Question about Koss PRO-4AA Consumer Headphones

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Left speaker doesn't work

I have a pair of KOSS Pro-4AA headphones and the left speaker, if that's what you call it, doesn't work. I opened the headphones up and i know that the wires are okay because the right speaker works and i connected it to the left side and it still works. Is there anyway to fix the left speaker or look for what might be wrong with it. If not is there some place i can order a replacement speaker without buying a new pair of headphones?

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Koss has a no questions asked guarantee on some of the Pro-4 series, all you pay is shipping. Call the repair department to check.

Posted on Aug 27, 2010

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Don't know how to hook them up


What a lovely daughter, how very nice of her,

here goes....straight for Mr. Koss

To Operate with AC Adapter
  1. Open battery compartment located at the back of both speakers and remove wires.
  2. Replace battery covers.
  3. Connect DUAL PLUG CONNECTOR on left speaker to right speaker at connection marked "TO LEFT SPEAKER."
  4. Connect remaining wire with 3.5mm plug to headphone jack on your audio source.
  5. Connect AC adapter (not included) to back of left speaker at connector marked "DC 6V." Plug remaining end of AC adapter into wall outlet. Be sure your AC adapter is built with the center pin as ("-") negative. Connect remaining wire with 3.5mm plug to the headphone jack on your audio source.
  6. Turn ON/OFF switch at back of right speaker to "ON."
  7. Set "INPUT SELECTOR" switch to audio source.
  8. Turn on audio source
  9. Adjust sound in the following ways: Turn volume control to desired level; push Bass Boost button located on right speaker to "ON" for added bass; push Treble Boost button on right speaker to "ON" for added treble
  10. Operating a microphone through your speakers require an additional 3.5mm plug to 3.5mm plug cable (included). Connect cable with 3.5mm straight plug to right speaker at input marked "MIC" on back of speaker. Plug the remaining 3.5mm L--plug into the mic input on audio source. Connect your microphone to the front of your speakers at "MIC" input (microphone not included)
Hope you have all of the skinny you need, good luck,
please leave a rating, thank you kindly

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Koss Pro-4AA


Don't bother, Koss has a lifetime replacement policy on some headphones like the Pro-4's. All you pay is shipping. Call the repair department.

Feb 25, 2008 | Koss PRO-4AA Consumer Headphones

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