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Sound Input Jack

The Power Mac G4 has a stereo sound input jack on the back of the enclosure for connecting an external PlainTalk microphone or a line-level sound source. The sound input jack accepts a standard 3.5 mm stereophonic phone plug (two signals plus ground).

The sound input jack has the following electrical characteristics:

• input impedance: 20 k

• maximum input level without distortion: 2.5 V peak to peak (Vpp) maximum

• line-level microphone voltage range of 0.28 V to 2.1 V peak to peak

• input SNR <90 dB unweighted (typical) for recording to system hard disk drive or system main memory