I have a better version of these headphones I'd like to show you. Putting the earphone further away from your ear results in a more transparent sound, which is why I tried using softer rings, but this is not the answer. Traveler's Carpet. There is no way to identify the noise. The top became airy and clear, and the upper bass was completely absent. For the evaluation, I listened to music by Jacques Loussier and Encore! on a NAD source through a Cambridge Azur640 amplifier.
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