The FET-17 is a Greenbox design created to deliver a unique sonic signature—velvety, rich in harmonic detail, and extremely controlled, even in high sound pressure level (SPL) situations. Its design was carefully crafted to offer tonal balance, musicality, and excellent definition across a wide range of recording applications.
To achieve this, the FET-17 combines a high-performance cardioid RK-87 capsule with exclusive circuitry developed by Greenbox. Its transformerless FET circuit was meticulously engineered to provide high capture capability, excellent sensitivity, and a balanced, natural response, preserving nuances, textures, and details with great precision.
Every stage of the circuit was developed to maintain excellent definition and control, even at high SPLs. Its performance contributes to smooth, well-defined high frequencies, helping to reduce excessive sibilance without compromising brightness, presence, or detail.
The result is a microphone with a refined, natural, and extremely pleasing tone, capable of capturing nuances and textures with great precision on both vocals and instruments.
The body is constructed entirely of steel, featuring a three-layer paint job and a semi-gloss varnish finish, ensuring high durability and a sophisticated look. The FET-17 excels in both studio and live applications: it performs brilliantly as a primary vocal microphone, is excellent for acoustic guitars and string instruments thanks to its ability to capture nuances, and delivers outstanding results as drum overheads or for room miking.
In short, the FET-17 is a versatile, musical, and detailed microphone—a Greenbox design developed for those who demand professional recording quality, high performance, and a refined sonic signature.
| Polar Pattern | Cardioid |
| Capsule | Large Diaphragm Condenser (34 mm) — RK-87 |
| Frequency Range | 20 Hz – 20 kHz |
| Sensitivity | -24 dB @ 1 kHz |
| Equivalent Noise (A-Weighted) | 14 dBA |
| Output Impedance | 200 Ω @ 1 kHz (aprox.) |
| Max. Output Voltage | -1 dBu |
| Current | 3 mA (máx.) |
| SPL (1% THD @ 1 kHz) | 138 dB |
| CMRR | >115 dB @ 60 Hz / >115 dB @ 1 kHz |