The USM 69 i has two built-in rotary switches. The five polar patterns of both capsules can be selected at the microphone itself. Therefore, no special AC power-supply units or powering adapters are necessary. The two outputs attach directly to any 48V phantom-powered connectors. In addition to the usual polar patterns (omnidirectional, cardioid, and figure-8), this microphone has a hypercardioid and a wide-angle cardioid pattern. A built-in DC converter generates the required capsule-polarizing voltages.
The microphone consists of the amplifier section and the capsule head. The amplifier section contains two microphone amplifiers operating independently from each other. They have an extremely low self-noise. Two completely separate microphone capsules are positioned closely above each other within the capsule head. Their diaphragms are made out of gold-sputtered polyester film. The upper capsule rotates against the lower one over a range of 270°. Color markings on the lower capsule system help to identify the angle by which the upper capsule has been rotated.
- Dual-Capsule Stereo Design
- Dual-Amplifier Stages
- Variable Stereo Patterns
- Customize Each Capsule Pattern
|Frequency Range||20 Hz to 20 kHz|
|Signal to Noise Ratio||70 dB CCIR|
|81 dB A-Weighted|
|Equivalent Noise Level||24 dB CCIR|
|13 dB A-Weighted|
|Maximum SPL||132 dB SPL 0.5%|
|Sensitivity||13 mV/PA @ 1 kHz into 1 kOhms|
|Power Requirements||48 V+/- 4 V|