Detail 01
31-position fully detented controls
They support repeatable settings and consistent pairing of two units for dual-mono work.
Product detailSKU #1500000477735
Rupert Neve DesignsOptoFET Dual Stage Compressor
1/15
Independent shopping perspective
The Korena take
OptoFET is a single-channel, 1RU analog compressor and wave shaper that combines FET and optical compression. Dual Stage places the two sections in series; Dual Band divides lows and highs at a variable 50Hz–500Hz crossover, with FLIP changing the order or section assignment. Both stages have independent Blend controls for parallel processing, and ±12dB input and output trim assist gain staging. GRIT on the FET side and BLOOM on the optical side add dedicated harmonic options, while the transformer-balanced XLR output completes the signal path.
Strong match
Who this is for
- Tracking, mixing, mastering, or sound-design sessions requiring two compression approaches in one channel.
- Controlling peaks and smoothing level in series, then blending each compressor in parallel.
- Targeting low and high bands independently with a crossover chosen from 50Hz to 500Hz.
Consider the trade-offs
When to look elsewhere
- A single unit is not a dual-channel stereo setup; two units are used for dual-mono stereo work.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
FET attack range
The FET section reaches attack times as fast as 100 microseconds, with adjustment up to 50ms.
Detail 03
Optical attack range
The optical section starts at 5ms and adjusts up to 50ms.
Final check
Know before you order
- 01Allow one 1RU rack space; the chassis measures 19 × 8.25 × 1.75 inches.
- 02The unit has an XLR line input and transformer-balanced XLR line output.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What is the difference between Dual Stage and Dual Band?
Dual Stage runs the FET and optical compressors in series. Dual Band uses a crossover and assigns the sections to low or high frequency bands.
02What do GRIT and BLOOM do?
GRIT turns the FET section into a harmonic-forward wave shaper with upper-frequency distortion. BLOOM increases low-order harmonic content in the optical section.
03Can OptoFET be used for stereo work?
Yes, by pairing two units for dual-mono stereo operation.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsSound
- Low Frequency Extension
- Below 5Hz–183kHz -3dB
- Frequency Response
- 6Hz–70kHz ±0.1dB
6 detailsConnections & power
- Input Impedance
- 10 kohm
- Output Impedance
- 40 ohm
- Output
- XLR line output
- Maximum Output Level
- +24dBu at 1kHz
- Input
- XLR line input
- Maximum Input Level
- +24dBu at 1kHz
5 detailsSize & weight
- Noise Bandwidth
- 22Hz–22kHz
- Weight
- 8
- Shipping Weight
- 9 lb.
- Unit Weight
- 8 lb.
- Dimensions
- 19 inch × 8.25 inch × 1.75 inch
8 detailsOther
- Thd N At 20dbu
- 0.0006%
- Thd N At 0dbu
- 0.002%
- Product Type
- Dual compressor rack unit
- Attack Time
- 5ms–50ms
- Noise
- -93dBu 22Hz–22kHz
- Form Factor
- 1RU rackmount
- Noise Level Line Path
- -96dBu
- Release Time
- 50ms–1.5s
