photo of the original 1974 fronting of the Pioneer SX-434 radio reciever

The Pioneer SX-434 is a radio receiver that Pioneer Electronics Corporation introduced in 1974 to replace the SX-424. It was built through for the following two years before being superseeded by the SX-450 in 1975. It was rated at 15 watts per channel.

Features

The addition of a channel balance knob which was absent on the SX-424.
Pushbuttons were aluminum, not plastic.

FM tuner part

Practical speed (IHF) 1.9 microvolts
Capture ratio (IHF) 1.5dB
Effective selectivity (IHF) 60dB
S/N 70dB
Image stonewalling ratio (82MHz) 60dB or more
IF stonewalling ratio (82MHz) 90dB or more
Spurious stonewalling ratio 75dB or more
AM supression ratio 50dB
THD mono: 0.2% or less

stereo: 0.4% or less

Frequency characteristic 20Hz - 15kHz, and +0.2 -2.0 dB

50Hz - 10kHz, and +0.2 -0.5 dB

Stereo separation 1kHz : 40dB or more

50Hz-10kHz : 30dB or more

Carrier leakage supression ratio 40dB
Antenna 300-ohm balance type,

75-ohm unbalance type

Muting ON-OFF

AM tuner part

Practical speed (IHF) 15 microvolts
Selectivity 35dB or more
S/N 50dB or more
Image stonewalling ratio 40dB or more
IF stonewalling ratio 50dB or more
Antenna Ferrite bar antenna

Amplifier part

Circuit system 1 step of differential whole page hardwired-connection pure complimentary OCL

Effective output: 40Hz - 20000Hz, both channel drive : 15W+15W (4ohm)

15W+15W (8ohm)

1kHz, both channel drive : 18W+18W (4ohm)

16W+16W (8ohm)

1kHz, a one-side-channel drive 23W+23W (4ohm)

19W+19W (8ohm)

THD At the time of an effective output: 0.8% or less

At the time of 1W output: 0.1% or less

Cross modulation distortion At the time of an effective output: 0.8% or less

At the time of 1W output: 0.1% or less

Output bandwidth (IHF, both channel drive) 10Hz - 70000Hz (0.8% of distortion)
Dumping factor (1kHz, 8ohm) 25 or more
Remains noise (8 ohm, pre + power amplifier) 0.5mV or less
Input sensitivity/impedance Phono: 2.5mV / 50kohm

Phono maximum permissible input (rms/p-p): 100mV/280mV

MIC: 10mV / 60kohm

AUX: 150mV / 80kohm

TapePB: 150mV / 80kohm

TapePB(DIN termination): 150mV / 80kohm

An Output voltage/impedance Tape Rec:150mV

Tape Rec(DIN termination): 30mV / 80kohm

Speaker: A, B, A+B (4ohm-16ohm)

HeadPhone 4-16ohms

Frequency characteristic Phono (RIAA deflection): 30Hz - 15000Hz, ±1dB

MIC, AUX, Tape PB: 30Hz - 25000Hz, ±1dB

Tone control Bass: +9dB, -8dB (100Hz)

Treble: +5dB, -7dB (10kHz)

Loudness contour +10dB(100Hz)

+ 5dB (10kHz, volume 40dB o'clock)

S/N (An IHF short circuit, A network) Phono: 70dB or more

MIC: 70dB or more

AUX, Tape PB: 90dB or more

Synthesis

Supply voltage AC100V, 50Hz/60Hz
Power dissipation 60W
Maximum electric power consumption 110W
Power receptacle Power-switch interlock 1. un-interlocking 2.
Dimensions Width 430x height 140x depth of 347mm
Weight 8.1kg

The SX-434 was a middle-range reciever listed for $239.95.

References

<http://audio-database.com/PIONEER-EXCLUSIVE/amp/sx-434-e.html>

External links

| Audio Database