ID: 34824
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The VSM-1, aka VSM, was a fixed-cardioid condenser microphone with a large-diameter capsule and a hybrid tube/solid-state amplifier circuit described at the time as servo-valve technology. It produced a sound described by reviewers as translucent and uncolored.
The input stage used a 12AX7 tube and a differential amplifier, reported by SOS to be a Burr Brown OPA2107 high-speed dual operational amplifier. A similar output circuit can be found in CADs Equitek series of microphones.
The mics capsule was CADs Optema design: a large-diaphragm, center-terminated, dual-diaphragm design with 3-micron, gold-sputtered membranes. Optema capsules were built in the US and tensioned and tuned by hand prior to installation. The diaphragms measured 28mm; the outside diameter of the capsule assembly measured 34mm.
The VSM comes with a shockmount, dual-voltage (117/220V) tube power supply, and a 30' cable in a locking black plastic flight case. The case was designed to hold the mic in its shockmount, facilitating setup and teardown.
The VSM-1, aka VSM, was a fixed-cardioid condenser microphone with a large-diameter capsule and a hybrid tube/solid-state amplifier circuit described at the time as servo-valve technology. It produced a sound described by reviewers as translucent and uncolored.
The input stage used a 12AX7 tube and a differential amplifier, reported by SOS to be a Burr Brown OPA2107 high-speed dual operational amplifier. A similar output circuit can be found in CADs Equitek series of microphones.
The mics capsule was CADs Optema design: a large-diaphragm, center-terminated, dual-diaphragm design with 3-micron, gold-sputtered membranes. Optema capsules were built in the US and tensioned and tuned by hand prior to installation. The diaphragms measured 28mm; the outside diameter of the capsule assembly measured 34mm.
The VSM comes with a shockmount, dual-voltage (117/220V) tube power supply, and a 30' cable in a locking black plastic flight case. The case was designed to hold the mic in its shockmount, facilitating setup and teardown.