Pioneer sa 9900 owners manual

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INTEGRATED STEREO AMPLIFIER

SSA-9900

OPERATING INSTRUCTIONS cu

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Features
Stereo System Composition ............. 3
Connection Diagram ........... . ......

Connections
Front Panel Facilities
Before Operation ..................... 1

Operation .......................... l

CONTENTS

Employing Tape Deck ...... . . . ........ 11
Effective Operation t , . . .......... . . . . . 12
Employing PRE OU'l & POWER lN Jacks. . 14
Specifications ....................... 15

Conditions Frequently Mistaken for
Malfunction ....................... 16

FEATURES

Superior DC Balanced Circuitry

Differential amplilier circuits are employed in the equalizer,
tone control, and power amplifier sections. taclt amplifier
section is supplied by a balanced power supply system that
assures excellent DC balance and stability, while nearly
eliminating switching noise during control operation,

High Power Output at Low Distortion

DC stability is enhanced by the 2-stagc dilterential ampli-
fier and pure complementary OCL circuits are employed
for direct coupling at all stages. Constant current load cir-
cuits are used in 2 locations and a large negative feedback is
applied due to the high gain circuit composition. A wide»
band high power output can be obtained with broad
dynamic range and low distortion.

Precise RlAA Equalization

Ultra-precision grade mctuliaed film resistors (sputtering
process) and styrene capacitors are combined as equalized
elements. Deviation from the RIAA curve has been reduced
by 10.2dB in the frequency range of 30H1 ~ l5kl II. An YET
is employed iii the lst stage dillerenlial amplifier and by
adopting a 3-stage direct coupled SEPP circuit, input
impedance variation due to frequency is minimized, High
stability is attained at low distortion, in addition to a greatly
expanded acceptable input level. Distortionless disc reprn~
duction can therefore by cnioycd, even with a high output
cartridge and a dynamic music source containing large peak
inputs,

Delicate Tone Adiustments

The Pioneer developed twin tone control circuit is applied
to the conventional Bass and lrcble controls, Superiow and
super~high bands can be individually adiustid to provide
delicate compensation for such factors as room acoustics
and speaker and cartridge frequency characteristics. A Tone
switch is also provided which can be used to compare the
effectiveness of the tone controls.

Reliable Electronic Protection Circuit

In event of speaker shorting or mallunction in which DC is
applied to the output, speakers and transistors are reliably
guarded by an electronic protection circuit. This circuit also
acts as a uniting circuit when the power switch is turned on
and oil.

Accurate Volume Control Expands Adjustment
Range

The Volume control is equipped with a precision allcnu-
atur of the type employed in measuring instruments and
other high reliability equipment, Volume adiustrncnt can be
easily performed when listening at low volume levels, tem-
porarily reducing the volume, or employing a low input
level (high gain) power amplilicr. The. volume adiustment
range can also be expanded by employing the volume
control and attenuator switch in combination.

Phono 2 Jacks Provided with Impedance Selector &
Level Control

A convenient impedance selector switch [35kf2, SORQ,
70kfl, IOORQ) and level control (0 ~ -l2dB) are provided
for the lHONO 2 iacks for matching cartridge output
characteristics, comparison listeninvH etc.

Tape Switch for Easy Tape Duplication

By connecting '2 tape decks, the desired program only from
a previously recorded tape can be edited and re-recordcd.
lite Duplicate switch also lets open reel tape be duplicated
onto cassette tape.

Audiophile Functions Incorporated

A PRtt'POWtR AMP selector switch plus PRE DUI and
POWER IN racks are included. An external power amplifier
can be connected to the PRE OUT iacks to allow listening
comparison and power amplification, This feature can also
be employed tor composing a rnulti-amplifier or 4 channel
system. A single SAQJOU can thus he used to set up various
kinds of audio systems.