The SX-424
is a medium-powered, budget-priced AM/FM solid state stereo receiver with
special features for sensitive FM tuning and wide frequency response.
Pioneer
SX-424 is proof positive taht stereo on a limited budget doesn't have to mean
limited stereo sound. In a handsome package of quality circuitry and reasonable
price, the SX-424 offers up to 50 watts of music power at 4 ohms, very
sensitive FM reception a wide linear type dial scale for fine FM tuning, and
highly respectable specifications both
for the FM tuner section and the audio section. It's versatile unit, too
because you can use it with almost all music sources available today, including
records, tape, FM and microphone. Best of all it's Pioneer made, which means
that, for its price, there is probably nothing available today that can compare
with its quality.
Specifications
Amplifier Section
Music Power
Output (IHF): 50 W at 4 Ω; 37 W at 8 Ω
Continuous
Power Output (1 kHz each channel driven):
18 W / 18 W
at 4 Ω
14 W / 14 W
at 8 Ω
Continuous
Power Output (1 kHz both channel driven):
13 W + 13 W
at 4 Ω
12 W + 12 W
at 8 Ω
Total
Harmonic Distortion: less than 1%
(continuous power output)
Intermodulation
Distortion: less than 1% (continuous
power output)
Power
Bandwith (IHF): 20 Hz to 45 kHz (8 Ω,
T.H.D. less than 1%)
Frequency
Response: 20 Hz to 70 kHz ±3 dB
Speakers
output Impedance: 4 to 16 Ω
Damping
Factor: 40 (8 Ω, 1 kHz)
Input
Sensitivity/Impedance:
Phono Mag
: 3 mV/50 k Ω
Mic : 6,5 mV/50 k Ω
Aux : 180 mV/100 k Ω
Tape Monitor
: 180 mV/100 k Ω
Tape Monitor
(DIN) : 180 mV/100 k Ω
Recording
Output:
Tape Rec
(Pin Jack) : 180 mV
Tape Rec
(DIN connector) : 36 mV
Bass Control
: -9 dB, +9 dB / 100 Hz
Treble
Control : -9 dB, +6 dB / 10 kHz
Equalization
Curve (Phono): RIAA standard
Loudness
Contour: +9,5 dB/100 Hz; +5,5 dB/10 kHz
(with volume control set at -40 dB position)
Hum and
Noise (IHF):
Phono : more than 75 dB
Aux : more than 85 dB
FM Tuner
Section
Requency
range: 88 MHz to 108 MHz [87,5 MHz to
108 MHz, FTZ approved]
Usable
Sensitivity (IHF): 2,3 µV
Capture
Ratio (IHF): 3,5 dB
Image
Rejection: more than 50 dB (98 MHz)
IF
Rejection: more than 80 dB (90 MHz)
Spurious
Rejection: more than 70 dB (90 MHz)
AM
Suppression: 45 dB
Signal-to-Noise
Ratio: 65 dB
Harmonic
Distortion:
Mono : less than 0,6% (100% mod.)
Stereo
: less tahn 0,8% (100% mod.)
Tuning
Indicator: Signal strength type
Stereo
Separation: more than 40 dB (1 kHz)
Sub Carrier
Suppression: more than 35 dB
Noise
Filter: Switchable to On-Off
Antenna
Input: 300 Ω balanced; 75 Ω unbalanced
De-emphasis
Selector: 50 µS (FW model only)
AM Tuner
Section
Frequency
Range: 525 kHz to 1605 kHz
Usable
Sensitivity (IHF): 15 µV
Image
Rejection: more than 45 dB (1,000 kHz)
IF
Rejection: more than 35 dB
Signal-to-Noise
Ratio: more than 50 dB
Antenna:
Built-in ferrite loopstick antenna
Miscellaneous
Semiconductors: Transistors 30, Diodes 24; FETs 1
Power
Requirements
: 120 V 50 Hz; 220 V 50/60 Hz, or 110,
120, 130 220, 240 V (switchable) 50/60 Hz
Consumption: 90 W max
AC
Outlets: 1 Unswitched, 1 switched
Dimensions
(W x H x D): 431 x 146 x 347 mm
(16-31/32" x 5-3/4" x 13-21/32")
Weight
(net):
120 voltage
model : 7,5 kg (16 lb 8 oz)
220 voltage
model: 7,9 kg (17 lb 6 oz)
I have one of these that i found somewhere years ago. Looks good, missing one knob. Not powered up as no variac to do so. Where is a good place to sell this unit? I am not a stereo/hi-fi person. Hardly anything available where i live to listen to.
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