ESC
CR-420B

CR-420B

BrandYamaha
ManufacturerNippon Gakki Co. Ltd.
FunctionReceiver
Produced1978
CountryJapan
Form FactorStandard Width
Signal PathAnalog Hardware
Dimensions43.4 × 14.5 × 32.4 cm (W × H × D)
Weight20lbs
Power110/120/130/220/230/240VAC, 50/60Hz 200W
Frequency Response20Hz-20kHz ±1.5dB
Output Power (20Hz-20kHz, 0.05% THD, 8/4Ω)22/25W
Output Power (1kHz, 0.05% THD, 8Ω)25/50W
Power Bandwidth10Hz-40kHz
Damping Factor (1kHz, 8Ω)40
THD0.05%
Input Sensitivity (Phono, 1kHz)2mV
Input Level (Phono, Max)110mV
Input Impedance (Phono, 1kHz)50kΩ
Input Sensitivity (Aux)120mV
Input Impedance (Aux)37kΩ
Input Sensitivity (Tape)120mV
Input Impedance (Tape)37kΩ
Input Sensitivity (DIN)120mV
Input Impedance (DIN)37kΩ
Output Level (Rec. Out, Phono)120mV
Output Impedance (Rec. Out, Phono)220Ω
Output Level (Rec. Out, Tuner)120mV
Output Impedance (Rec. Out, Tuner)6kΩ
Output Level (Rec Out, Max)9V
Output Level (DIN Out)30mV
Output Impedance (DIN Out)52kΩ
Frequency Response (Phono, RIAA Deviation)±0.5dB
Frequency Response (Aux)20Hz-20kHz ±1.5dB
Frequency Response (Tape)20Hz-20kHz ±1.5dB
SNR (Phono, IHF A Network, 10mV)91dB
SNR (Aux, IHF A Network)97dB
SNR (Tape, IHF A Network)97dB
Residual Noise (IHF A Network)0.14mV
THD (Phono)0.05%
THD (Aux, 11W/8Ω)0.02%
THD (Aux, 23W/8Ω)0.05%
THD (Tape, 11W/8Ω)0.02%
THD (Tape, 23W/8Ω)0.02%
IMD (Aux, 11W/8Ω)0.02%
IMD (Aux, 22W/8Ω)0.05%
Tuning Range (FM)87.6MHz-108MHz
Usable Sensitivity (FM, 98MHz, IHF, Mono, 300Ω)1.8µV (10.3dBf)
Usable Sensitivity (FM, 98MHz, IHF, Mono, 75Ω)0.9µV (10.3dBf)
Usable Sensitivity (FM, 98MHz, DIN, Mono)1.5µV (SNR: 26dB)
Usable Sensitivity (FM, 98MHz, DIN, Stereo)50µV (SNR: 46dB)
Sensitivity (FM, 50dB Quieting, Mono)3.5µV (16.1dBf)
Sensitivity (FM, 50dB Quieting, Stereo)43.5µV (38.0dBf)
SNR (FM, Mono)77dB
SNR (FM, DIN, Mono)71dB
SNR (FM, Stereo)71dB
SNR (FM, DIN, Stereo)65dB
Image Interference Ratio (FM, 98MHz)50dB
IF Interference Ratio (FM, 98MHz)75dB
Spurious Interference Ratio (FM, 98MHz)75dB
Amplitude Suppression Ratio (IHF)56dB
Capture Ratio1dB
Effective Selectivity (FM)65dB
Effective Selectivity (FM, DIN)30dB
THD (FM, Mono, 100Hz)0.15%
THD (FM, Mono, 1kHz)0.15%
THD (FM, Mono, 6kHz)0.3%
THD (FM, Stereo, 100Hz)0.25%
THD (FM, Stereo, 1kHz)0.25%
THD (FM, Stereo, 6kHz)0.8%
Cross Modulation Distortion (Mono, IHF)0.1%
Cross Modulation Distortion (Stereo, IHF)0.2%
Stereo Separation (FM, 50Hz)30dB
Stereo Separation (FM, 1kHz)40dB
Stereo Separation (FM, 10kHz)30dB
Frequency Response (FM, ±0.5dB)50Hz-10kHz
Frequency Response (FM, +1/-3dB)30Hz-15kHz
Sub Carrier Suppression40dB
Tuning Range (AM)525kHz-1605kHz
Sensitivity (AM, IHF)18µV/m
Selectivity (AM, 1kHz)20dB
SNR (AM, 80dB/m)50dB
Image Rejection (AM, 1kHz)40dB
IF Interference (AM, 1kHz)40dB
Spurious Interference Ratio (AM, 1kHz)50dB
THD (AM, 80dB/m)0.6%
Output Level (FM, 100% Modulation)450mV
Output Impedance (FM, 100% Modulation)6.5kΩ
Output Level (AM, 30% Modulation)100mV
Output Impedance (AM, 30% Modulation)6.5kΩ
FinishBlack
Channels2 Channel
NotesBlack variant of the CR-420/E. "L" dropped from CR-420BL model number shortly after introduction. Not to be confused with UK market CR-420/B.