Both "The Amethyst" models are based on our own original true electrostatic capsules. Large size diaphragms are made of the highest quality 6-micron Mylar film. Using our original technology the diaphragms are tensioned and adjusted on precisely made brass backplates. The diaphragms are sputtered with our special formula of gold mixture. It gives them faster impulse transient response without sound coloration, low frequency reduction, and adds possibility to handle louder sound pressure levels. At the end of the manufacturing process each capsule is carefully checked for all parameters and measured in an anechoic chamber for optimum of performance.Unidirectional cardioid polar pattern is reducing ambient studio noise. Both microphone models have minimal proximity effect and are working close to linear over the wide frontal incidence angle. The microphones headgrill is made as acoustic filter of multilayer brass mesh that reduces plosive sounds, breath, pop and wind noises, minimizes internal resonance effects, but keeps high frequencies and sound transparency unaffected. Additional metal mesh studio pop filter and polyurethane open cell foam windscreen is available as option. The internal solid state preamplifier of the microphone is based on class-A fully discrete transformerless electronics circuit, built using only the best quality selected components. The circuit is designed under the highest audio standards and provides linear audio frequency range, high dynamics, low self-noise, and very low audio distortion of all types. "The Amethyst" requires quality and stable 48 V phantom power. It is available from external microphone preamplifier and mixing console inputs or from separate phantom power supply units, but some units, though rated as 48 volt sources, may supply inadequate or unstable phantom power, which can result in distortion and degraded performance. Please check your phantom power source under real microphone load. "The Amethyst" is ready for direct mounting on the standard microphone stand. Rugged microphone construction and two internal shockmounts, separately for the capsule and for the electronics, effectively reduces stand rumble, outside infrasonic interference and mechanical shocks. The additional external elastic studio shockmount is available as option. We recommend to use our audiophile quality microphone cables with gold plated contact connectors to minimize external noise, signal loss and maximize contact quality. The cables are available as option. Under the special order "The Amethyst" microphones are available in matched stereo pairs to provide balanced stereo recordings.
Features:
Transducer type: electrostatic
Operating principle: pressure gradient
The diaphragms active diameter: 25 mm (1")
Frequency range: 20 Hz to 20 kHz
Polar pattern: unidirectional, cardioid
Output impedancel: 50 ohms
Rated load impedance: 1000 ohms
Suggested load impedance: > 500 ohms
Sensitivity at 1000 Hz into 1000 ohms load: 21 mV/Pa
S/N Ratio CCIR 468-3 weighted: 76 dB
S/N Ratio DIN/IEC 651 A-weighted: 87 db-A
Equivalent noise level DIN/IEC A-weighted: 7 dB-A
Maximum SPL for 0.5% THD at 1000 ohm load: 134 dB
Dynamic range of the microphone preamplifier: 127 db
Phantom powering voltage on pins 2 & 3 of XLR: +48 V (+/-4 V)
Current consumption: < 2 mA
Output connector: 3-pin XLR male, gold plated contacts
Signal polarity: positive toward pressure on a diaphragm produces positive polarity voltage on XLR pin #2 relatively to pin #3
Dimensions and weight: 168 x 63 x 41 mm, 350 grams
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