Pioneer

SX-525/KCW

Receiver

Main Details
Maker Pioneer Brand
Function
Channels/Tracks
  • 2 × Channel
Form Factor Standard Width
Signal Path Analog Hardware
Made In Japan
Date Produced 1972-1974
Dimensions
(H × W × D)
Weight 17.6lbs
Power Source 120VAC, 60Hz 120W (Max)
Frequency Response 15Hz-30kHz ±1dB
Notes CSA approved (Canada) variant.

In 1972 Pioneer introduced the SX-525 and continued production up until around 1974. The SX-525 is a low to medium powered receiver designed for those on a budget. Pioneer's advertising language at the time stated:

Stereo on a budget can have a lot of the power and a lot of the frills of very expensive stereo, as this superlative new AM/FM receiver from Pioneer so amply proves.
Additional Specifications
Output Power (20Hz-20kHz, 1% THD, 8Ω) 13W
Output Power (1kHz, Both Channels Driven, 8/4Ω 17/21W
Output Power (1kHz, Single Channel Driven, 8/4Ω) 20/26W
Output Power (Music, IHF, 8/4Ω) 52/72W
THD (Continuous Power Output) 1%
THD (8Ω, 10W) 0.05%
IMD (Continuous Power Output) 1%
IMD (8Ω, 10W) 0.2%
Power Bandwidth (IHF, 8Ω, 1% THD) 10Hz-45kHz
Damping Factor (8Ω, 1kHz) 40
Input Sensitivity (Phono, Mag) 2.7mV
Input Impedance (Phono, Mag) 50kΩ
Input Sensitivity (Mic) 6mV
Input Impedance (Mic) 100kΩ
Input Sensitivity (Aux) 200mV
Input Impedance (Aux) 70kΩ
Input Sensitivity (Tape) 200mV
Input Impedance (Tape) 70kΩ
Output Voltage (Tape) 200mV
Output Voltage (Tape DIN) 30mV
SNR (Phono) 75dB
SNR (Aux) 85dB
Tuning Range (FM) 88MHz-108MHz
Usable Sensitivity (FM, IHF) 2.2µV
Capture Ratio (IHF) 3dB
Selectivity (FM, IHF) 45dB
Image Rejection (FM, 98MHz) 50dB
IF Rejection (FM, 90MHz) 80dB
Spurious Rejection (98MHz) 80dB
AM Suppression 50dB
SNR (FM) 65dB
THD (Mono) 0.6%
THD (Stereo) 0.8%
Stereo Separation (1kHz) 40dB
Sub-Carrier Suppression 40dB
Tuning Range (AM) 525kHz-1605kHz
Usable Sensitivity (AM, IHF) 15µV
Selectivity (AM, IHF) 22dB
Image Rejection (AM, 1000kHz) 45dB
IF Rejection (AM) 35dB
SNR (AM) 50dB
MSRP (1973) $259.95
Connections
Phono In
Connector: RCA (Phono, Cinch)
Auxilaury In
Connector: RCA (Phono, Cinch)
Tape 1 Monitor
Connector: RCA (Phono, Cinch)
Tape 1 Record
Connector: RCA (Phono, Cinch)
Tape 2 Monitor
Connector: RCA (Phono, Cinch)
Tape 2 Record
Connector: RCA (Phono, Cinch)
Ground
Connector: Binding Post
Tape 1 Rec/PB
Connector: DIN
Speaker x 4
Connector: Other
Microphone In
Connector: 1/4" Phone Jack (6.35mm)
AC Outlet
Connector: Other
AC Outlet (Switching)
Connector: Other
Controls
Parameter: Speakers/Power
Control Type: Rotary Switch
Range: Power Off - Speaker A - Speaker Off - Speaker B - Speaker A+B
Parameter: Bass
Control Type: Rotary Switch
Range: Min - Flat - Max
Parameter: Treble
Control Type: Rotary Switch
Range: Min - Flat - Max
Parameter: Balance
Control Type: Rotary Pot
Range: Left - Norm. - Right
Parameter: Volume
Control Type: Rotary Pot
Parameter: Loudness
Control Type: Latching Push Switch
Parameter: FM Muting
Control Type: Latching Push Switch
Parameter: Tape Monitor 1
Control Type: Latching Push Switch
Parameter: Tape Monitor 2
Control Type: Latching Push Switch
Parameter: Mono/Stereo
Control Type: Latching Push Switch

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