The 013 FET is a solid-state small-diaphragm condenser microphone in Soyuz's signature cream-and-brass finish. It's built around the custom S13 capsule with a 25mm gold-sputtered diaphragm and a proprietary toroidal transformer - unlike the transformerless 011 FET, the 013 FET's signal path is transformer-coupled, giving it a denser, more analog character.
Transformer density without losing small-diaphragm speed
Small-diaphragm mics are prized for fast transient response, but many transformerless designs sound thin in the low end and midrange as a result. The 013 FET pairs the S13 capsule's fast response with the density and warmth of its proprietary toroidal transformer, so recordings of acoustic guitar, piano, or drum overheads keep detail without sounding thin or sterile. A 143dB maximum SPL rating and 16dB(A) self-noise give plenty of headroom on louder sources without sacrificing clarity on quiet ones.
One body, several polar patterns
A fixed cardioid pattern limits technique choice - stereo XY or ORTF means switching to a different mic if a session calls for omnidirectional or hypercardioid pickup. The 013 FET's swappable capsule solves that without buying a second microphone: the same body runs cardioid, hypercardioid, or omnidirectional, so one unit covers more scenarios, from a single spot mic to spatial recording with an additional capsule.
KEY FEATURES
- Small-diaphragm FET condenser microphone
- S13 capsule, 25mm gold-sputtered diaphragm
- Proprietary toroidal transformer
- Cardioid pattern, with optional hypercardioid and omnidirectional capsules
- Included -10dB pad, screws in between capsule and electronics
- Cream and brass finish
- 48V phantom power
- Includes wooden case and microphone clip
TECHNICAL SPECIFICATIONS
- Type: small-diaphragm FET condenser microphone
- Capsule: S13, 25mm gold-sputtered diaphragm
- Polar pattern: cardioid (optional hypercardioid, omnidirectional)
- Frequency range: 20Hz - 20kHz
- Sensitivity: 20mV/Pa
- Impedance: 150 Ohms
- Maximum SPL: 143dB
- Self-noise: 16dB (A-weighted)
- Powering: 48V phantom
- Pad: -10dB, screw-in
- Length: 122mm, diameter: 25mm (capsule head: 24mm)
- Weight: 200g
- Included accessories: wooden case, microphone clip




