The TC-K 311, TC-K 411 and TC-K 511 S are similar in construction, all three have the cheap drive (a lot of plastic) from the previous year's TC-K 390 and TC-K 490 models, respectively .
Other models of the same series:
Manufacturer: Sony
Model: TC-K311
Type: Single, 2-head, 2-motors, Compact cassette deck
Current: 220 V, 23 watts
Dimensions: 430 x 123 x 310 mm (WxHxD)
Weight: 3.8 kg
Year: 1993 - 1994
Factory price approx.: 379 DM
System: 4-track, 2-channel (stereo)
Tape speed: 4.8cm / s
Heads: 1 x Recording / Playback, 1 x Erase Head
Motor: 1 x Reel (DC Motor), 1 x Capstan (DC servo motor)
Band Type: Type I, Cr02 II, Metal IV,
Noise Reduction: B, C,
MPX Filter : yes
Frequency response: 30 Hz to 15,000Hz (metal band and chrome, ±3 dB, IEC )