Stereo Receiver with
DC Power Amplification
DC Power Amplifier
"DC with a
Difference" Power Amplifier Pioneer Solves the TIM Problem
The adverse effects
of Transient intermodulation Distortion, or TIM, are devastating to the
delicate waveforms which make up musical signals on their way to your speakers.
TIM accounts for the "muddy" quality of the music you reproduce
through conventional audio amplifiers, those with the old-fashioned AC circuit
configuration using capacitors in their NFB or Negative Feedback loops.
Pioneer's "DC
with a Difference" power amplifier circuity found in our best amplifiers
and receivers solves the TIM problem. Other forms of distortion, too, are
eliminated by the fact that we use no phase-dalying capacitors in the NFB
loops, but - and this is important - we retain the capacitors in the inputs.
Advantages include;
Connected speakers
are protected from DC-caused breakdown without the assistance of an overly
elaborate (and unnecessarily expensive) special protection circuit.
Tonal quality is not
harmed by DC in any way.
Our use of selected
input capacitors ensures that tonal quality is maximized at all times over the
widest possible frequency range.
Low-frequency
transient current, generated inside the preamp section when the unit is turned
on and off, is eliminated. Noise is entirely avoided.
Musical quality is
never threatened when you play warped records.
Power Amp Circuitry,
Supply and Protection
The power output
section circuitry of the SX-880 has a current-mirror-loaded differential amp
input and a constant-current-loaded, Darlington-connected, direct-coupled OCL
output. Two discrete power transistors in each channel are supplied from a
large transformer and two 15,000 µF capacitors to ensure plentiful reserve for
maximum dynamic range. A large heat-sink, and a newly-developed Pioneer IC
(PA-3004), are among the sophisticated touches which guarantee stability and
full protection. The IC, in fact, not only safeguards speakers and circuitry
from abnormal DC potentials at amp output terminals, it serves also as a muting
device to and power on/off noise. The circuit is entirely self-restoring
Twin Power Meters:
Instant-by-Instant Readout of Left/Right Chanel Power Delivery
Here are two
functional meters which more definitely , not "just for show". You
can drive your speaker systems at their best-sounding, best-performing levels
by observing the logarithmically-compressed scales of the twin power meters on
the SX-880. they display instant-by-instant readouts of the power output in
each channel over a range of 0,01 to 120 watts each.
Pioneer-Exclusive IC
for Stereo Demodulator
The PA-101A, an
integrated circuit with astonishing capabilities, is another example of how
Pioneer's leadership in hi-fi technology benefits you. In the FM section of the
SX-880, this remarkable IC serves as a part of the PLL stereo multiplex
demodulator.
But it also contains
a very special device to automatically cancel the 19 kHz FM pilot signal; if an
ordinary filter were used for this job, it would severely limit frequency
response in the highs. So, instead of the typical 15 kHz or lower cut off, you'll
hear clean highs with flat response up to 20 kHz for truly hi-fi results.
Low-Pass Filter with
23 kHz Cut-Off
Since all 19 kHz
signal components are cancelled by the Automatic Pilot Signal Canceller,
mentioned above, the low-pass filter following the IC is required to filter out
only sideband components. In the 23 kHz to 53 kHz range, on the main carrier.
Thus audio range is never squeezed nor lopped off at the top.
High FM Sensitivity;
Not Just a Promise
The high 1,8 µV
sensitivity of the FM section in the SX-880 is not just a meaningless
specification, nor is it an empty promise. You'll pull in the station you want
no matter how distant its transmitter or weak its signal, and enjoy the highest
possible sound quality in the bargain. Circuitry in the FM front end includes a
three-transistor configuration with a dual-gate MOSFET in the first stage.
FM IF Amplifier;
Excellent Phase Characteristics
Another
state-of-the-art. IC is used to achieve sufficient gain and beter limiter
characteristics in the FM IF amplifier of the SX-880. it is circuited between
three two-pole ceramic filters which have excellent phase characteristics. One
indicator of the superior performance of this design is found in the high
capture ratio of 1,0 dB or better.
Superior
Distortion/Noise Specifications for Better Listening
The three important
functions of the Pioneer-exclusive IC in the FM tuner of the SX-880 are IF
amplification, muting and FM discrimination. Proof of the ICs extraordinary
performance is found in the listening. Distortion is a low 0,07% (mono), 1 kHz,
65 dBf. And the noise factor, expressed as an 80 dB or better Signal-to-Noise
Ratio at 65 dBf, cannot be bettered in any other receiver in this price range.
Pleasing AM Sound;
High Sensitivity and Signal-to-Noise Ratio
Pioneer has lowered
noise, sharpened sensitivity and cleaned up low-frequency response to make AM
pleasantly listenable. An IC and a newly-designed AM ferrite bar antenna are
among the touches which raise sensitivity to 300 µV/m and the Signal-to-Noise Ratio
to an excellent 50 dB.
Low Distortion
Preamp
Phono Equalizer;
Definitely High Fidelity Performance
Hi-fi purists still
insist that the disc record is the only "true" musical medium for
wide dynamic range and realistic Frequency Response . Reproducing disc-recorded
musical signals on the RIAA
Equalization curve
over the widest possible frequency range is possible in the SX-880 thanks to
the use of a voltage-proff IC, very low-error resistors and capacitors and
other top-quality parts. Phono overload is 200mV at 1 kHz, with only 0,05%
T.H.D. or less.
Capture Ratio Tone
Control: "OFF" Positions Ensure Ruler-Flat Response
The Bass and Treble
tone controls each have a center-clicked position marked "OFF" which
doubles as a "defest" to ensure a ruler-flat response. The tone
control amp is of the Capture Ratio type for ideal response, low noise and low
distortion. There is also a Capture Ratio-type Subsonic Filter with a low-cut
frequency of 15 Hz, 6 dB/ot.
A Complete Music
Control Center
You'll appreciate
the versatility of the SX-880 all the more with use. The simple-to-operate
controls include:
Tape
Monitor/Duplicating switches, permitting monitoring of Tape-1 or Tape-2,
dubbing from either deck to the other (even as you listen to Source), and
direct recording into either or both decks from Source
Speaker Select
switches, independent off/on pushbuttons for System A and B
FM Muting switch to
end inter-station tuning noise
Mode Switch for
Stereo or Mono
Balance switch has
click-stop in center
Loudness switch for
natural response at low volume
Twin Tuning Meters,
in addition to Left/Right-channel Power Meters, for accurate AM/FM Tuning
LED
indicators for AM, FM, Phono, AUX, and Stereo FM
Attractive
Walnut-Grained Vinyl Cabinet
Specifications
Amplifier Section
Continuous Power
Output:
60 watts per channel at 8 Ω (20 - 20,000 Hz, 0,05% T.H.D.)
60 watts per channel at 4 Ω
(20 - 20,000 Hz, 0,08% T.H.D.)
Total Harmonic
Distortion no more than 0,05% (continuous rated power output)
Intermodulation
Distortion: no more than 0,05%
(continuous rated power output)
Damping Factor: 30
input
Sensitivity/Impedance:
Phono : 2,5 mV/50 k Ω
AUX: 150 mV/ 50 k Ω
Tape Play 1, 2 : 150 mV/50 k Ω
Phono Overload
Level: 200 mV ( 1 kHz T.H.D. 0,05%)
Output
Level/Impedance
Tape Rec 1, 2 : 150 mV
Speakers: A, B, A +B
Headphones: Low impedance
Frequency Response
Phono (RIAA EQ)
: 20 to 20,000 Hz ±0,2 dB
AUX, Tape Play
: 5 to 80,000 Hz +0 -1 dB
Tone Controls:
Bass : +8 dB
-7 dB at 100 Hz
Treble : +7 dB -6 dB at 10 kHz
Loudness
Contour: +6 dB (at 100 Hz) +3 dB (at 10
kHz)
Filter Low: 15 Hz (6 dB/oct)
Hum and Noise (IHF,
short-circuited A network, rated power)
Phono : 76 dB
AUX, Tape Play
: 95 dB
FM Tuner Section
Usable
Sensitivity:
Mono : 10,3 dBf (1,8
µV)
50 dB Quieting
Sensitivity:
Mono : 16,2 dBf (3,6 µV)
Stereo : 37,0 dBf (39 µV)
Signal-to-Noise
Ratio
Mono : 80 dB
Stereo : 72 dB
Distortion (at 65
dBf)
Mono : 0,07% (at 100 Hz ); 0,07% (at 1 kHz); 0,12%
(at 6 kHz)
Stereo : 0,15% (at 100 Hz); 0,15% (at 1 kHz ); 0,25%
(at 6 kHz)
Frequency
Response: 30 to 15,000 Hz +0,2 dB -0,8
dB
Capture Ratio: 1,0 dB
Alternate Channel
Selectivity: 75 dB
Spurious Response
Ratio: 65 dB
Image Response
Ratio: 65 dB
IF Response
Ratio: 90 dB
AM Suppression
Ratio: 50 dB
Muting
Threshold: 19,2 dBf (5 µV)
Stereo
Separation: 45 dB (1 kHz); 35 dB (30 Hz
-15 kHz)
Subcarrier
Production Ratio: 55 dB
SCA Rejection
Ratio: 65 dB
Antenna Input: 300 Ω
(balanced); 75 Ω (unbalanced)
AM Tuner Section
Sensitivity: 300 µV/m (IHF, ferrite antenna); 15 µV (IHF,
ext. Antenna)
Selectivity: 26 dB
Signal-to-Noise
Ratio: 50 dB
Image Response
Ratio: 40 dB
IF Response
Ratio: 40 Hz
Antenna: Built-in ferrite loop stick antenna
Semiconductors: 5 FETs; 9 ICs; 37 Transistors; 37 Diodes
Power
Requirements: 110/120/220/240 V 50/60 Hz
Power
Consumption: 190 W (UL), 340 VA (CSA)
Dimensions (W x H x
D): 480 x 140 x 320 mm (18-7/8" x
5-1/2" x 12-5/8")
Weight: 12,2 kg (26 lb 14 oz)
