Silent Base 600 Window be quiet! Silent Base 600 Window offers the perfect symbiosis of noise prevention cooling performance a good usability and an extensive capacity for high-end hardware. Excellent Cooling Efficiency Meticulous air circulation design provides outstanding airflow control that improves cooling while reducing noise-causing turbulence leading to truly excellent cooling performance. Whisper-quiet Operation Well-known whisper-quiet operation through two pre-installed Pure Wings 2 fans sound insulated material and anti-vibration mounting elements. Innovative Design Side panel with double-glazed window made from scratch and impact resistant material offers a superb sound insulation..