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I am trying to repair a headphone cable with a splice. The audio sounds really bad after the repair. I can hear instruments, but not the vocals. Also, the playback is mono, same sound on both sides.

If I short Left to Right, the audio gets quiet, but still sounds bad. If I short Left to Common, or Right to Common, the sound quality returns to normal, but audio playback is still mono. Does this mean there is a open connection on common, and a short between Left and Right? Or is some other fault possible?

pipe
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flyoffacliff
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2 Answers2

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What you describe could be explained with simply an open common, assuming that you channel to common short test is before the open, i. e. at the source.

With the open common, you have the phones in series with the ends connected between L and R. You are hearing the difference between the channels. This cancels out "centered" sound.

By shorting common to Left, at the source, you'd end up with the phones in series between Right and common. You'd hear only Right, being fed to both sides, though out of phase between sides.

DoxyLover
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This matches the case of the missing common ground so that common mode gets nulled by the differential between Left and right.

Fix the missing ground.

Tony Stewart EE75
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