The A4-1B combines the legendary sound and design of the analog Opto-Tube compressor with modern workflow enhancements. Discover its signature hardware audio processing or go further with access to a range of contemporary features. The A4-1B was designed to preserve the smoothness and musicality so beloved of vintage Opto-Tube units. Even when pushed to the limit, the compressor remains transparent, breathing new life into vocal, bass, keys, or percussion tracks. The A4-1B sounds and responds exactly like the legendary hardware that inspired it, allowing you to apply the legendary sound of Opto-Valve compression to your modern production.
Features:
- Automatable analog tube optical compressor
- Motorized potentiometers
- Fully analog signal path
- British output transformer
- Configurable high-pass, band-pass, and de-essing filters
- Continuously adjustable attack and release times
- Continuously adjustable ratio from 2:1 to 10:1
- Frequency response: 20 - 20,000 Hz (+/- 1 dB)
- Self-noise: < -80 dBU
- Variable threshold: Off (+20 dBU) to -40 dBU
- VU meter for input, compression, or output
- 3 different timing modes: Fixed, Manual, Hybrid
- Adjustable output gain from Off to +30 dBU
- Input impedance: 10 kOhm
- Balanced inputs and outputs on XLR and jack
- 2 busses for connecting multiple sidechains
- 1 port USB-C
- Perpetual DAW plugin license (VST3, AU, and AAX) for remote control, automation, filtering, and preset recall
- 2-year subscription for Synergy Core Native with over 70 effects
- Includes: Power cable, USB (C/C) cable, starter datasheet, and A4-1B plugin datasheet for perpetual license
- Dimensions (W x H x D): 483 x 88 x 252 mm
- Weight: 4.4 kg
nl 
