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Weird situation with our speakers

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4 replies

by stevefacer 2 views

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When we do not have any headphones plugged into the computers, the sound works just fine. When we plug headphones into either the main speaker, or the headphone port on the computer, it kills the sound. We are working with Dell Optiplex 745's and the main speaker is attached to our flat panel monitors. Any help or suggestions as how to fix this??

4 replies

by skdtech

Does sound come out of the headphones at all?
Have you tried using different headphones or using the headphones on a different device?

by thechas

Okay, I'll go with the flow.

Silly question #3, are these headphones or headsets that you are plugging in?

Most headphone jacks are designed with a switch that disables the speakers when you plug in the headphones.

If there is no sound out of the headphones themselves when they are plugged in, it could be for several different reasons.

A headset could short out a channel across the microphone line.

A 4 wire headset could short out both channels when plugged into a 3 wire jack.

Your headphones could have too low an impedance for the headphone circuit and thus have very low or no output.

There is a possibility that the switch portion of the headphone jack is connected but not the audio line. Or that the mic in and headphone out wires are crossed.

It would not hurt to check the mixer settings and make sure that there is not a separate headphone volume setting.

Chas

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