The Gold Series Advantage is the balance achieved between comfort, noise attenuation and purity of sound. No compromises. No excuses. Natural replication of amplified sound.Real audiophiles understand that for purity of sound an analog sound system is superior to a digital sound system, however, digital systems can correct imperfections or enhance and modify sound better than analog systems. Most active hearing protectors or stereo headphones employ one technology or the other. The engineers at Pro-Ears were not willing to compromise for the sake of simplicity or cost. The result is the hybrid digital/analog system found exclusively in the Gold Series active hearing protectors. Clear sound, clear commands, real advantage.