EASY !!!! In most cases, it is the speaker that is the problem !!! Easy to change: 1. 2 screws inside the earcups and the cloth piece (The earcups are "clips" on plce...use your finger all the way around until you hear click....every 2 cm.....) 2. Use a scalpel to open the cover of the speaker (NB!! warm up a bit first...hair dryer works fine!) 3.Unsolder the speaker and solder a new one !! EVERYTHING OK !!!

EASY !! In most cases, it is the speaker that is the problem !!! Easy to change: 1. 2 screws inside the earcups and the cloth piece (The earcups are "clips" on plce...use your finger all the way around until you hear click....every 2 cm.....) 2. Use a scalpel to open the cover of the speaker (NB!! warm up a bit first...hair dryer works fine!) 3.Unsolder the speaker and solder a new one !! EVERYTHING OK !!!

EASY !!! NO SOUND IN A SPEAKER, BOSE QC 15-25: In most cases, it is the speaker that is the problem !!! Easy to change: 1. 2 screws inside the earcups and the cloth piece (The earcups are "clips" on place...use your finger all the way around until you here click....every 2 cm.....) Begin the repair by removing the ear cushion. The pad is held in place by some small plastic clips. Carefully pry with plastic opening tool or nails. 2. Use a scalpel to open the cover of the speaker (NB!! warm up a bit first...hair dryer works fine!) 3.Unsolder the speaker and solder a new one !!