Dst 114 light Absoption Panel

It stands for High Fedility, which indicates “the fidelity and honesty of audio systems to play the clearest sound when transmitting audio pulses.”
In general, devices that support hi-fi have low noise and distortion (sound distortion) and are able to transmit so-called colorless sounds with a fast frequency response.

Many sound engineers and composers believe that adjusting the volume to achieve the best possible state can take many forms.Everyone has a different listening taste that the sound engineer should try to get the best output from by standard adjustment and proper tuning of the sound. Many people think that the more expensive the system they use, the higher the sound quality will be. But the truth is that a true audiophile cares more about the details of the sound and how the audio signals are output than about its power. Those who listen to music professionally do not want to make a lot of noise and listen to music at high volumes and enjoy music at medium and low volumes.

Special Weight(kg/m3):31.2
Penetration hardness index(N):105
Tensile strength(K/pa):88.6
Elongation to rupture(%): 142.5
Penetration hardness drop(%):30.88
ignition speed(mm/min):97.1
Scratch resistance(%):5
Washable: through the air sprayer
fire class: F
NRC Polyurethane foam : 0.6
The degree of reversibility(%):95
Compression resistance(%):99