Philips CDM3 swing-arm CD mechanism 

There is one single-beam swing arm drive mechanism that was never used by Marantz, the Philips CDM3. This mechanism became well know when it was used in the professional-use Studer A730 (1988) developed jointly by Philips and the famous professional component manufacturer Studer. The Philips CDM3 was originally designed for use in car audio and had a lightweight die-cast body, which still managed to provide substantial rigidity. In addition to the Studer A730, the Philips CDM3 was also used by Luxman Japan.