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Knowledge Base > Accessories > I/O Expansion Cards > 4 Channel Analog Input Card
Are all inputs on the 4 Channel Analog Input Card mic or line switchable?
Yes, all analog inputs are mic or line switchable.
Will phantom power damage my non-condenser microphones?
Generally no, some older ribbon microphones are somewhat susceptible, but it’s always a safe bet to disable phantom power when not needed.
Does the 4 Channel Analog Input Card have 48v phantom power on the inputs?
Does the 4 Channel Analog Input Card have the same mic pre as the Radius 12x8 and Radius AEC?
Yes, the same input circuit is used for all SymNet Composer hardware.
Where can I find AutoCAD files for EDGE and the Symetrix audio I/O cards?
Does the SymNet Analog Input Card have full 48 v phantom power on all inputs?
Yes, all SymNet card inputs (analog or AEC) have full 48 v phantom power.
What if I order an Edge or Radius AEC Frame but do not fill up the card slots?
Filler panels will reside in the empty slots.
What is Phantom Power?
Phantom power derives its name from its invisibility to audio signals, even though the microphone cable carries both phantom power (as direct current) and audio signals (as alternating current). Specifically, the term phantom power means a positive DC voltage sent to the microphone on both audio leads, through current-limiting resistors which also serve to isolate the audio leads from one another. The front panel phantom power button applies phantom power via pins 2 and 3 of the mic input XLR connectors.
Do the inputs of the 4 Channel Analog Input Card need to be padded to receive the output of a mixer or console?