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Headphone Jack

The Power Mac G4 has a 3.5 mm mini jack for stereo sound output on the back of the enclosure. The headphone jack is suitable for connecting a pair of headphones or amplified external speakers.

By using the Sound Control Panel, the user can choose whether to disconnect the internal speaker and the Apple speakers when a plug is inserted into the headphone jack.

The sound output through the headphone jack has the following electrical characteristics:

• output level 2.0 V peak-to-peak (0.7 V RMS)

• impedance suitable for driving standard 32-ohm headphones

• signal-to-noise (SNR) 90 dB unweighted (typical)

• total harmonic distortion (THD) 0.03% or less