SR-703
(1977)
The SR-703
is an outstanding value because it offers the power most of today's inefficient
speakers demand with no more than 0,3% total harmonic distortion. This receiver
delivers 40 watts per channel RMS into 8 ohms from 20 to 20,000 Hz.
Feautres
Includes:
High quality
FM tuner,
High
selectiviy and low distortion IF amplifier using IC and 2 ceramic filters
Quadrature
detection,
Phase lock
loop circuitry, for FM/MPX circuit,
A ceramic
filter IC in AM tuner
Two large
easy-to-read meters,
Large-sized
flywheel tuning knob,
All-stage
direct -connection inverted Darlington OCL amplifier,
New ICs in
the equalizer and main amplifier
Electronic
power protection circuit,
High filter,
Detent
controls,
Tape dubbing
Source
monitor.
Two speaker
system connections
Specifications:
Audio
Section
Min. RMS
Continuous Power Output (both channel driven):
40 W +
40 W (8 Ω, 20-20,000 Hz, THD 0,1%)
55 W +
55 W (8 Ω, 1 kHz, THD 0,1%)
60 W +
60 W (4 Ω, 1khz, THD 0,1%)
Music Power
(IHF): 65 W + 65 W per channel into 8
ohms
Power
bandwidth: 10 Hz - 30 kHz
Frequency
Characteristics: 10 Hz - 30 kHz ±1 db
Total
Harmonic Distortion:
At rated
output : less than 0,3%
At ½ rated output:
Less than 0,07%
Intermodulation
Distortion:
At rated
output : 0,5%
At ½ rated output: 0,1%
Input
Sensitivity/Impedance:
Phono
: 2,5 mV/47 k Ω
Aux
: 200 mV/50 k Ω
Tape
1, 2 : 200 mV/50 k Ω
Adaptor
: 200 mV/50 k Ω
DIN
: 450 mV/70 k Ω
Output level
Tape Out :
200 mV :
phono, Aux at rated input;
200 mV : FM
400 Hz, 30% dev. Input; 1 mV;
200 mV : AM
400 Hz, 30% mod. Input ; 1mV
DIN Out
: 40 mV (phono at rated input)
Signal-to-Noise
Ratio (IHF, Input shorted, A-network, rated power):
Phono : 70 dB
Aux : 80 dB
Tape : 80 dB
Damping
Factor: 30 (1 kHz, 8 Ω)
Equalizer: RIAA ±1 dB
Bass
Control: ±10 dB at 100 Hz
Treble
Control: ±10 dB at 10 kHz
Loudness
Control: +9 dB at 100 Hz ; +4 dB at 10
kHz
High
Filter: -5 dB at 10 kHz
Semiconductors: 5 ICs; 1 FET; 24 Transistors; 35 Diodes; 1
Thyristor
FM Section
Frequency
Range: 88 - 108 MHz
Usable
Sensitivity (IHF): 1,8 µV
Signal-to-Noise
Ratio [Mono/Stereo]: 74 dB / 68 dB
Total
Harmonic Distortion [Mono/Stereo]:
At 100 Hz
: 0,3% / 0,4%
At 1 kHz
: 0,2% / 0,3%
At 6 kHz :
0,3% / 0,3%
Frequency
Response: 30 Hz - 15 kHz +0,2 -1,5 dB
Image
Response Ratio: 56 dB
Spurious
Response Ratio: 80 dB
IF Response
Ratio: 90 db
Altenate
Channel Selectivity: 60 dB
Capture
Ratio: 1 dB
AM
Suppression: 55 dB
Stereo
Separation: 40 dB
SCA
Rejection: 65 dB
Muting
Threshold: 14 µV
Antenna
Input:
Balanced
: 300 ohms
Unbalanced
: 75 ohms
AM Section
Frequency
Range: 530 - 1,605 kHz
Sensitivity: 300 µV/m (S/N 20 dB); 20 µV (IHF, ext. Antenna)
Image
Rejection: 50 dB
IF
Rejection: 50 dB
Selectivity
(IHF): 36 dB
Signal-to-Noise
Ratio: 50 dB
Antenna: Ferrite and separate terminal
Tape
Monitor: 1,2
Speaker
Switch: A, B, A + B
Speaker
terminal: One-touch terminal
Power
Supply: 100/120/220/240 V 50/60 Hz
Power
Consumption: 320 W
Dimensions
(W x H x D): 489 x 143 x 400 mm
Weight: 11,5 kg (25,4 lbs)
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