Maximum shielding from outside interference
The Apollo DAC chassis has been designed from the outset to be an effective vibration-absorbing and mechanically extremely robust assembly. Special attention was paid to ensure maximum shielding from outside interference. The proprietary self-binding Inclined-Plane Locking System - IPLOS was developed for these purposes. IPLOS guarantees a low transient resistance amid the casework sections and the reflection of sound waves at their boundaries, facilitating the Apollo DAC performance.
The material selected for this is special aluminium alloy with a high damping factor that limits the sound wave propagation velocity. All chassis elements are precision milled from an integral billet. Each plate then subsequently undergoes ultrasonic quality control to ensure it is absolutely free of internal defects. For additional vibration protection, the PCBs and the transformer module are mounted on a solid 12 mm thick plate made of the same alloy.
The supporting feet location points are determined by the computer simulation of the soundwave interference pattern in the chassis bottom at a variety of frequencies.