AKG K812 Superior Reference Headphones, The K812 superior reference headphones offer the most pure and natural sound possible. Designed for music professionals the K812 empower to experience the smallest sonic details with the most accurate balance for mixing, mastering as well as music production. The K812 transducer is the largest AKG has ever built. The 53 mm transducer was developed to push the boundaries, to get as close as possible to sonic perfection. During the development process, AKG developed the transducer from scratch in order to ensure the highest in-class headroom and dynamic range. With the strongest magnet system available on the market, the K812 provides the most precise and powerful experience possible. The 1.5 Tesla magnet system offers highly accurate imaging leading to pure, natural sound. The copper-covered aluminum voice coil extends sound beyond the limits of human auditory system, hitting a full spectrum of frequencies. With the ultra-lightweight two-layer voice coil a superior impulse response and an extended frequency range up to 54 kHz is guaranteed.