Stereo Cassette Deck (1980-82)
Type: 3-head, single compact cassette deck
Track System: 4-track, 2-channel stereo
Tape Speed: 4.8 cm/s
Heads: 1 x combination record/playback, 1 x erase
Tape Type: type I, FeCr, Cr02, Metal
Noise Reduction: B
Frequency Response: 20Hz to 20kHz (Metal tape)
Signal to Noise Ratio: 65dB (dolby B)
Wow and Flutter: 0.04%
Total Harmonic Distortion: 0.8%
Input: 77.5mV (line), 0.25mV (mic)
Output: 0.435V (line)
Dimensions: 430 x 130 x 290mm
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Reviewed Apr 23rd, 2016 by gross_one
I bought mine in 1981, and am currently rejuvenating it after several years in storage. Absolutely the best cassette deck in it's price range at the time, and has stood the test of time well. The only problem I ever had was with TDK SA tape 'shrieking', which I fixed by using Maxell. Overall, an excellent unit!
Reviewed Jan 25th, 2016 by ilkkasuni
One of the most reliable and endurable pieces of hifi gear, I ever had. The TC-K81 humbly served me for two decades in heavy, very heavy use.
The TC-K81 was of Sony's top-of-the-line models, and considering the price tag, this tape deck was a bull's eye.
Very good frequency response, even when using standard ferro tapes. With Sony UCX-S and Metal tapes, excellent results. The multi-color peak hold level meters were almost ideal for recordings. The most critical ear just might have had something to say about the signal-to-noise ratio, or the utmost low tones reproduction below some 30...35 Hz. Still, the TC-K81 was a lean, mean recording machine.
For a 3-head deck, properly dual capstan. Fast and accurate functions, ease of use, even though quite noisy mechanism when switching from wind to playback etc.