In a PC, there are several sources of noise. Reducing speed and decoupling can assist in reducing these, but adding housing insulation can help with removing noise entirely.
Mod King are high quality mats produced in Germany, and are made from soft polyurethane acoustic foam, with a top cover of finely perforated leather material, which is resistant to dirt and can be wiped clean. The underside is self-adhesive.
Sound absorption is most effective at 1800 to 3500Hz. Between 1200 and 6000Hz are reduced also to an extent, and the high frequency sound of many fans will be reduced significantly.
This kit is pre-cut for the Lian Li PC-A77 case, and is customised to ensure a perfect fit. Material is included to cover all panels and even the fan slots if required.
Technical details: Suitable for: Lian Li PC-A77 (A / B), Big-Tower
Content (precision-fit mats for ...): 2x side (right / left)4x base (front / middle / rear)1x Front (5.25 "slots)3x rear (fan slots, vent)2x Cover