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When I plug my speakers into a headphone jack on my iPhone, is the output stereo or mono?

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1 Answer 1

The iPhone headphone jacks are 1/8" (3.5mm) stereo jacks. If you have a stereo cable plugged in, the output will be stereo.

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Interesting side-note, the external speakers on the iPhone are 'mono', and I believe only output the left channel.. –  notthetup Apr 23 '11 at 17:49
@ntt On my iPhone, of the two holes on the bottom, the one on the right (if the screen is facing you) is a mono speaker and the one on the left is phone's primary microphone. –  Kalamane Aug 26 '11 at 16:10
Indeed.. But it takes the left channel of the audio to send to that mono speaker.. –  notthetup Aug 30 '11 at 7:49

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