Optema� Series, OS 110 Condenser Capsule
The VSM comes with an OS 110 series capsule that is manufactured in our capsule facility in Conneaut, Ohio. The OS 110 capsule features:
Large Diaphragm Condenser Tube Microphone
The VSM is a cardioid single tube true condenser microphone that features servovalve technology and the exclusive CAD Optema� OS 110 capsule. The VSM is a natural bridge between the valve technology developed for the VX2 microphone and the servo opamp technology developed for the Equitek series microphones. The head amp in the VSM microphone is a 12AX7 tube in a circuit that is optimized for maximum headroom and low noise. The output stage is a high speed dual opamp in a balanced differential configuration that allows long cables to be used without affecting microphone performance.
� True large diameter capsule with 1.1" inside diameter. (1.34" outside diameter.) � 3 Micron thick high tension, diaphragms made from the latest high strength polymer film. � 24K Gold sputtered diaphragm coating. � Each capsule is hand adjusted for proper damping and consistent frequency response. � Other capsule components made from precision machined brass and stainless steel.
Use and Operation
The VSM has extremely wide frequency response and dynamic range with a slight rising response characteristic at 15KHz. The VSM is ideal for both vocal and instrument recording applications. The VSM comes complete with an elastic suspension mount, heavy duty analog power supply, and a 30 foot professional 7 conductor cable.
Mount the microphone in the desired location. Plug the included seven pin cable into the microphone and the power supply. The output of the microphone is at the 3 pin XLR connector on the power supply. Use a standard balanced 3 pin XLR cable to connect the microphone output to the input of your mixer or recorder. Phantom power is not required. Plug the power supply into your AC mains supply. Turn the power supply on using the rocker switch on the right side of the front panel of the power supply. The LED on the rocker switch will light. Allow a few minutes for the vacuum tube in the microphone to warm-up and stabilize. The output level of the VSM is quite high. It is recommended that you start with trim control or input level control turned down on your mixer or recorder. It is also recommended that you turn down your input level whenever changing any of the switch settings on the microphone.
VSM Shock Mount
The VSM shock mount is an integral part of the VSM microphone and only needs to be removed to service the microphone. To remove the shock mount, unscrew the two knurled knobs on either side of the microphone and the knurled knob in the back of the microphone.
