FM Front End And FM
IF Section
The quality of these
two sections is decisive for sensitivity, enabling you to get stations whose
signals are weak or weakended by distance or obstacles and for selectivity
which rejects undesirable stations. This is why Pioneer uses field-effect
transistors (FET and MOS-FET) for the first section and variable capacitors
with a minimum of 3 gangs and up to 5 gangs. Multipath switch ensures accurate
antenna mouting for optimum reception.
Multiplex (MPX)
Circuit
Its function is to
separate the right and left channels from the stereo FM signal. This is a very
complex operation and often influenced by temperature and air humidity. The
phase lock loop integrated circuits (PLL) automatically control the stability
of this separation.
Refined Design and
Operation Features
The presentation of
the Pioneer receivers SX-1050 is of a remarkable quality. Pioneer styling is
also legendary, touch the button of a Pioneer and compare to others. Such
production precision is almost incredible. Finally, it's the
power and the variety of possibilities which will enable you to choose.
FM Muting
A built-in muting
circuit effetively eliminates irritating pop and interstation noises during
tuning and detuning on all Pioneer receivers.
AM (Long and Medium
Wave) Reception
AM reception is
often a neglected point on many receivers, and the poor quality of the sound
drivers you back to FM eben when you want to listen to an interesting program
on AM. Not on a Pioneer, thanks to the use of LSI (Large Scale Integrated
Circuits), ceramic filters, and two or
three gang capacitors.
Hign Class Equalizer
And Control Preamplifier
The quality signal
produced by the FM section must be as carefully treated as the signals from the
turntable, the tape recorder, or the cassette deck.
For records the
direct coupled 3 or 4 stage preamplifier equalizers give an RIAA correction
always within ±0.3 dB, and input tolerances of 150 mV to 500 mV assuring good rstitution of the
high and low frequencies and a god dynamics range.
The control preamp
using field effect transistors and integrated circuits (CR type) allows very
delicate control. The SX-1050 have double effect and twin tone control system.
Power Supply and
Protection Of Power Amplifier
The power of the
Pioneer receivers is a real power, always indicated from 20 to 20,000 Hz with
the corresponding maximum distortion. Direct coupled PNP, NPN circuits and Darlington transistorized circuits,
assure this succes. So that this power can be supplied, Pioneer chose oversize
transformers and electrolytic capacitors to provide all the energy necessary
for the lowest frequencies.
Specifications SX-1050
Audio Section
Continuous power:
2 x
170 W (both channel driven at 20 Hz - 20
kHz, 4Ω)
2 x
120 W (both channel driven at 20 Hz - 20
KHz, 8Ω)
THD at
rated output power (DIN), 8Ω: <0,1%
Power
bandwidth (DIN) both channel driven 8Ω: 5 Hz - 40 kHz
Frequency response
at AUX input (DIN): 10 Hz - 50 kHz (+0
dB, -1 dB)
Input sensitivity
impedance:
Phono: 2,5 mV/50 kΩ
Microphone: 6,5 mV/50 kΩ
Tape
monitor, Tuner, Aux: 150 mV/100 kΩ
Bass control (100
Hz): ±10 dB
Treble control (10
kHz): ±10 dB
FM Section (87,5 to
108 Hz)
Sensitivity (DIN):
Mono (26 dB S/N ratio): 1,6 μV
Stereo
(46 dB/S/N ratio): 35μV
Capture ratio: 1 dB
Selectivity (±400
kHz): 80 dB
S/N ratio
(IHF): 78 dB
THD (stereo) 1kHz
(DIN): <0,25%
Frequency response
(DIN): 30 Hz - 15 kHz (+0,2 dB, -2 dB)
Stereo separation 1
kHz (DIN): 45 dB
Subcarrier
suppression: 73 dB
AM Section (525 -
1605 kHz)
Sensitivity
(IHF): 15 μV/m
Selectivity: 40 dB
Dimensions (W x H x
D): 526 x 173 x 454 mm
Weight: 23,4 kg