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Phantom Power should be disengaged when connecting or disconnecting microphones to prevent possible damage to the microphone's internal electronics or the MicroTrack. The phantom power switch on the MicroTrack 24/96 is labled Ph PWR; and on the MicroTrack II it's labeled +48V.
This is a general rule that applies to any device of any brand that provides Phantom Power on a TRS connector.
Furthermore, XLR to TRS (Tip-Ring-Sleeve), pictured below, cables are required when using the MicroTrack with Phantom Powered microphones.
Note the 2 rings dividing the 1/4" connector in the 3 sections; the Tip, Ring, and Sleeve (TRS).
Using an XLR to TS (Tip-Sleeve) cable may damage the microphone's internal electronics or the MicroTrack!
Here is why:
Phantom Powered Microphones operate using 3 connections:
1. Ground (XLR Pin 1 or TRS-Sleeve)
2. Signal and phantom power (XLR Pin 2 or TRS-Tip)
3. Phase inverted signal and phantom power (XLR Pin 3 or TRS-Ring)
When using a cable with a Tip-Sleeve connector, the TRS jack on the MicroTrack will apply both, ground AND a power charge to the sleeve of the cable. Or in other words, there will be a short - this may damage the microphone or the MicroTrack.
The same applies when connecting- or disconnecting a TRS cable while phantom power is active on the MicroTrack - the Tip- and/or Ring of the TRS connector may touch the sleeve contact of the jack as they pass by it. This may create a short and can therefore potentially damage the Microphone or the MicroTrack.