Stability, Consistency, Reliability During the OPPO PM-3's manufacturing process, the left and right drivers are closely matched to ensure optimum stereo imaging and soundstage. Unique Planar Magnetic Sound Utilising planar magnetic drivers derived from the award-winning PM-1 headphones, the PM-3 features deep bass, smooth midrange, and clear treble. The sound signature can be described as very natural and balanced, with plenty of emotion and impact. Urban Style OPPO PM-3 is designed as a soft, dedicated, moving listening room in one's urban life. Fem-Optimised Magnet System Maximises sensitivity and consistency of the applied force over the driver area. Double-sided Spiralling Coils Allows twice as many conductors to be placed within the magnetic field, which leads to higher sensitivity, better damping, and even drive force. Seven-Layer Diaphragm Ensures that it is very stable under thermal stress and vibration Purely Resistive Impedance OPPO's planar magnetic driver has a flat conductor pattern that does not have any inductive components. This eliminates inductance related inter-modulation distortion, which is especially common in dynamic drivers with high impedance and a high number of voice coil turns. Optimised for Mobile Use The OPPO PM-3 has a sensitivity of 102 dB, which allows it to be easily driven with mobile devices. PM-3 provides isolation from the outside world, blocking out the surrounding noise. Unparalleled Comfort As one of the lightest closed-back planar magnetic headphone, PM-3 is a joy to listen for hours on end due to its 320g weight, plush padding and carefully calibrated clamping force. Material and Build Quality The OPPO PM-3 is ruggedly constructed with strong metal and plush padding materials. The headphones have been tested to very high standards to withstand mechanical and environmental stress in order to guarantee exceptional performance throughout its lifespan. In-line Mic and Remote The PM-3 is shipped with a 3 meter main cable and your choice of a 1.2 meter portable cable for iPhone®, Android®/Windows phones®, or without mic & control.