• 100% purely analog circuit for the audio signal
• High-quality components ensuring superior sonic performance
• Custom-designed UK transformers and high-quality tubes
• Pre-sorted opto-cell for optimal compression precision
• All tube-based push-pull amplifier
• Continuously variable ratio, attack and release time
• Fixed, manual and hybrid timing modes
• Ensured compression precision over time
• Modern power supply for tube longevity and reduced humming
• Consistent stereo-link performance via calibration system
• VU-meter for monitoring input, compression and output
• Multiple reference levels for metering
• Remote control via the A4-1B DAW plugin, available in VST3, AAX and AU formats
• Settings instantly applied on hardware via proprietary motorized potentiometers
• Comprehensive file preset system, with option for quick A/B testing
• Automation for attack, release, gain, threshold and ratio via the DAW plugin
• Extended filtering section with low pass, high pass and band pass filtering for side chain signal
• De-essing mode utilizing narrow band pass filter
Ratio: 2:1 to 10:1 (continuously variable)
Threshold: off to -40 dBu
Attack: 0.5 ms to 300 ms
Release: 50 ms to 10 s
Gain: off to +30 dB
Maximum output level: +24 dBu
Maximum input level: +24 dBu
Noise level: < -80 dBu Input impedance: 10 kOhm differential Output impedance: <60 Ohm Frequency response: 20 Hz to 20 kHz ±1 dB Power: 95 V/245 V, 50-60 Hz Operating temperature: 0-50°C, 32-122°F
• A4-1B analog compressor
• Power cable
• USB-C to USB-C cable
• Get Started leaflet
• A4-1B Plugin Perpetual License leaflet (only with Complete and Ultimate editions)
A4-1B (approx.)
Height: 88 mm (3.47 in)
Width: 483 mm (18.98 in)
Depth: 252 mm (9.92 in)
Weight: 4.4 kg (9.70 lbs)
Box (approx.)
Height: 140 mm (5.51 in)
Width: 640 mm (25.20 in)
Depth: 350 mm (13.78 in)
Weight: 6.5 kg (14.33 lbs)
