TC-C521
| Manufacturer | Sony |
| Function | Tape Machine (5 Cassette Changer with Auto Reverse) |
| Country | Japan |
| Form Factor | Desktop / 19" Rackmount Convertible |
| Signal Path | Analog Hardware |
| Dimensions | 430 x 130 x 350mm |
| Weight | 6.9kg |
| Frequency Response | 25Hz to 19kHz (Metal tape) |
| Tape Speed | 4.8 cm/s |
| Heads | 1 x record/playback, 1 x erase |
| Tape Types | Type I, CrO2, Metal |
| Noise Reduction | B, C, HX Pro |
| Signal to Noise Ratio | 74dB (dolby C) |
| Wow and Flutter | 0.06% |
| Total Harmonic Distortion | 1.8% |
| Motor | 1 x reel, 1 x capstan, 3 x assist |
| Input | 160mV (line) |
| Output | 0.5V (line) |