Preliminary Specifications

• Microphone Type: tetrahedral, single-point Ambisonics surround sound
• Raw capsule information:
  • Number: four
  • Medium-sized diaphragm: ~12 mm
  • Pattern: cardioid
  • Type: electret condensor
• TetraMic pattern: variable, selected at decode
• Capsule ordering and channel assigment (the "front" of TetraMic is indicated by the "Core" logo):
  • Channel 1: LFU (left/front/up)
  • Channel 2: RFD (right/front/down
  • Channel 3: LBD (left/back/down
  • Channel 4: RBU (right/back/up)
• Capsules tested, selected and matched into sets, with calibration data supplied to "VVMic for TetraMic" decode software
• Frequency response:
  • Raw: 40 Hz - 18.5 KHz +/- 4 dB
  • Corrected: 30 Hz - 18.5 KHz +/- 2 dB
• Self noise: 19 dBA per capsule
• Phase: inverting when used with Core Sound PPA; non-inverting with 4Mic
• Maximum SPL per capsule: 135 dB
• Sensitivity per capsule: 14 mV/Pa
• Output connector:
  • compatible with Switchcraft TB6M (mates with TA6F)
  • breaks out via breakout cable to four 3-pin mini-XLR plugs (P3), compatible with Switchcraft TA3F
• Power:
  • 4.5 to 6 VDC into breakout cable's 3-Pin mini-XLR plugs
  • 48 Volt Phantom Power with optional PPA (Phantom Power Adapter, compatible with Audio Technica AT8531 Power Module and many others)
  • approximately 15 mA @ 48 VDC total (3.5 mA per capsule) when using PPA

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