SX-1250 (Type KC)

Radio Receiver

Main Details
Maker Pioneer Brand
Additional Model ID SX-1250/KC
Form Factor Desktop
Signal Path Analog Hardware
Made In Japan
Date Produced 1976-1977
Dimensions 7.4"x21.8"x18.25" (HxWxD)
Weight 64.25lbs
Power Source 120VAC, 60Hz 650VA (CSA), 1200W (Max)
Frequency Response 5Hz-100kHz +0dB, -1dB
Notes Market specific model for Canada
Additional Specifications
Power Output (8/4Ω) 160W/200W
THD (Rated Output) ≤0.1%
THD (80W, 8Ω) ≤0.05%
THD (1W, 8Ω) ≤0.07%
IMD (Rated Output, 8Ω, 50Hz:7kHz) ≤0.1%
IMD (80W, 8Ω, 50Hz:7kHz) ≤0.05%
IMD (1W, 8Ω, 50Hz:7kHz) ≤0.07%
Input Sensitivity (Power Amp In) 1V
Input Impedance (Power Amp In) 50kΩ
Damping Factor (20Hz-20kHz, 8Ω) 30
SNR (IHF, Short-Circuited, A Network) 100dB
Input Sensitivity (Phono 1, 2) 2.5mV
Input Impedance (Phono 1, 2) 50kΩ
Phono Overload Level (1kHz, THD 0.1%) 500mV
Input Sensitivity (Mic) 6.5mV
Input Impedance (Mic) 50kΩ
Input Sensitivity (Aux) 150mV
Input Impedance (Aux) 50kΩ
Input Sensitivity (Tape Play 1, 2) 150mV
Input Impedance (Tape Play 1, 2) 50kΩ
Output Level (Tape) 150mV
Output Level (Tape Rec 2, DIN Connector) 30mV
Output Impedance (Tape Rec 2, DIN Connector) 80kΩ
Output Level (Pre Out) 1V
Output Impedance (Pre Out) 1kΩ
THD (Pre Out, 20Hz-20kHz, 1V) ≤0.02%
Frequency Response (RIAA EQ) 30Hz-20kHz ±0.2dB
SNR (Phono, IHF, Short-Circuited, A network) 75dB
Frequency Response (Aux, Tape) 10Hz-50kHz +0dB/-1dB
SNR (Aux, Tape, IHF, Short-Circuited, A network) 90dB
FM Sensitivity (Mono) 8.7dBf 3.0μV/300Ω
FM Sensitivity (Mono, 50dB Quieting) 11.5dBf 4.1μV/300Ω
FM Sensitivity (Stereo) 14.5dBf 5.8μV/300Ω
FM Sensitivity (Stereo, 50dB Quieting) 36.0dBf 69μV/300Ω
FM Usable Sensitivity (IHF '58) 1.5μV
FM SNR (65dBf, Mono) 80dB
FM SNR (65dBf, Stereo) 74dB
FM Distortion (65dBf, 100Hz, Mono) 0.1%
FM Distortion (65dBf, 100Hz, Stereo) 0.25%
FM Distortion (65dBf, 1kHz, Mono) 0.1%
FM Distortion (65dBf, 1kHz, Stereo) 0.2%
FM Distortion (65dBf, 6kHz, Mono) 0.3%
FM Distortion (65dBf, 6kHz, Stereo) 0.3%
FM Capture Ratio 1.0dB
FM Alternate Channel Selectivity 83dB
FM Spurious Response Ratio 110dB
FM Image Response Ratio 110dB
FM IF Response Ratio 120dB
FM AM Suppression Ratio 60dB
FM Muting Threshold 13dBf 4.9μV/300Ω
FM Stereo Separation (1kHz) 50dB
FM Stereo Separation (35Hz-15kHz) 35dB
FM Subcarrier Product Ratio 74dB
FM SCA Rejection Ratio 74dB
Frequency Response (FM) 30Hz-15kHz +0.3dB/-1.0dB
Input Impedance (Antenna, Balanced) 300Ω
Input Impedance (Antenna, Unbalanced) 75Ω
AM Sensitivity (IHF, Ferrite Antenna) 300μV/m
AM Sensitivity (IHF, External Antenna) 15μV
AM Selectivity 40dB
AM Image Response Ratio 65dB
AM IF Response Ratio 85dB
Radio Station Display AM/FM
Signal Meter
Tuning Meter
Speaker A Indicator
Speaker B Indicator
Speaker C Indicator
Stereo Indicator
AM Indicator
FM Indicator
Phono 1 Indicator
Phono 2 Indicator
Aux Indicator
Power Toggle Switch On/Off
Bass 50Hz Rotary Encoder -5db to 5db
Bass 100Hz Rotary Encoder -10db to 10db
Tone Toggle Switch On/Off
Treble 10kHz Rotary Encoder -10db to 10db
Treble 20kHz Rotary Encoder -5db to 5db
Tape Duplicate Toggle Switch On/Off
Tape Monitor 1 Toggle Switch On/Off
Tape Monitor 2 Toggle Switch On/Off
Adaptor Toggle Switch On/Off
Balance Rotary Encoder Left/RIght
Mode Toggle Switch Stereo/Mono
Loudness Toggle Switch On/Off
Volume Rotary Encoder -∞db to 0db
Muting Toggle Switch Off/-20db
Speakers Latching Push Switch A
Speakers Latching Push Switch B
Speakers Latching Push Switch C
Filter Latching Push Switch 30Hz
Filter Latching Push Switch 8kHz
FM Latching Push Switch Multipath
FM Latching Push Switch Muting Off
Source Latching Push Switch AM
Source Latching Push Switch FM
Source Latching Push Switch Phono 1
Source Latching Push Switch Phono 2/Mic
Source Latching Push Switch Aux
Radio Station Rotary Pot AM/FM


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