SYNKRON REVIEW PATCH
SYNKRON REVIEW PLUS
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SYNKRON REVIEW PLUS

The front of the microphone is indicated by the colored dot at the bottom of the screen.įrequency Response: The on-axis frequency response of the AU-7a is linear plus or minus 2.5 dB from 30 to 18,000 cycles per second. The sum total of these characteristics results in the familiar cardioid response, having a front to back ratio of 20 dB. There are acoustical phase shifts between the diaphragms, causing the element to be half pressure responsive and half pressure gradient responsive.

Only one of these is electrically connected. The generating element uses two aluminized Mylar diaphragms. The 10 dyne/cm² sound pressure level is the standard used for rating most low-impedance microphones, and is roughly equivalent to the average sound level of a symphony orchestra as heard from front row center.ĭirectional Characteristics: The AU-7a has cardioid pickup patterns as shown above in Figure 2. Output Level: The output of the microphone when subjected to a 1,000 cycle sound pressure level of 10 dynes/cm², and with the microphone terminated in a non-inductive, resistive load equal to its rated impedance is −50 dBm. Here is your Model AU-7a condenser microphone, an American-made product of the highest quality, the first microphone to successfully employ the Field Effect Transistor.

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These mics are not for sale.)Įxcerpted from the Syncron AU-7a booklet, which is available for download below: Price: $169.50 (Price shown for historical purposes only.Distortion: Less than 0.5% at 100 dyne/cm².Output Level: −45 dBm (referred to 10 dyne/cm²).Directional Characteristics: Cardioid, 20-dB front-to-back ratio.Built-in swivel permits tilting through 130 degrees. The multi-pin connector is also designed to provide for an auxiliary power supply for continuous operation. There is no possibility of leaving it on when not in use. The AU-7a connector is multi-pinned, and functions as a switch to turn the microphone on and off.

SYNKRON REVIEW PATCH

The balanced output of 50 or 200 ohms is easily interchangeable by means of miniature patch cords with gold-plated plugs. Low noise and distortion plus high output level give maximum sensitivity and outstanding clarity of sound. The entire amplifier module is potted in silicone rubber to protect the components against shock and moisture. Single transistor amplifier, built with missile-grade components, assures high reliability in the field. Rugged Mylar diaphragm provides smooth frequency response with total absence of annoying peaks. Cardioid pattern, offering a front-to-back ratio of better than 20 dB, makes the AU-7a well suited to difficult sound pick-up tasks including high-quality public address systems. Over 2500 hours of battery life through the use of standard, low-cost Mallory mercury cells. This is the first really self-contained condenser microphone (no awkward power supply to contend with). The following text is from the Syncron Corporation AU-7a marketing and specification sheet, which is downloadable below. Plus information on the Fairchild F/22 and the Syncron S-10

Synkron review