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Core Sound OctoMic™
OctoMic Specifications

(Last updated 03/19/2018)

Specifications (see Note 1)

  • Microphone Type: 2nd-order ambisonic for VR, surround, stereo
  • Raw capsule information:
    • Number: eight
    • Medium-sized diaphragm: 12 mm diameter
    • Pattern: cardioid
    • Type: electret condensor
  • OctoMic pattern: variable, multiple simultaneously, selected at decode
  • Capsule ordering and channel assigment: OctoMic's "front" is indicated by the "Core" logo. Looking at the logo, the top/front capsule is #1. and the capsule to the lower right is #2. Above and to the right of capsule #2 is capsule #3.
    • Top ring of capsules: #1, #3, #5 and #7
    • Bottom ring of capsules: #2, #4, #6 and #8
  • Capsules tested, selected and matched into sets, with calibration data supplied for OctoMic A-to-B-format encoder plugin
  • Frequency response:
    • Raw: 40 Hz - 18.5 KHz +/- 4 dB
    • Calibrated: 30 Hz - 18.5 KHz +/- 2 dB
  • Self noise (complete array): 15 dBA
  • Phase: non-inverting
  • Maximum SPL per capsule: 135 dB
  • Sensitivity per capsule: 7.0 mV/Pa nominal (-43 dB ref: 1V/Pa)
  • PPAc8 output impedance: 85 Ohms
  • PPAc8 signal run distance: greater than 500 feet
  • Output connector:
    • compatible with Neutrik MRF12 (mates with Neutrik MSCM12)
    • breaks out to eight XLR-M plugs via PPAc8 system
  • Power:
    • 48 Volt Phantom Power with PPAc8 Phantom Power Adapter)
    • approximately 16 mA @ 48 VDC total (2.0 mA per capsule)
    • If 48V is not available, PPAc8 can be powered by an external battery pack or power supply: 9 to 12 VDC, DC power connector: 4.0mm x 1.7mm, center pin +. An alkaline 9 Volt MN1604 "transistor radio" battery lasts 25 hours or more.
  • Shaft diameter: .70 inch (17.7 mm)
  • Overall length: 5 inches (12.7 cm)
  • Weight: 5.3 ounces (150 grams)
  • Re-calibration interval: 3 years (general usage), 2 years (precision acoustic measurements)

Note 1: Using OctoMic with 48V phantom power adapters other than those provided by Core Sound will void all performance specifications.

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For pre-sales consulting or to place an order, call Core Sound at 1.888.538.6744 or 1.201.801.0812.

"Core Sound Microphones" is a trademark of Core Sound, LLC
"Core Sound" is a trademark of Core Sound, LLC
"PDAudio", "TetraMic", "HeadLine", "2Phant" and 4Mic are trademarks of Core Sound, LLC
Thanks to HK Audio for use of their open-air concert photo. Mossman photo ©2004 OceanBridge Communcations.
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