Hi John, I don't know how much residual noise is 'normally' present on a KN2600, since I don't have that model. However, you could go back to your dealer, taking your headphones with you and ask to listen to another KN2600 - assuming he has one in stock If it appears much quieter then you may have a problem on your keyboard which should be corrected under guarantee.

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Willum
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)