Gauge Microphones ECM-47
Multi-Pattern Tube Condenser Microphone
The ECM-47 is a large-diaphragm multipattern tube microphone. It is described as having “the warmth of a tube 47 and the presence peak of a C12.”
The mic has a 35mm capsule, with dual 6-micron diaphragms. A switch on the external power supply allows selection of any of 9 pickup patterns, from omni to figure-of-8. The manual warns that “whenever the polar pattern is changed, please allow at least 3-minutes for the change to take full effect.”
The amplifier circuit uses a 6072 vacuum tube and has a transformer-coupled output. The transformer is a dual-bobbin design with a 6.5:1 ratio. (The Neumann BV8 transformer in the U-47 had the same ratio.)
The Gauge quality control program requires that:
- Tubes are tested for gain and noise prior to assembly; if more than 1 in 20 tubes fails, the entire shipment is rejected.
- Capsules are manufactured to higher tolerances than for low-priced mics.
- Mics are burned in for 48 hours prior to shipping from the factory.
- Each mic is individually auditioned in California by Gauge staffmembers.
The ECM-47 ships in a hardwood case with a pop filter, elastic shockmount, tube power supply and power cable, in a flight case.
Permalink: Gauge Microphones ECM-47
The mic was released in 2009.
|Frequency Response - OmnidirectionalClick Graph to Compare!|
|Frequency Response - CardioidClick Graph to Compare!|
|Frequency Response - BidirectionalClick Graph to Compare!|
|Pickup Patterns||Pads & Filters|
(16 mV/Pa; 20 - 20,000 Hz)
Cardioid (16 mV/Pa; 20 - 20,000 Hz)
Bidirectional (16 mV/Pa; 20 - 20,000 Hz)
| Capsule diameter: 35mm
Diaphragm gauge: 6 microns
|200 Ohms (Low)||Max SPL: 135 dB
Self-noise: 18.0 dB(A)
Did we get anything wrong on this page? Please let us know!