Many planar magnetic headphones have large balance deviations between the left and right channels, and accurate stereo reproduction is contingent on having a very close match between the left and right channels. During the OPPO PM-2’s manufacturing process, drivers are closely matched to ensure optimum stereo imaging and soundstage.
OPPO’s planar magnetic driver has a flat conductor pattern that does not have any inductive components. This eliminates inductance related intermodulation distortion, which is especially common in dynamic drivers with high impedance and a high number of voice coil turns.
An FEM-optimized magnet system with very high energy Neodymium magnets is used to maximize sensitivity and consistency of the applied force over the driver area.
When sound enters our ear, it has a planar wave front with all spectrum components in phase. A typical dynamic headphone driver disrupts this coherence with its phase irregularity, resulting in less than perfect signal peak reconstructions. OPPO’s planar magnetic driver has much better phase coherency since all parts of the diaphragm are vibrating in concert without break up and delayed resonance.
The diaphragm utilizes a spiraling pattern of flat aluminum conductors on either side of the driver. The double-sided design allows twice as many conductors to be placed within the magnetic field, which leads to higher sensitivity, better damping, and even drive force.
OPPO’s planar magnetic driver diaphragm has 7 layers of thin materials that provide excellent performance, reliability, and longevity. The construction of the diaphragm ensures that it is very stable under thermal stress and vibration.
Many planar magnetic headphones have a sensitivity far below 100 dB and require very powerful amplifiers to drive. The OPPO PM-2 has a sensitivity of 102 dB, which allows it to pair well with both mobile devices and scale upwards when used with high end headphone amplifiers.
The OPPO PM-2 is ruggedly constructed with an emphasis on long term use and maximum consistency from unit to unit. The headphones have been tested to very high standards to withstand mechanical and environmental stress in order to guarantee exceptional performance throughout its lifespan.
Many planar magnetic headphones weigh over 500 g and are often viewed as being uncomfortable. With a weight of 385 g, the OPPO PM-2 strikes a delicate balance between weight, comfort, and elegant industrial design.
The OPPO PM-2’s ear cushions are made out of the highest quality natural latex, which is superior to and longer lasting than any chemically formulated foam. It is naturally hypoallergenic, retains its mechanical spring-like properties for much longer periods, and resists moisture build up from sweating. The headband and earpads are made of carefully selected synthetic leather material.
The OPPO PM-2’s earpads are mounted on rubber inserts that can be easily cleaned or replaced. This design maintains compatibility with the PM-1’s earpads and makes trying out the PM-1’s lambskin and velour earpads nearly effortless. The headphone cable is detachable and uses 2.5 mm mono mini jacks to connect to the earcups, making it easy to switch between the longer, 6.35 mm terminated cable for home use, and a shorter, 3.5 mm terminated cable for portable use.
The 6.35 mm terminated headphone cable features Oxygen Free Copper (OFC) construction wrapped in a black fabric sleeve. A slimline selvedge denim carrying case is also included to allow for easy transportation on the go.
The selvedge denim carrying case included with your OPPO headphones is manufactured using vintage shuttle looms by a supplier for a number of boutique clothing brands based in Europe and Japan. The material is a stylish, high-end fabric that is prized for its ability to weather the elements and develop a unique aesthetic character over time, and the slim design of the case is a perfect match with the PM-2’s ability to fold flat, allowing the headphones to fit easily within a backpack or briefcase.
Acoustic Principle
Ear Coupling
Nominal Impedance
Sensitivity
Clamping Pressure
Cables
Cable Connectors
Weight
Included Accessories
Driver Type
Driver Size (Oval)
Magnet System
Frequency Response In Free-Field
Long-Term Max Input Power
Pulse Max Input Power
