Pioneer SX-550

 Super-Clean Stereo FM/AM Receiver

How much does good clean electronics circuit design contribute to better tonal quality? Find out by test-listening to the all-new Pioneer SX-550. we've used extra-large, custom-designed integrated printed circuit board in the preamp and tuner sections to almost entirely eliminate shielded wire connections inside. This in turn cuts the loss of vital high frequency signals to practically zero, greatly boosting tonal realism.

 A particularly good RIAA equalization (±0,3 dB) and equally good S/N and dynamic range performance have been achieved in the SX-550's phono equalizer. The CR type tone control circuitry a versatile two-deck tape monitor/dubbing facility, FET and IC equipped FM/AM section (with PLL IC stereo demodulator) and other superior features make the SX-550 still more of a value in its class.

Continuous power output is a super-steady 20 watts per channel , min. RMS, at 8 ohms from 20 to 20,000 Hz, with no more than 0,3% total harmonic distortion. The good, clean design of the pioneer SX-550 inside and out does make a difference. It's a difference you can hear at your Pioneer Hi-Fi system.

Specifications

Power Amplifier Section

Continuous Power Output (both channel driven, 20-20,000Hz): 20 watts per channel at 8 Ω

Total Harmonic Distortion (20 Hz to 20 kHz, from Aux)

Continuous Rated Power Output:  no more than 0,3%

10 watt per channel output, 8 Ω:  no more than 0,07%

1 watt per channel output, 8 Ω:  no more than 0,07%

Intermodulation Distortion (50 Hz : 7 kHz = 4:1 from Aux)

Continuous Rated Power Output:  no more than 0,5%

10 watt per channel output, 8 Ω:  no more than 0,07%

1 watt per channel output, 8 Ω:  no more than 0,1%

Damping Factor (20 Hz-20 kHz):  25

Input Sensitivity/Impedance

Phono : 2,5 mV/50 k Ω

Mic : 7,5 mV/50 k Ω

Aux : 150 mV/50 k Ω

Tape Play 1 and 2 : 150 mV/50 k Ω

Tape Play 2 (DIN) : 150 mV/50 k Ω

Phono Overload level (THD 0,1%):  200 mV (1 kHz)

Output Level/Impedance

Tape Rec 1 and 2 : 150 mV

Tape Rec 2 (DIN) : 30 mV/80 k Ω

Speaker : A, B, A+B

Headphone : Low Impedance

Frequency Response:

Phone (RIAA equalization) : 30 Hz to 15,000 Hz ±0,3 dB

Aux, Tape Play : 20 Hz to 60,000 Hz  +0,5 -1 dB

Tone Control

Bass : +9 dB, -10 dB (at 100 Hz)

Treble : ±8 dB (at 10 kHz)

Loudness Contur (Volume Control at -40 dB):  +6 dB (100 Hz); +3 dB (10 kHz)

Hum and Noise (IHF, short-circuited, A network, rated power)

Phono : 70 dB

Aux, Tape Play : 90 dB

FM Section

Usable Sensitivity [Mono/Stereo]:  11,2 dBf (2,0 µV) / 20,0 dBf (5,5 µV)

50 dB Quieting Sensitivity [Mono/Stereo]:  18,3 dBf/(4,5 µV) / 39,2 dBf (50 µV)

Signal-to-Noise Ratio at 65 dBf [Mono/Stereo]:  70 dB/ 65 dB

Distortion at 65 dBf

100 Hz [Mono/Stereo] : 0,15% / 0,3%

1 kHz [Mono/Stereo] : 0,15% / 0,3%

6 kHz [Mono/Stereo] : 0,4% / 0,4%

Frequency Response:  30 Hz to 15,000 Hz  +0,2 -2,0 dB

Capture Ratio:  1,0 dB

Alternate Channel Selectivity:  60 dB

Spurious response Ratio:  75 dB

Image response Ratio:  65 dB

IF Response ratio:  90 dB

AM Suppression ratio:  50 dB

Muting Threshold:  14 dBf (2,8 µV)

Stereo Separation:  40 dB (1 kHz), 30 dB (30 Hz - 15 kHz)

Subcarrier Product ratio:  40 dB

SCA Rejection Ratio:  40 dB

Antenna Input:  300 ohms balanced / 75 ohms unbalanced

AM Section

Sensitivity IHF [ferrite /external antenna]:  300 µV/m  / 15 µV

Selectivity:  35 dB

Signal-to-Noise Ratio:  50 dB

Image Rejection:  40 dB

IF rejection:  65 dB

Antenna:  Built-in Ferite Loopstick Antenna

Miscellaneous

Semiconductors:  3 FET; 5 ICs; 28 Transistors; 21 Diodes

Power Requirements:  110 -120 V, 220-240 V,  50/60 Hz

Power Consumption:  UL; 80 W, 185 W (max); CSA; 155 VA

Dimensions (W x H x D):  448 x 141 x 307 mm (17-4/8 x 5-9/16 x 12-1/16 inches)

Weight:  9,4 kg (20 lb 11 oz) net