Kenwood
Solid State Audio Denoiser KF-8011 does
not belong to the conventinal noise filter which excludes necessary signals
together with noises. It functions as the S/N Stretcher or Noise Reduction
System used in the process of disc production, and electronically eliminates
the noises included in the sources.
Thanks to its exclusive circuitry, KF-8011 remarkably increases the
signal to noise ratio and fully refreshes the program sources. It's especially
profitable for tape dubbing.
Special
features
Minute
Denoising
The KF-8011
decreases the noises between 3 kHz and 15 kHz, which affects most badly on the
sound performance, by 6 - 10 dB. The built-in Frequency Selector enables to
pick up the particular frequency range in order to denoise precisely.
Noise level
Adjustor
The KF-8011
features a pair of large Level Meters and 10-step type level Adjustor for
setting and monitoring the suitable level pint of program sources. In addition,
the volume of cut-off noises can be controlled by the Noise level Adjustor.
That means KF-8011 always functions so as to keep the S/N ratio the best
condition.
Sufficient
Input Jacks
As the
Denoiser is to be connected to the Rec/Play terminals of an amplifier, KF-8011
has the complete input and output for tape decks including DIN connector. It
also has 4 pairs of input jacks and by the Input Selector on the front panel 4
sources are switchable.
Check System
for Denoising Condition
The built-in
Defeat Switch permits to check the denoising condition - what frequency range
is to be denoised, how much the S/N ratio has been improved, etc.
Automatic
Circuit Switching
As shown on
the following diagram, the Denoiser is to be inserted to the input side when
making refined recording, and to the output side when enjoying refined
playback. It is, however, quite needless to reconnect KF-8011. The Denoiser
Position on the front panel switches the circuitry automatically.
Specifications
Frequency
Response: 10 Hz - 80 kh ±0,5 dB
Noise
Blocking Characteristics (0db =1 V, at 3,5 - 12 kHz):
Input Level
/ Noise Blocking Amount (S/N Improving Ratio):
0 dB / 0 dB
-30 dB / 0
dB
-40 dB / 2
dB
-45 dB / 10
dB
50 dB / 15
dB
Noise
Blocking Filter Frequency Response:
3 - 4,5 kHz
: -8 dB (1 kHz = 0 dB)
4,5 - 6,5
kHz : -8 dB (1 kHz = 0 dB)
6,5 - 10 kHz
: -8 dB (1 kHz = 0 dB)
10 - 15 kHz
: -8 dB (1 kHz = 0 dB)
(-20 dB at
following points: 3,5 kHz, 5,5 kHz, 8
kHz, 12 kHz)
Gain: 0 dB ±1 dB
Maximum
Input: 8 V at level Control
"0" position
Distortion: less than 0,09% (5,5 kHz, 1 V input)
Input
Impedance: More than 50 k Ω
Output
Impedance: 1 k Ω
Level
Difference of Counter-Channel: Within ±1
dB (1 kHz)
S/N
Ratio: Better than 75 dB (1 kHz, 0 dB =1
V)
Channel
Separation: Better than 55 dB
Input and
Output terminals:
4 x Input
2 x output
1 x Tape
paly, Tape Rec
1 x Tape DIN
Switches and
Controls:
Tape Monitor
Switch;
Large VU
Meter;
De-Noiser
Position Selector;
Filter
Defeat Switch;
Level
Control;
Noise level
Control;
Through
Switch
Power
Voltage: 110 - 120 V, 220 - 240 V; 50/60
Hz
Power
Consumption: 10 watts
Dimensions
(W x H x D): 408 x 134 x 280 mm
(16-5/16" x 5-5/32" x 11-1/32")
Weigt: 6,4 kg (14 lbs)