Pioneer SA 9900 Brochure

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PIONEEI?

Top-of-the-Iine stereo integrated amplifier with state-of-the-art technology
and advanced features.

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CLASS-A OPERATION EOUALIZER WITH 3-STAGE
DIRECFCOUPLED SEPP DESIGN USING DUAL POWER
SUPPLV AND FIRST-STAGE FET-EQUIPPED
DIFFERENTIAL AMPLIFIER

The highly sophisticated equalizer of the SA»9900 employs
low-noise FET (Field Effect TranSIstor) in its first»stage differ-
ential amplifier to specifically eliminate that area of odd-
numbered harmonic distortion which is most irritating to the
human ear. This. and the equalizer's low-neise performance.
enhances sound transparency at low-volume listening levels.
In the second-stage voltage amplification section, a constant
current load is used to obtain linear response and low distor-
tion. It contributes to the excellent phase characteristics in
the low sound range and to transient response overall. The
SEPP type output stage is distinguished by its highly efficient
use of supply voltage. By applying a large amount of drive
current. the equalizer performs in Class-A operation clear
down to the low load drive (around 5k ohms) point. Further. by
applying an extra-high 14W DC (total 96V) supply to this
stage, the PHONO overload level is extended to 500mV (1 kHz
RMS, THD 01%). providing the super-wide dynamic range
necessary for true high fidelity record reproduction.

PRECISE RIAA EQUALIZATION WITHIN 3:0.2dB

ln order to minimize deviation from the FllAA standard equali-
zation curve, Pioneer employs precision circuit elements such
as micro-tolerance metal film resistors and styrol capacitors
in this equalizer. As a result. RIAA equalization is within
10.2dB for greatly enhanced high-fidelity performance.All the
information found in the record groove and passed on to the
equalizer is handled with precision.

PHONO-Z INPUTS FEATURE LEVEL ADJUSTMENT AND
INPUT IMPEDANCE SELECTOR

A special level control is provided
for the PHONO-2 source input cir-
cuit. With it you can control input
sensitivityfrom 2.5mV to 10mV (OdB
to -12dB). In the OdB to -6dB
range. level is adjusted through a
NFB (negative feedback) circuit
while in the -6dB to -12dB range it is controlled by the
output attenuator. This means that in the NFB circuit range.
PHONO overload level is doubled to 1V (1kHz FlMSl. Discs
cut at relatively high levels. and cartridges with high output
voltages. can be used without clipping or distortion. The level
control has many uses, among which is to allow comparison
of different kinds of phono cartridges for in-system perfor-
mance suitability. Additionally. there is a 4-position input
impedance selector for the PHONO~2 input circuit. allowing
you to select the proper impedance (35k ohms. 50k ohms.
70k ohms or 100k ohms) to best match your cartridge.

3-STAGE DIRECT-COUPLED TONE CONTROL AMPLIFIER
WITH DUAL POWER SUPPLY SVSTEM AND FET-EQUIPPED
DIFFERENTIAL AMPLIFIER

Pioneer's revolutionary amplifier design concept is also
applied to the tone control amplifier section. lt features a dual
:48V power supply system (total 96V) and an FET-eqUIpped
first-stage differential amplifier with the main emphasis on
linearity, low distortion and transient response. In the differ-
ential amplifier section, the dual power supply applies 100%
DC negative feedback so that DC stability is extraordinarily
high, ensuring that when switches are altered you hear no
click noises.

PIONEER'S UNIQUE TWIN TONE CONTROL SYSTEM

You have approximately 5,929 different tonal combinations at
your command by employing the MAlN and SUB controls on
the BASS and TREBLE tone controls. SUB control allows you
to boost or cut the frequency in both low and high frequency
ranges without exerting influence on the midrange sound.
The SUB controls may be used independently or combined in
function with the MAIN controls. Both MAIN controls have 11
steps of 1.5dB each. covering a range of -7,5dB to +7.5dB
(BASS optimum: 100HZ; TREBLE optimum 10.000Hz), The