Antelope A4-1B Analog Automated Opto Valve Compressor
€1,995.00
- 100% analog audio signal path
- Optical valve compressor with pre-sorted opto-cell
- All-tube push-pull amplifier
- Custom-designed UK transformers
- Continuously variable ratio, attack and release
- Fixed, manual and hybrid timing modes
- A4 hardware automation with motorized potentiometers
- DAW control via VST3, AAX and AU plugin
- Automation of attack, release, gain, threshold and ratio
- Preset recall and A/B comparison
- Low-pass, high-pass and band-pass sidechain filters
- Dedicated de-essing mode
- VU meter for input, compression and output
- Calibrated stereo-link operation.
Product information "Antelope A4-1B Analog Automated Opto Valve Compressor"
The Antelope Audio A4-1B is a professional analog opto valve compressor that combines classic tube-based optical compression with modern DAW automation and recall. Its audio path is 100% analog, using custom-designed UK transformers, high-quality tubes, a pre-sorted opto-cell and an all-tube push-pull amplifier to provide precise, musical dynamics processing.
The compressor provides continuously variable ratio, attack and release controls alongside fixed, manual and hybrid timing modes. Ratio ranges from 2:1 to 10:1, attack from 0.5 ms to 300 ms, release from 50 ms to 10 seconds, and makeup gain reaches +30 dB. Maximum input and output levels are both +24 dBu, providing substantial headroom for professional recording, mixing and mastering.
A key feature is Antelope Audio Analog Automation (A4). The dedicated A4-1B DAW plugin remotely controls the hardware through proprietary motorized potentiometers. Attack, release, gain, threshold and ratio can be automated directly from a DAW, while presets provide instant recall and quick A/B comparison. The plugin is available in VST3, AAX and AU formats.
The sidechain section provides low-pass, high-pass and band-pass filtering, plus a dedicated de-essing mode using a narrow band-pass filter. A front-panel VU meter can monitor input, compression and output with multiple reference levels.
| Safety Warnings: | The specific safety instructions for the product are provided in its user manual. |
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Antelope
Elektrosfera ltd.
14A ‘Srebarna’ Street, Sofia, Bulgaria
office@antelopeaudio.com
https://www.antelopeaudio.com
- Product Type: Analog Automated Opto Valve Compressor
- Model: A4-1B
- Audio Signal Path: 100% Analog
- Compression Type: Optical / Tube Compressor
- Opto Cell: Pre-Sorted for Compression Precision
- Amplifier: All-Tube Push-Pull Amplifier
- Transformers: Custom-Designed UK Transformers
- Ratio: 2:1 – 10:1, Continuously Variable
- Threshold: Off to -40 dBu
- Attack: 0.5 ms – 300 ms
- Release: 50 ms – 10 s
- Gain: Off to +30 dB
- Timing Modes: Fixed, Manual and Hybrid
- Maximum Input Level: +24 dBu
- Maximum Output Level: +24 dBu
- Noise Level: < -80 dBu
- Input Impedance: 10 kΩ Differential
- Output Impedance: <60 Ω
- Frequency Response: 20 Hz – 20 kHz ±1 dB
- Sidechain Filters: Low-Pass, High-Pass and Band-Pass
- De-Esser: Narrow Band-Pass De-Essing Mode
- Metering: VU Meter for Input, Compression and Output
- Automation: Antelope Audio Analog Automation (A4)
- Hardware Control: Proprietary Motorized Potentiometers
- DAW Automation: Attack, Release, Gain, Threshold and Ratio
- Plugin Formats: VST3, AAX and AU
- Preset System: File Presets with Quick A/B Testing
- Stereo Link: Calibrated Stereo-Link System
- Power Supply: 95–245 V, 50–60 Hz
- Operating Temperature: 0–50 °C
- Dimensions (H × W × D): 88 × 483 × 252 mm
- Weight: Approx. 4.4 kg
- Included: A4-1B Compressor, Power Cable, USB-C to USB-C Cable, Get Started Leaflet
