Oppo PM-1 - Manual (Page 5)

3
OPPO PM-1 Planar Magnetic Headphones
Left Mark
Swivelling Ear cup
Unique
Serial
Number
Adjustable Headband
Replaceable
Ear pad
SN: XX0001
Congratulations! You are now the proud owner of a pair of
headphones resulting from many years of R&D led by a team of
passionate audio and acoustics engineers, material scientists,
chemical technologists and audiophiles.
The OPPO PM-1 utilises a planar magnetic driver that sets it apart
from the majority of headphones on the market. In our planar
magnetic headphones, sound is generated by a very thin and light
diaphragm whose entire surface area is evenly driven. The
diaphragm is driven in a symmetric pull-push manner, and the
magnetic system and conductor patterns have been optimised for
maximum sensitivity and consistency. This allows the diaphragm
to generate very stable and linear piston-like vibrations, ensuring
phase coherence and high resolution performance with minimal
distortion.