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Core Sound TetraMic
TetraMic Usage

(Last updated 11/06/2016)


Getting a Copy of "VVMic for TetraMic", VST Plugins and Your Calibration Files

When you've received your TetraMic, please contact us. We'll send you a link to download "VVMic for TetraMic", VVTetraVST, VVMicVST and the calibration files for your specific TetraMic.

Which side of TetraMic is the front and which capsule is channel #1?

TetraMic's front side is indicated by the "Core" logo.

Viewed from the rear, channel number 1 is the capsule facing up on the logo side: that's the Left Front Up (LFU) capsule. Channel number 2 is the Right Front Down (RFD) capsule. Channel number 3 is the Left Back Down (LBD) capsule. And channel number 4 is the Right Back Up (RBU) capsule. The capsule ordering can also be found on the TetraMic Specifications page.


TetraMic's base houses a 6-pin mini-XLR-M jack. The six pins carry four unbalanced microphone signals, power and ground.

Cabling for the PPAc System

We recommend the PPAc system for almost all applications. It is very compact, converts the TetraMic's unbalanced audio signals to balanced ones, and allows a maximum separation between TetraMic and your recorder/soundcard of 800 feet or more. It is very immune to picking up electromagnetic noise and hum.

One end of a PPAc Adapter Cable connects to TetraMic and the other end to the PPAc Transmitter. Connect one end of a rugged shielded Ethercon cable (or a low-cost shielded CAT5e cable) to the PPAc Transmitter, and the other end to the PPAc Receiver. The PPAc receiver has four short cables coming out of it; each short cable terminates in a color-coded XLR-M plug. Plug those four XLR-M plugs into your recorder/soundcard.

Shielded Ethercon cables are, in general, much better shielded than shielded CAT5e cables, so if you are operating in a high RF interference situation we strongly recommend using shielded Ethercon cables.

TetraMic is normally powered by your recorder's or mic pre-amp's 48 Volt Phantom Power via the PPAc System. (The PPAc system can also be powered by an external battery pack - see the TetraMic accessories page for details.)

Microphone Pre-amplifiers and ADCs

Ideally, to preserve TetraMic's calibrated performance, all four TetraMic channels should be gain-matched to within 0.1 dB. To do that requires either mic pre-amps and A-to-D converters that are designed to hold those gain tolerances, or you have to invest the extra effort to calibrate your mic pre-amps and ADCs.

We've found that a few commercial mic pre/ADCs will do the job. They are the MOTU Traveler, MOTU 4Pre, Metric Halo's ULN-8, Prism Sound's Orpheus, Apogee's Quartet and RME Fireface UFX.

Other mic pre-amps/ADCs that may work are the Roland Octa-Capture and Quad-Capture, and the Steinberg UR-44.

The MOTU Traveler can be used as an excellent quality, low-cost, stand-alone mic pre-amp, in addition to its FireWire interface for PCs. Its Line level outputs can be connected to a Sound Device's 744T four-channel recorder's Line inputs to make fine sounding recordings. The MOTU 4Pre is similar, uses both Firewire and USB, costs less than the Traveler, and is easily powered by a battery for mobile use.

The excellent sounding Metric Halo ULN-8 can also be used as a stand-alone mic pre/ADC. Orpheus and Ensemble can also operate stand-alone once they have been configured with a computer.

Apogee's Ensemble Mobile is one of the few mic pre/ADCs that can easily be battery powered.

Care of the Shock Mount

The shock mount has a rubber suspension that requires a bit of care. Please twist TetraMic as you insert it into the shock mount and as you remove it. Don't push it straight in or pull it straight out, as it can tear.

Battery Power

When TetraMic is used with the PPAc system, it can be powered either by standard 48 Volt Phantom Power or a local DC battery that provides between 9 and 12 Volts DC. A single alkaline 9 Volt battery (type MN1604) will power TetraMic for approximately 5 hours.



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

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"Core Sound" is a trademark of Core Sound, LLC
"OctoMic", "TetraMic", "HeadLine" and "2Phant" 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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