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Pioneer SX-750 receiver

 Advanced, High Power AM/FM Stereo Receiver with Tonal Quality-Oriented Design Features.

For a practically-prieced integrated receiver, Pioneer's SX-750 delivers an astonishing amount of state-of-the-art. Perfection. Conventionally, receivers have been considered inferior in terms of performance to integrated amplifiers and independent tuners. But the SX-750 is bound to after this convention. Its pre-amplifier, power amplifier and tuner sections give first-rate performance specifications, the equal in many respects to separate components.
There is an abundance of power: continuous power output of 50 watts per channel min. RMS at 8 ohms, from 20 to 20,000 Hz with no more than 0,1% Total Harmonic Distortion. Other design features contribute to the unit's overall stability and sensitivity. The input/output terminals and circuits of the pre-amplifier/tuner sections are laid out on one large printed circuit board, a process that eliminates shielded input cords and enhances overall tonal quality. The front end uses a dual gate MOS type FET and a 4-gang variable capacvitor for its high sensitivity and selectivity. The IF section combines up-to-the-minute circuits and differential amplifier ICs for its high signal/noise ratio and low distortion.
The SX-750 by Pionner: innovative, attractive, value-packed - another model of efficiency in receiver design.
Specifications
Amplifier Section
Continuous Power Output (both channels driven, 20-20,000 Hz)
50 watts per channel at 8 ohms
60 watts per channel at 4 ohms
Total Harmonic Distortion (20-20,000 Hz, from Aux)
Continuous Rated Power Output :  No more than 0,1%
25 watts per channel power output (8 ) :  no more than 0,05%
1 watt per channel power output (8 ) :  no more than 0,05%
Intermodulation Distortion (50 Hz :7 kHz =4:1, from Aux)
Continuous Rated Power Output :  No more than 0,1%
25 watts per channel power output (8 ) :  no more than 0,05%
1 watt per channel power output (8 ) :  no more than 0,05%
Damping Factor (30 Hz - 20 kHz) :  30
Input Sensitivity/Impedance:
Phono :  2,5 mV/50 k
MIC :  5 mV/50 k
Aux :  150 mV/50 k
Tape Play 1, 2 :  150 mV/50 k
Phono Overload level (T.H.D. 0,1%):  200 mV (1 kHz)
Output Level/Impedance:
Tape rec 1, 2 :  150 mV
Tape Rec 2 (DIN) :  30 mV/80 k
Speaker :  A, B, A+B
Headphones:  low impedance
Frequency Response
Phono (RIAA eq.) :  30 Hz - 15,000 Hz ±0,2 dB
Aux, Tape Play :  10 Hz - 50,000  Hz +0 -1 dB
Tone Control
Bass :  +8 dB, -7 dB at 100 Hz
Treble :  +9 dB, -7 dB at 10 kHz
Filter High :  6 kHz (6 dB/oct)
Loudness Contour (vol. Set at -40 dB ):  +6 dB at 100 Hz , +3 dB at 10 kHz
Hum and Noise (IHF, short circuit, A network, rated power)
Phono :  70 dB
Aux, Tape :  90 dB
FM Tuner Section
Usable Sensitivity
Mono :  10,7 dBf (1,9 µV)
Stereo :  19,0 dBf (9,8 µV)
50 dB Quieting Sensitivity
Mono :  17,2 dBf (4,0 µV)
Stereo :  39,2 dBf (50 µV)
Signal-to-Noise Ratio at 65 dBf
Mono :  72 dB
Stereo :  67 dB
Distortion at 65 dBf MONO:
0,15% at 100 Hz
0,15% at 1 kHz
0,4% at 6 kHz
Distortion at 65 dBf STEREO:
0,3% at 100 Hz
0,3% at 1 kHz
0,4% at 6 kHz
Frequency Response:  30 Hz - 15,000 Hz +0,2 -2,0 dB
Capture ratio:  1,0 dB
Alternate Channel Selectivity:  80 dB
Spurious Response Ratio:  90 dB
Image Response ratio:  80 dB
IF Response Ratio:  100 dB
AM Suppression ratio:  55 dB
Muting Threshold:  14 dBf (2,8 µV)
Stereo Separation:  40 dB (1 kHz), 30 dB (30 Hz - 15 kHz)
Subcarrier product ratio:  62 dB
SCA Rejection ratio:  62 dB
Antenna Input:  300  (balanced), 75  (unbalanced)
AM Tuner Section
Sensitivity
300 µV/m IHF, Ferrite antenna
15 µV IHF, externa antenna
Selectivity:  35 dB
Signal-to-Noise Ratio:  50 dB
Image Rejection:  40 dB
IF Rejection:  65 dB
Antenna:  built-in Ferrite Loopstick antenna
Semiconductors:  42 Transistors; 40 Diodes; 7 ICs; 1 FET
Power Requirement:  120 V, 220-240 V, 50/60 Hz
Power Consumption:  160W, 350 W (max)
Dimensions (W x H x D):  480 x 149 x 371 mm (18-7/8" x 5-7/8" x 14-5/8")
Weight (net):  13,7 kg (30 lb 2 oz)

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