PMT Audio
Rupert Neve Designs OptoFET Dual Stage Compressor

Rupert Neve Designs

OptoFET Dual Stage Compressor

Compressor

From Rupert Neve Designs:

From transparent vocal smoothing to extreme envelope shaping with massive harmonic texture, the OptoFET is a highly versatile analog compressor & wave shaper that combines a newly-designed FET compression circuit with an optimized Optical compression circuit into a single rack space.

There are two primary compression modes: in Dual-Stage mode, the FET and OPTO compressors are used in series for complete dynamic control over critical sources, accomplishing a common recording & mixing technique with ease. In Dual-Band mode, each compressor is assigned to either a low or high frequency band that can then be processed independently, which expands the tone-shaping and dynamic control of the OptoFET into uncharted territory.

For many years, the engineering team at RND has experimented with FET compressor designs – but it wasn’t until the OptoFET concept was solidified that releasing our first FET circuit felt ‘right’. While this FET compressor has some familiar characteristics, including ultra-fast attack times and common ratio settings, there are also several features that make it instantly feel like a Rupert Neve Designs product and nothing else.

Specs

Measurement conditions
All specifications are typical.
Input impedance (XLR line in to XLR line out, compressor bypassed)
10 kΩ
Output impedance
40 Ω
Maximum input level @ 1 kHz
+24 dBu
Maximum output level @ 1 kHz
+24 dBu
Noise (22 Hz - 22 kHz BW)
-96 dBu
Frequency response
6 Hz to 70 kHz: +/- 0.1 dB; <5 Hz to 183 kHz: -3 dB
THD+N @ 1 kHz
0 dBu: 0.002%; +20 dBu: 0.0006%
FET compressor
Noise (22 Hz - 22 kHz BW): -82 dBu; Attack Time: 100μS – 50mS; Release Time: 50mS - 1.5S
Opto compressor
Noise (22 Hz - 22 kHz BW): -93 dBu; Attack Time: 5mS – 50mS; Release Time: 50mS - 1.5S
Dimensions
1RU: 19” W x 8.25” D x 1.75” H (48.3 cm W x 21 cm D x 4.5 cm H)
Weight
8 lbs. (3.6 kg)

Source: Rupert Neve Designs OptoFET product page