Microtech Gefell M300 is a small-diaphragm cardioid condenser microphone in a compact cylindrical body, hand-built in Gefell, Germany. The MK 301 S capsule — designed and manufactured exclusively by Gefell — is the core of the microphone: an 18.6 mm element with a gold-sputtered polymer membrane, drawing on the capsule heritage that traces back to Georg Neumann's founding years in Gefell. A transformerless output maintains self-noise at 14 dBA with a sensitivity of -40 dB (10 mV/Pa) and a maximum SPL of 142 dB. The compact dimensions (135 x 22 mm, 95 g) make the M300 unusually easy to position in tight spaces — drum overheads, piano, acoustic guitar, ensemble. The dark bronze finish distinguishes it visually from the satin nickel variant. Hand-built and individually measured in Germany.
MK 301 S capsule and transformerless electronics
The MK 301 S capsule is a Gefell design based on an 18.6 mm gold-sputtered polymer membrane — the small-diaphragm sibling of the capsule tradition from the Gefell facility, carrying forward the sonic philosophy of the company Georg Neumann founded in this town in 1928. The transformerless output circuit provides very low output impedance and minimizes phase distortion — relevant when summing stereo to mono or combining multiple microphones in complex setups. The frequency response from 40 Hz to 18 kHz carries a gentle presence rise around 7–12 kHz, adding natural clarity and openness without edginess. The polar pattern remains consistent and narrows appropriately at high frequencies — typical of a well-designed small-diaphragm cardioid, and particularly useful in close-mic multi-microphone configurations where mutual isolation is a priority. RFI susceptibility is very low. Internal elastic mounting of the capsule and electronics reduces mechanically transmitted vibration without a dedicated external spider.
Applications and position in the Gefell line
The M300 complements the large-diaphragm Gefell microphones in applications requiring precise positioning in small spaces or consistent multi-directional behavior in multi-microphone setups. Reviewers consistently note its natural, clean reproduction of acoustic guitar and acoustic instruments — without the exaggerated presence peaks typical of many competing small-diaphragm condensers. It pairs naturally with the M930 in complementary configurations: ribbon or LDC as the primary microphone, M300 as the close or spot microphone. The microphone ships with the MH 300 clip and a wooden case. Available in factory-matched stereo pairs for ORTF, X-Y, and Blumlein configurations.
KEY FEATURES
- Small-diaphragm cardioid condenser microphone, hand-built in Germany
- MK 301 S capsule: 18.6 mm, gold-sputtered polymer membrane — designed and built exclusively by Gefell
- Transformerless output — minimal phase distortion, low output impedance
- Self-noise: 14 dBA
- Maximum SPL: 142 dB at THD below 0.5%
- Sensitivity: -40 dB (10 mV/Pa)
- Frequency response: 40 Hz – 18 kHz
- Gentle 7–12 kHz presence rise — natural clarity without edginess
- Stable cardioid polar pattern, well-controlled high-frequency narrowing
- Very low RFI susceptibility
- Internal elastic mounting of capsule and electronics
- Compact dimensions 135 x 22 mm, 95 g — easy positioning in tight spaces
- Dark bronze finish
- Available in factory-matched stereo pairs
- Included: microphone, MH 300 clip, wooden case
- Power: 48V phantom
TECHNICAL SPECIFICATIONS
- Acoustic operating principle: condenser, transformerless
- Polar pattern: cardioid
- Capsule: MK 301 S, 18.6 mm, gold-sputtered polymer membrane
- Frequency response: 40 Hz – 18 kHz
- Sensitivity: -40 dB re. 1V/Pa (10 mV/Pa)
- Self-noise: 14 dBA (IEC 651)
- Maximum SPL: 142 dB at THD below 0.5%
- Output impedance: 50 ohms
- Recommended load impedance: 1,000 ohms minimum
- Power: 48V phantom (IEC 268-15)
- Dimensions: 135 mm (L) x 22 mm (diameter)
- Weight: 95 g
- Finish: dark bronze (alternative: satin nickel)
- Included: M300 microphone, MH 300 clip, wooden case
