The Pioneer CT-S630 S was only 1 year. It was the first deck of the 6 series with a single-capstan drive (previously a dual-capstan drive on the CT-S610 and 620), which the stereo testers (Hifi magazine, see below) also resented. After him, the CT-S640 S was built with the same motors and the same drive from ALPS, but with an additional servo motor for the cassette compartment.
STEREO 11/1994: no star (satisfactory). " + The perfect calibration computer gets uncolored sound from all bands. - Single-capstan drive with only two motors."
STEREOPLAY 10/1994: Top class II, Price/performance: Very good. "Clean piano stops with almost perfect background silence and the magnificent, structured reproduction of entire orchestras catapulted the Pioneer deck into the middle of top class II. No one will complain about the fact that a recorder thick ship like Sony 's TC-K808 ES (1000 DM, top class II reference) can conjure up even more balance and stability from the tapes." (Stereoplay 10/1994, p.19)