Advanced Audio Microphones CM-414
Multi-Pattern Condenser Microphone
The CM-414 is a 3-pattern FET condenser with a transformer-coupled output circuit.
Dave Thomas describes the circuit as a reproduction of the circuit in the AKG C 414 EB. It is a two-stage design, using two transistors. The second stage transistor lowers the impedance enough that the output transformer has a ratio of just 2:1, which causes less gain loss than would a higher-ratio transformer. According to Thomas, the result is that the 414EB circuit has twice the headroom of the U87 circuit.
The CM-414 is housed in a tapered cylindrical body. Three switches beneath the headbasket allow selection of three polar patterns (Cardioid, Omni, Figure-8), a -10dB pad, and a high-pass filter.
The mic ships with shockmount and aluminum road case.
The Advanced Audio Microphones CM-414 is also known as: CM414.
|Pickup Patterns||Pads & Filters|
(25 - 20,000 Hz)
Cardioid (25 - 20,000 Hz)
Bidirectional (25 - 20,000 Hz)
| Diaphragm diameter: 27.8mm
Capsule diameter: 34.4mm
Diaphragm gauge: 6 microns
|200 Ohms (Low)||Max SPL: 135 dB
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