ESC
SX-1250 (Type KC)

SX-1250 (Type KC)

BrandPioneer
FunctionRadio Receiver
Produced1976-1977
CountryJapan
Model IDSX-1250/KC
Form FactorDesktop
Signal PathAnalog Hardware
Dimensions55.4 × 18.8 × 46.4 cm (W × H × D)
Weight64.25lbs
Power120VAC, 60Hz 650VA (CSA), 1200W (Max)
Frequency Response5Hz-100kHz +0dB, -1dB
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 Ratio1.0dB
FM Alternate Channel Selectivity83dB
FM Spurious Response Ratio110dB
FM Image Response Ratio110dB
FM IF Response Ratio120dB
FM AM Suppression Ratio60dB
FM Muting Threshold13dBf (4.9μV/300Ω)
FM Stereo Separation (1kHz)50dB
FM Stereo Separation (35Hz-15kHz)35dB
FM Subcarrier Product Ratio74dB
FM SCA Rejection Ratio74dB
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 Selectivity40dB
AM SNR55dB
AM Image Response Ratio65dB
AM IF Response Ratio85dB
Controls
  • 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
Displays
  • Display · Radio Station · AM/FM
  • Meter · Signal
  • Meter · Tuning
  • Indicator · Speaker A
  • Indicator · Speaker B
  • Indicator · Speaker C
  • Indicator · Stereo
  • Indicator · AM
  • Indicator · FM
  • Indicator · Phono 1
  • Indicator · Phono 2
  • Indicator · Aux
NotesMarket specific model for Canada