Sennheiser HD205

The most common cause of distorted or intermittent sound is a damaged or frayed audio cord. Inspect the cable carefully for any visible cuts, bends, or exposed wires near the plug or earcup.

Try using another pair of headphones on the same device to determine whether the issue comes from the headphone jack or the HD205 cable.

If the second pair works fine, the HD205’s cord is likely faulty. Replace the cable or have it professionally repaired to restore proper sound quality.

If testing another headset on your device produces clear sound, the problem may lie within the speaker drivers of your Sennheiser HD205.
Drivers can become damaged from excessive volume, moisture exposure, or physical shock. Examine the earcups for signs of water damage or debris buildup.

If either driver is no longer functioning properly, the only permanent fix is to replace the headphones entirely, as internal speaker driver repairs are rarely practical for this model.