20 Most Recent Koss Porta Pro Consumer Headphones Questions & Answers


Koss Porta Pro headphones have a lifetime warranty. If the cable is damaged, contact Koss directly. Good luck.

Koss Porta Pro... | Answered on Nov 06, 2017


you can not hear the sound

Koss Porta Pro... | Answered on Feb 21, 2011


I can't say it will help, but it might be worth taking a look at my newly posted tip on headphone cable and plug problems.

Koss Porta Pro... | Answered on Jan 10, 2011


Google (koss)(HG 911)(manual) without parens.

Koss Audio... | Answered on May 06, 2019


This could be an indication of power suply failure.

Koss Audio... | Answered on Feb 10, 2018


The player is no longer any good. Sorry.

Koss Audio... | Answered on Sep 08, 2017

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