Pioneer sa 706 owners manual

Page 1

STEREO AMPLIFIER

A-7DE

OPERATING INSTRUCTIONS

S

3/6

HG

GDPION

SA»706 are designed to operate 220V or 240V (HG
model) main and 110V, 120V, 220V or 240V (S model)
main. Before turning on the power, please confirm the
line voltage setting indicated on the rear of your unit
corresponds to the supply voltage in your area; if not,
change the setting as described in IMPORTANTvLINE
VOLTAGE on page 12.

SA-706/HG provides the DIN connector on the rear panel
so it can be connected to the tape deck for recording/
playback by using the DIN cord.

CONTENTS

Features ............................. 2
Stereo System Composition .............. 3
Installation Cautions ........... . ....... 3
Connection Diagram .................... 4
Connections .......................... 5
Front Panel Facilities . . . . . . . . . . . ; ....... 6
Before Operation ...................... 7
Operation ............................ 7
Using the Tape Decks ................... 8
Using the AUX Input Jacks .............. 9
Conditions Frequently Mistaken for

Malfunction ........................ 10
Specifications ......................... 1 1
Important-Line Voltage ................ 12
Schematic Diagram ................ Insertion

M

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FEATURES

Low-distortion, Stable-output Power Amplifier

The power amplifier stage adopts a high-reliability npn,
pnp silicon power transistor-based differential first»stage
current mirror load, all-stage direct-coupled pure comple-
mentary OCL circuit.

Continuous power output is 60watts* per chan-
nel, min., at 230th from 20Hertz to 20,000
Hertz with no more than 0.04%total harmonic
distortion.

This is an output which is more than sufficient for first-
rate reproduction of music so the SA-706 deliversa powerful
and yet high-fidelity stereo reproduction for your enjoy-
ment. Moreover, the first-stage differential amplifier which
employs two power transistors and the constant current
circuit assures an stable operation stable even in the face of
fluctuations in the power supply voltage and external
temperature.

Equalizer Amplifier with a Tip-top Signal-to-noise
Ratio

The equalizer amplifier features a 3-stage direct-coupled
circuit which adopts |ow»noise transistors in the first
stage. The S/N ratio thereby achieved is an excellent
86dB (lHF-A), the equalizer elements employ only those
parts which have undergone rigorous selection, and the
deviation in the 20Hz-20kHz frequency band is kept down
to 10.2dB. All these features add up to the reproduction of
records which is faithful to the original sound.

A high voltage is supplied from the dual positive and
negative power supplies and a maximum allowable phono
input of 180mV (1 kHz) is obtained with respect to a rating
of 2.5mV. This means that you can sit back and listen to
almost distortion-free record play when you use high-
output catridges or when the music source is punctuated by
high signal peaks.

Built-in Protection Circuitry Employing Relays and
Electronic Circuits

The protective circuitry. which is essentially a combina-
tion of electronic circuits and relays, protects the speakers
and power transistors against damage in the event of a
malfunction. There is also a muting circuit which eliminates
unpleasant surge noise during the on-off operation of the
power switch.

Power Meters that Allow the Output Level to be
Read Out Directly

The two large-sized meters located in the center of the
front panel incorporate logarithmic compression scales in
order to display the output level across a wide range from
0.01W to 100W. These handy meters mean that you can
directly read out the power level from 0.01W up to the
maximum output level of the SA-706 at an 8-ohm
impedance

Two Sets of Speaker Systems can be Connected

The SA-706 comes with two sets of speaker terminal
and a speaker selector switch so you can compare the sound
through two different sets of speakers or place a second set
in another room. Another useful facility is the headphones
jack which allows you to listen to music in private late at
night through your stereo headphones.

Duplicate' Switch for Easy Tape Editing

This one-touch duplicating switch allows you to do a
whole host of things with tapes. For example, with two
tape decks, you can edit tape programs which you yourself
have recorded in accordance with your own personal prefer-
ence. Also, you can duplicate open-reel tape deck record-
ings on a cassette tape deck.

Functionally Streamlined and Attractively
Designed Front Panel

The functionally designed front panel is made for easy
operation Its two large-sized output meters in the center as
well as its knobs and switches which respond lightly to the
touch make operating the SA-706 a real pleasure.

The design matches that of other Pioneer hi-fi stereo
components. Just one look is enough to reassure you
that you have bought the highest performance and most
attractively designed components available on the market.

* Measured pursuant to Federal Trade Commission 5 Trade Regulation rule on Power output Claims for Amplifiers.