Stellar Sounds CM-4
Multi-Pattern Tube Condenser Microphone
The CM-4 was an early multipattern tube microphone from Stellar Sounds. Based on a Chinese bottle-style body, the mic was a three-pattern, large-diaphragm condenser with a transformer-coupled output.
The tube amplifier circuit was based on the 6J1 vacuum tube, described as “specially selected.” The 6J1 is a pentode, manufactured in China, is equivalent to the EF95 and 6AK5.
A switch on the front of the microphone body allowed selection of Cardioid, Omnidirectional, or Figure-8 polar patterns. Two switches on the rear optionally enable a high-pass filter or a -10dB pad.
Photo credit: Sacha Müller
Permalink: Stellar Sounds CM-4
|Pickup Patterns||Pads & Filters|
(14.1 mV/Pa; 20 - 20,000 Hz)
Cardioid (14.1 mV/Pa; 20 - 20,000 Hz)
Bidirectional (14.1 mV/Pa; 20 - 20,000 Hz)
| Diaphragm diameter: 27mm
Capsule diameter: 34mm
|200 Ohms (Low)||Max SPL: 148 dB
Self-noise: 18.0 dB(A)
|n/a||233mm (9.17'')||65mm (2.56'')||
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