mode blends the release times of fixed and manual modes

More info: WA-1b