4-Channel Stereo Receiver
4-channel
Dolby recording and payback with an
ordinary tape deck for first time in audio history. This is only one of the
many outstanding features of the new AS-1080 DB. This new 4/2 channel
compatible receiver incorporates all the latest engineering techniques and
offers performance quality to match anything on the market todey. Yet the cost
of this deluxe model is far below what you would expect to pay for such
quality. Robust 3mm thick aluminium front panel. Easy-to-operate precise
controls. Designed for efficient operation of present and future audio
capability.
All-Stage Direct Coupled OCL Pure Complementary Power Amplifier
40 watts per
channel continous power output (80 watts per channel at 2-Ch power Doubler),
minimum RMS at 8 ohms load impedance with no more than 0,2% distortion. These
outstanding specifications are the result of employing an all-stage
direct-coupled OCL pure complementary 4 Power IC circuit in the all important
power section.
Power Transistor Protection Circuit
A protection
circuit is activated in case of a short caused by a wrong speaker connection or
when input is excessive to protect the power transistors. Further, this circuit
cancels the irritating speaker shock noise when the power switch is turned On
or Off
Varied 4-channel operation includes Dolby 4-channel performance (a
first in the field of audio)
This
4-channel / 2-channel compatible unit, in addition to regular and discrete
stereo, SQ Full Logic and Matrix 4-channel stereo, and CD-4 capability, also
features 4-channel Dolby recording and playback with an ordinary 4-CH tape
deck.
SQ Full Logic Decoder Circuit
The SQ Full
Logic decoder of this model is a superior Front/Back Logic wave matching
circuit employing a 6-pole phase shifter for excellent front and rear channel
separation. 3 advanced large scale Sony
ICs. SQ Indicator lamp.
Matrix Decoder Circuit
Facilitates
playback of matrix encoded phonograph records.
CD-4 Demodulator Circuit and Separation Adjust
A built-in
CD-4 demodulator circuit and CD-4 Separation Adjusters facilitate easy playback
of CD-4 records. Front panel CD-4 indicator Lamp. CD-4 test record included in
standard accessories.
Four separate Dolby Circuits
A separate
Dolby Circuit for each channel enables 4-channel Dolby Recording and Playback
with an ordinary 4-channel tape recorder or tape deck for the first time in
audio history.
Dolby Operation
The Dolby
System of this model facilitates recording and playback with an ordinary
4-channel tape recorder or tape deck. Precise Dolby Controls, a Dolby Level
Meter Switch, and Dolby Level Adjustment Tape (included in the standard
accessories) enable easy and precise Dolby System level adjustment, 40channel
or 2-channel Dolby recording and playback, 4-channel or 2-channel Dolby Dubbing
(Dolby recording from ordinary tape playback)from Tape 1 to Tape 2 System, and
Dolby FM broadcast reception are among the outstanding Dolby capabilities of
this model.
Two compelete 4-channel Tape Deck Connections for varied recording and
Dubbing techniques.
Multiple
Source Selector, Tape Monitor, and Mode Switch positions and two complete tape
systems for a plethora of 2-channel or 4-channel recording and dubbing
techniques. Use Tape 1 and tape 2 systems separately or simultaneously. Easy
dubbing to and from Tape1 and tape 2 Systems. Also equipped with two complete
4-channel speaker connections.
Two Channel Power Doubler
Setting the
Speaker Switch to 2-Ch Power Doubler switches the amplifiers to BTL for all
available power in 2-channel mode. Further, transition is smoothe with no
irritating speaker noise.
Up-to-Date High Efficiency IC Circuitry in FM IF Section
This totally
new up-to-date element is comprised of a 6-stage limiter circuit, a detection
circuit, and several auxiliary circuits and does the work of 213 separate parts
using parts available to date. Namely, it would require 100 transistors, 84
resistors, 25 dides and 4 condensers to accomplish the same thing. Further,
because the detection circuit employs "Quadrature" detection,
excellent linearity and low distortion is attained over an exceptionally wide
frequency range.
PLL MPX Section for Good
Separation and Low Distortion
This model
features the new PLL (Phase Lock Loop) circuit which locks the 19 kHz FM pilot
signal phase to the phase of the 38 kHz switching signal for complete
stability. Separation better than 40 dB. Less than 0,4% THD.
Automatic FM Center Tuning and FM Mute Switch
Perfect
center tuning is always attained. With AFC (Automatic Frequency Control), it is
not necessary to tune to exact FM center frequency. Simply bring the needle
within the FM center scale of the meter and perfect center tuning is
automatically of fluctuation in power supply voltage or temperature. An FM Mute
Switch enables the operator to effectively cut noise originating prior to
antenna input.
Large Balanced Flywheel Tuning
Large
balanced flywheel tuning and superior FM and Am circuitry provides smooth and
easy "power steering" tuning and top FM and Am reception.
Loudness Circuit for Balanced Sound at Low Volume
Boosts bass
and treble response for balanced sound at low volume
High and Low Filter Switches
Eliminates
high and low frequency disturbances for clearer playback
4-Channel Remote Control Balance
A rear panel
Remote Control Jack accomodates AKAI optional accessory Remote Control Unit
RC-4CH for remote control of front/rear and left/right speaker balance and
volume
FM 4-CH Output Terminal
Equipped
with rear panel FM 4-channel output terminal for connection of an adapter for
future FM 4-CH broadcast reception.
Other Features
Two full
speaker systems feature easy push button connectionn.
300 Ω and 75 Ω antenna terminals with distance/local switch plus AM bar antenna.
Separate
front and rear channel Bass and Treble controls for perfect tone control.
Front and
rear channel headphone jacks.
Specifictions
Amplifier
Section
Continuous
Power Output 4-channels driven:
40
watts per channel, min. RMS, at 8 Ω
from 20 to 20,000 Hz, with no more than 0,2% THD
4 x 50
watts into 8 Ω at 1 kHz with no more
than 0,2% THD
Continuous
Power Output 2-channel driven (Power Doubler ON):
80
watts per channel,min.RMS at 8 Ω from
20 to 20,000 Hz, with no more than 0,2% THD
2 x
100 watts into 8 Ω at 1 kHz with no
more than 0,2% THD
Power
Bandwidth (IHF): 10 Hz to 60,000 Hz / 8 Ω (distortion within 0,2%)
Input
Sensitivity:
Phono
: 3 mV/ 47 k Ω (CD-4 1,5 mV/ 47 k Ω)
AUX :
160 mV/47 k Ω
Tape 1
& 2 : 160 mV/47 k Ω
Signal-to-Noise
Ratio (IHF):
Phono :
Better than 80 dB
AUX : Better
than 90 dB
Channel
Separation (IHF):
Phono : Better than 50 dB (at 1kHz)
Equalizer:
RIAA Standard ± 1 dB (Phono)
Tone Control
Bass : ±10
dB at 100 Hz
Treble : ±10
dB at 10 kHz
Loudness
Control: +9 dB at 100 Hz, +4 dB at 10 kHz (Volume Control at -30 dB
position)
Filter:
High : -6 dB
at 10 kHz
Low : -10 dB
at 50 Hz
Dolby
System: Dolby "B" processor
Dolby
Tone: 400 Hz / Rec. Out, PIN 150 mV
FM Tuner
Section
Frequency
Range: 88 MHz to 108 MHz
Sensitivity
(IHF): 1,9 µV
Capture
Ratio (IHF): 1.0 dB
Selectivity
(IHF): Better than 70 dB at 98 MHz
Signal-to-Noise
Ratio: Better than 70 dB
Image
Rejection: better than 75 dB at 98 MHz
IF
Rejection: Better than 90 dB at 98 MHz
Spurious
Rejection: better tham 80 dB at 98 MHz
Harmonic
Distortion
Monaural :
less than 0,2%
Stereo :
less than 0,4%
FM Stereo
Separation: Better than 40 dB (1kHz)
FM
Muting: Variable (3 to 300 µV) ON - OFF
Antenna
Input Impedance:
Balanced
: 300 Ω
Unbalanced
: 75 Ω
AM Tuner
Section
Frequency
Range: 535 kHz to 1,605 kHz
Sensitivity
(IHF):
200 µV/m
(Bar antenna)
5 µV
(External antenna)
Image
Rejection: Better than 55 dB at 1,000
kHz
IF
Rejection: Better than 45 dB at 1,000
kHz
Selectivity
(IHF): better than 30 dB at 1,000 kHz
AM
Distortion: Less than 0,6%
Signal-to-Noise
ratio: Better than 50 dB
General
Section
Semiconductors: 1 FET, 90 Transistors, 68 Diodes, 18 ICs
Power
Requirement: 110 - 120 V, 220 - 240 V
(Switchable) 50/60 Hz
Dimensions
(W x H x D): 520 x 182 x 409 mm (20,5" x 7,2" x 16,1")
Weight: 19,3 kg (42,5 lbs)
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