OC1
500 Series Opto Compressor
The Drawmer OC1 brings uncompromising optical compression to the 500 Series, combining the smooth, musical response of a classic opto design with the flexibility of a modern studio processor. Featuring full control over threshold, ratio, attack, release, input, output, and parallel mix, it delivers transparent dynamics control for vocals, acoustic instruments, bass, and mix buses. Exclusive BIG and AIR modes refine low and high frequencies during compression, while Drawmer’s CRUSH saturation adds subtle analog warmth and harmonic richness. Stereo linking, precision stepped controls, and comprehensive metering make the OC1 an exceptionally versatile compressor for professional recording and mixing.
Classic Optical Compression, Modern Control
The Drawmer OC1 delivers the smooth, transparent character of optical compression in a compact 500 Series format without compromising on control or performance. Designed for professional recording and mixing, it provides natural, programme-dependent dynamics processing that preserves musicality while adding cohesion and polish to any source.
Comprehensive Dynamics Processing
Unlike many 500 Series compressors, the OC1 features a complete control set, including Input, Output, Threshold, Ratio, Attack, Release, and Wet/Dry Mix controls. Precision 21-position detented knobs ensure accurate, repeatable settings, while PGM mode intelligently adapts release times to programme material for smoother compression with reduced pumping.
BIG, AIR & CRUSH
Borrowed from Drawmer’s acclaimed 1973 compressor, BIG mode reduces sidechain sensitivity to low frequencies, producing tighter, more natural bass response. AIR mode preserves high-frequency detail and openness throughout compression, while the integrated CRUSH circuit adds harmonic saturation, analog warmth, and enhanced musical presence when desired.
Built for Professional Workflows
Comprehensive VU metering displays gain reduction or selectable input/output levels, while hard-wire bypass guarantees completely transparent signal comparison. Dedicated stereo linking allows adjacent OC1 modules to operate as perfectly matched stereo or multi-channel compressors, making the OC1 equally at home on individual tracks, stereo buses, and mastering chains.
Features
- Fully featured soft-knee optical compressor with smooth, transparent dynamics control
- Precision 21-position detented controls for accurate, repeatable settings
- Dedicated Input and Output gain controls for flexible gain staging
- BIG and AIR modes enhance low-end impact and preserve high-frequency detail
- PGM mode delivers intelligent programme-dependent release for more natural compression
- Integrated CRUSH harmonic saturation adds warmth, depth, and analog character
- Wet/Dry mix control for effortless parallel compression
- Stereo and multi-channel linking via the 500 Series link bus
- Comprehensive VU metering with Gain Reduction, Input, and Output monitoring
- Hard-wire bypass for completely transparent signal comparison
- Legendary Drawmer engineering, reliability, and build quality
- Designed and handmade in the United Kingdom
Specifications
| Input Impedance | 20k Ohms |
| Maximum Input Level | +18 dBu |
| Output Impedance | < 100 Ohms |
| Frequency Response | 20 Hz – 20 kHz ±0.2 dB |
| THD & Noise @ 1 kHz, ref 0 dBu |
0.04% |
| THD & Noise @ 1 kHz, ref 10 dBu |
1% |
| Noise at Unity Gain Dry Mix Control |
−98 dBu |
| Weight | 0.38 kg |
In the interests of product development, Drawmer reserve the right to modify or improve specifications of this product at any time, without prior notice.
