Damaged/Faulty Speakers rw6815

Ive had my 6815 a little under 2 months now and to be honest i havn't listened to an awful lot of music...iff any.

Ive noticed recently that the speakers sound distorted or commonly known as "farting" when the music is played.

This also happens when some notifications/alert tones are played,the speakers really struggle to play and sound awful.

Is this a common problem on this unit or any hp unit ?

No doubt ill be contacting HP about this for repair/replacment,just wanted to hear your thoughts/experiances.

Thanks

Chris.