Last friday I bought a pair of Oppo PM-3 headphones and I've been listening to them extensively this weekend. For those who may not know, the Oppo PM-3 is a planar magnetic over-the-ear headphone. Though I am overal very pleased with their sound, looks and portability there is one major flaw that keeps me from being completely satisfied: there is a slight but clearly audible 'clicking sound'.
It's present solely in the rightern earcup and can be heard whenever I turn or nod my head, move my jaw or ever so gently touch the exterior of said earcup. This clicking is audible even when no source is connected. No such clicking is heard in the left earcup, which is where the audio-jack is located (generally the cause of problems, but not this time as it seems). The sound is most apparant whenever I'm walking around with these (portable) headphones and hear this click with every step I take, or when I unintentionally playback to a song
. The shape and size of my ears are normal and do not touch the insides of the headphone.
The 'clicking' can be described as a very short, sharp but not particulary loud sound that reminds me a bit of velcro. It sounds a bit like the noise you sometimes hear whilst plugging in a headphone into a source (brief static).
I have trouble tracing back the source of this 'clicking sound'. I first looked whether there may be a hair sticking into the drivers, but this was not the case. Then I fiddled a little bit with the wire that enters the rightern ear-cup but this did not produce the 'clicking sound'. Next up I checked the metal hinges, which look and feel really solid. But these do not seem to produce this noise either.
Coincidentally, when I last night put on some glasses, the clicking sound completely dissapeared, even when walking around. So unless these glasses had some magical power, the problem seems to be related to the seal of the headphones. Maybe it's the flexing of the drivers due to the pressure within the ear-cup, a problem I experienced earlier with some IEM's. But I am not sure if larger headphones also experience these kind of issues.
Anyone experienced similar problems with the pm-3?
(Returning is an option, but this was the last one they had in stock and this was the only respectable shop I could find that had these offered as a black-friday deal, and I really like them...)