The
Sony TC-K71 is outstanding examples of advanced technology in the service of
music. This machine provide the exceptional sound quality of Sony's
Independent-Suspension three-head design and the absolute precision of
Closed-Loop Dual Capstan drive. The K71 offers variable bias for TypeI tapes,
and including two-motor tape drive with BSL capstan motor and FG servo system,
Sony's Dolby IC for greater dynamic range and lower distortion, microprocessor logic control with remote and
timer capabilities, LED Peak-Program Meters with double indication peak-hold,
and selected electronic parts for superior performance.
Three-Head Design
Many audiophiles
prefer three-head decks - with separate erase, ecord, and playback heads -
because this format permits them to monitor the tape an instant after it has
been recorded. In this way, the user can compare the quality of the recorded
music with the original source. Tape monitoring is convenient and in demanding
applications, the monitored sound can be an invaluable recording tool. But
three heads yield significant performance advantages, too.
A conventional
cassette deck, with a combined record/play head different physical requirements
from playback. Recording is a high-energy process, involving signal levels some
40 dB higher than playback. For good recording dynamic range, the head gap should
be wide - three to five microns. Yet for playback high-frequency response, the
gap should be narrow - no more than one micron. Any combined record/play head
must necessarily represent a compromise between these two requirements.
The
Sony TC-K71 circumvent this compromise. This deck have separate record and
playback heads, each optimized to its particular function. The playback head
has a narrow 0,9 micron gap for response
out to 18,000 Hz. And the record head has a wide 4,5 micron gap for superb
dynamic range. In fact, the high-energy capabilities of the record head easily meet the requirements of the
most demanding tape formulations, including metal particle tape.
Variable Bias for
Type
Slight variations in
bias requirements from one brand to another can result in overly
"bright" or "dull" high frequency response, and excess
distortion. The problem is most serious for Type I tapes, which have the widest
range of bias need. For this reason, the TCK71 variable bias for Type I
cassettes. To use the bias control, you record sample material and switch back
and forth between Tape and Source, correcting the bias for proper tonal
balance.
Specifications
Fast-Forward/Rewind
Time (C-60): 80 sec.
Wow and
Flutter: 0,04% (WRMS), 0,12% (DIN 45507)
Frequency Response
(±3 dB, Re: -20 dB)
Metallic Tape : 30 -
18,000 Hz
FeCr Tape : 30 -
18,000 Hz
EHF Tape : 30 -
17,000 Hz
SHF Tape : 30 -
15,000 Hz
Re: 0 dB Metalic
Tape : 30 -13,000 Hz
Signal-to-Noise
Ratio ( Dolby NR Off, Re: 3% THD, Peak, IHF-A Wtd.)
Metallic Tape : 60
dB
FeCr Tape : 60 dB
EHF Tape : 58 dB
SHF Tape : 54 dB
Improvement with
Dolby NR On : Up to 5 Db at 1 kHz,
10 Db at 5 kHz or above
Total Harmonic
Distortion (1 kHz, Re: 0 db Record level)
Metallic Tape : 0,8%
FeCr Tape : 0,8%
Crosstalk (1 kHz,
tracks): 60 dB
Separation (1 kHz,
channels): 35 dB
Erasure (400 Hz,
incl. Metallic Tape): 60 dB
Bias Frequency: 105 kHz
Meter Range: -40 dB, +8 dB
Line Input
Sensitivity/Impedance: 77,5 mV/50 k ohms
Mic Input
Sensitivity/Impedance: 0,25 mV/Low
Line Output
Level:
Fixed : 435 mV
Variable : 27,5 - 435 mV
Line Output Load
Impedance Nominal/Minimum: 50/10 k ohms
Headphone Output
Level: 4,9-77,5 mV
Nominal Headphone
Impedance: 8 ohms
Power
Requirements: AC 120/240 V 50/60 Hz
Power
Consumption: 26 W
Dimensions (W x H x
D): 430 x 130 x 290 mm (17" x
5-1/8" x 11-3/8")
Weight: 5,6 kg (12 lbs 5 oz)