Este é o Sansui G4700 de final dos anos 70.
Fiquei impressionado com o som quente e potente que produz, parece ter bem mais do que 50 watts por canal.
Globalmente, a série G-X700 da Sansui foi notável, tinha alguns dos receptores mais bonitos dos finais dos anos 70, e embora o G4700 estivesse no fundo da linha, ainda produzia uns respeitáveis 50 watts por canal e vendia por cerca de 400-450 dólares.
O painel frontal do G-4700 é lindíssimo, bem iluminado, tem um LCD brilhante que mostra a frequência da estação selecionada e medidores de potência em LEDs.
Globalmente, o Sansui G-4700 é um óptimo receptor com um som puro e limpo. Os seus 50 WPC têm potência suficiente e possui todas as outras características que provavelmente necessitará.
Video em breve:
Audio Section
Power Output (min. RMS, both channel driven, 20-20,000 Hz, no more than 0,05% T.H.D.): 50 watts per channel into 8 ohms
Load Impedance: 8 ohms
Total Harmonic Distortion : less than 0,05% at or below rated min. RMS power output
Intermodulation Distortion (70 Hz : 7 kHz = 4 : 1 SMPTE method): less than 0,05% at rated power output
Frequency Response ( Overall from Tape/AUX, at 1 watt): 10 Hz to 70,000 Hz, +1,0 dB, -2,0 dB
RIAA Curve Deviation (Phono, 30 Hz – 15 kHz): +0,5 dB, -0,5 dB
Damping Factor (1 kHz, both channel driven): 30 into 8 ohms
Input Sensitivity/ Impedance:
Phono 1 : 2,5 mV/47 k Ω (max. input capability : 200 mV at 1 kHz, less than 0,5% T.H.D.)
Aux, Tape : 150 mV/47 k Ω
Output Level (at 1 kHz):
Tape Rec (Pin jacks) : 150 mV
Hum and Noise (short-circuit, A-network):
Phono : 76 dB
Aux, Tape : 95 dB
Channel Separation (at 1 kHz)
Phono : 50 dB
Aux, Tape : 50 dB
Controls
Bass : ±10 dB at 50 Hz
Trebele : ±10 dB at 10 kHz
Susbsonic Filter: -3 dB at 18 kHz (6 dB/oct)
High Filter : -3 dB at 3 kHz (6 dB/oct)
Loudness (Volume control -30 dB position): 9 dB at 50 Hz ; 6 db at 10 kHz
FM Tuner Section
Tuning Range: 88 to 108 MHz
Usable Sensitivity:
Mono [IHF/DIN]: 10,8 dBf (1,9 µV) / 1,2 µV
Stereo IHF : 19 dBf
50 dB Quieting Sensitivity:
Mono : 15 dBf
Stereo : 38 dBf
Signal-to-Noise Ratio (at 65 dBf):
Mono : 75 dB
Stereo : 70 dB
Distortion (at 65 dBf) Mono :
at 100 Hz : less than 0,18%
at 1 kHz : less than 0,15%
at 6 kHz : less than 0,25%
Distortion (at 65 dBf) Stereo :
at 100 Hz : less than 0,3%
at 1 kHz : less than 0,25%
at 6 kHz : less than 0,3%
Alternate Channel Selectivity (at 400 khz): 50 dB
Capture Ratio: 1,0 dB
Image Response Ratio: 48 dB
Spurious Response Ratio: 70 dB
IF Response Ratio: 90 dB
Stereo Separation:
30 dB at 100 Hz
40 dB at 1 kHz
28 dB at 10 kHz
Frequency Response: 30 to 15,000 Hz
Antenna Input Impedance: 300 Ω (balanced); 75 Ω (unbalanced)
AM Tuner Section
Tuning Range: 530 to 1,600 kHz
Usable Sensitivity (bar antenna): 50 dB/m (300 µV/m)
Selectivity (±10 kHz): 33 dB
Signal-to-Noise Ratio: 46 dB
Distortion (at 30% Modulation, 80 dB/m): less than 0,5%
General Section
Power Requirements: 100, 120, 220, 240 V, 50/60 Hz
Power Rated Consumption: 160 watts, 190 VAC
Dimensions (W x H x D): 433 x 155 x 355 mm (17-1/16″ x 6-7/8″ x 14″)
Weight: 8,6 kg