Audio Database

Image of the SX 434
Commentary

A high-cost performance receiver with improved performance by incorporating the latest technologies of the time into the tuner and pre-main amplifier.

The EQ amplifier is a 2-stage direct connection type with accurate RIAA deviation, and the power amplifier section is a pure complimentary service OCL system directly connected to all stages.

The tuner section has a circuit configuration that uses a low-noise FET and a 3-series varicon for the FM front end and a high-integration IC and ceramic filter for the IF section.
In addition, an FM muting switch is cut off unpleasant inter-station noise during FM channel selection.
The dial scale is wide type, and the FM scale is linear (equal interval) scale.

A microphone mixing circuit allows you to sing along with program sources for records, tapes, FM and AM broadcasts.
The mixed signal can be recorded to tape or used as a microphone amplifier if the volume of the program source is minimized.

There are two sets of speaker jacks (A and B), and you can use them in four positions (A, B, A + B and OFF) by changing the switch.

Model Rating
Type FM/AM stereo receiver
FM Tuner Section
Practical sensitivity (IHF) 1.9 μ V
Capture Ratio (IHF) 1.5dB
Effective selectivity (IHF) 60dB
S/N 70dB
Image Interference Ratio (82 MHz) 60 dB or more
IF Interference Ratio (82 MHz) 90 dB or more
Spurious interference ratio 75 dB or more
AM suppression ratio 50dB
Harmonic distortion factor Mono : not more than 0.2%
Stereo : not more than 0.4%
Frequency characteristic 20 Hz to 15 kHz, + 0.2 -2.0 dB
50 Hz to 10 kHz, + 0.2 -0.5 dB
Stereo separation 1 kHz : 40 dB or more
50 Hz to 10 kHz : 30 dB or more
Carrier leak suppression ratio 40dB
Antenna 300 ohm balanced
75 Ω Unbalanced Type
Muting ON-OFF
<AM Tuner Section>
Practical sensitivity (IHF) 15 μ V
Selectivity 35 dB or more
S/N 50 dB or more
Image interference ratio 40 dB or more
IF interference ratio 50 dB or more
Antenna Ferrite bar antenna
Amplifier Unit
Circuit system Pure complimentary service OCL
Effective power
40 Hz to 20000 Hz, both channel drive : 15W + 15W (4 Ω)
15W + 15W (8 Ω)
1 kHz, both channel drive : 18W + 18W (4 Ω)
16W + 16W (8 Ω)
1 kHz, single-channel drive 23W + 23W (4 Ω)
19W + 19W (8 Ω)
Harmonic distortion factor Effective power : 0.8% or less
0.1% or less at 1W output
Cross modulation distortion factor Effective power : 0.8% or less
0.1% or less at 1W output
Output Bandwidth (IHF, both channel drives) 10 Hz ~ 70000 Hz (Distortion Factor 0.8%)
Damping factor (1 kHz, 8 Ω) 25 or more
Residual noise (8 Ω, pre + power amplifier) 0.5 mV or less
Input Sensitivity / Impedance Phono : 2.5mV/50k Ω
Phono maximum allowable input (rms/p-p) : 100mV/280mV
MIC : 10mV/60k Ω
AUX : 150mV/80k Ω
TapePB : 150mV/80k Ω
TapePB (DIN connector) : 150mV/80k Ω
Output Level / Impedance Tape Rec:150mV
Tape Rec (DIN Terminal) : 30mV/80k Ω
Speaker : A, B, A + B (4 Ω ~ 16 Ω)
HeadPhone : 4-16 Ω
Frequency characteristic Phono (RIAA deviation) : 30 Hz to 15000 Hz, ± 1 dB
MIC, AUX, Tape PB : 30 Hz to 25000 Hz, ± 1 dB
Tone control Bass : + 9 dB, -8dB (100 Hz)
Treble : + 5 db, -7dB (10 khz)
Loudness contour +10dB(100Hz)
+ 5 db (at 10 khz, volume -40dB)
S/N
(IHF short circuit, A network)
Phono : 70 dB or more
MIC : 70 dB or more
AUX, Tape PB : 90 dB or more
<General>
Power supply voltage 100 VAC, 50Hz/60Hz
Rated power consumption 60W
Maximum Power Consumption 110W
Power outlet Power switch interlock 1, non-interlock 2
External dimensions Width 430x Height 140x Depth 347 mm
Weight 8.1kg