I know this isn't technically quad, but I bought it spacifically for CD-4 playback. I hear linear turn tables are good for trouble free CD-4 playback. This little guy sounds great in stereo, even with the original run of the mill audio technica installed at the factory with spherical stylus. Tracks perfectly. Impervious to jolts. Has the fancy track select/skip/Return programmable feature. Quartz lock controlled direct drive. Low tracking force. I think this will be a CD-4 beast.