This speaker contains PM4 technology:
The new PM4 diaphragm incorporates a new high-tech polymer never used in the audio field before.
It offers a stronger union between the dome and the coil support, and therefore better behavior in handling high power and long periods of work.
At the subjective level, which is also a relevant part of the development process at Beyma, in our opinion it offers a more natural sound when compared to other polyesters.
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