Pioneer qx 9900 brochure

Page 1

PlONCER'

X-SSOD

The ultimate tour-channel stereo receiver, with total cap

Iity matrix decoding circuitry,

large powe output and built-in reverberation unit.

Four-channel ltnally comes at age with this verulile receiver
trorn Pioneer. an outstlnding achievement unusual in both
capability and tremendous power output. Featuring a unique
matrix decoding circuit. that reproduce: all regular matrix
records. as well u a second type at decoding circuitry tor
the SO matrixed type at records. the (IX-9900 is simply the
most complete receiver lor tour-channel novr available today
In addition to its matrix decoding capability. the 0X-9900 may
also be used lot dllcreta tourechannel reproduction as well
as more conventional twcrchannel reproduction. lu FM tuner
characteristics are equally superb. distinguished by excellent
sensitivity at 1.8 V (INF), a wide linear FM dial scale. and
superb selectivity at more than TDdB (lHF). There are no less
than six easy~to-read meters contained in the cit-9900. tour
level indicator; tor judging the signal output to each channel,
a signal strength mater and center tuning meter tor pinpoint

FM tuning. The receiver's high standards at versatility are
lurlhar exemplified by its built-in reverberation amplitteri
which permits reverberated sound to be selectively added to
either tront or rear speakers. or microphone And because
the OX-QSOD is complete with two microphone inputs. micrc~
phone mixing ls accomplished wrlh eased Completing this
picture at quality. the ((3900 ventures dIrECl»Coupied pure
complementary OCL circuitry. the most advanced circuit
technology now available. and it delivers up to 240 walls at
music power at lohms (iHF). or 30 watts): continuous
power (at Bohms with all channels driven). Careiuily engi-
neered to typically high Pioneer standards. the OX-BEOD Will
give you many years 0! lailhlul musmal reproduction it moves
you into the tasclnating sound world at tour»channel-and
even a btl beyond,

Page 2

GX-SSDD

LINEAR F" DIAL SCALE AND TWO METER TUNING SYSTEH
The FM dial scale at the OX~9900 is the extramrde linear type
that enables precuse selectlvrly at all FM statrons. This out-
standing selectivity is enhanced even more by the rtICluSlUfl
ot a pair OI easytorrcud meters one the signal strength type
the other the center tunrng typo which add immensely to
precrsn station tuning at all tunes

FE'I EN FRONT END
Employed in the lront end section oI the OX~9900 are a low?
norsc FET tlreld ullect transistorl and a two~stage RF circuit
These solid state devices combine to produce an extromel'r
high FM senSItwity {1 EN.
IHF) and lleUVDd Signal to
norse raho (rods: spurious
reiection and crossmodula-
tian re. stance It IS the very
receiver that can match
these outstanding perlorr
mance characteristics.

IF SECTION WITH CERAMIC FILTERS

Ceramic tillers are utilized in both the AM and FM SFCTIWN
ol the OX»9900 to suppress undesirable norse and Inter-starter!
norse, addrng up to extremely sharp selectivity characterrslics
Moreover in the FM IF section, ICS (integrated Circuilsl are
employed to ensure tine selectiwty at more than 7005 INFr
and excellent capture ratio at 2d8 lIHFl

FET-EOUIPPED FM MUTING CIRCUIT

Compared With muting Circuits utilizing ordinary transistorsr
the FM muting CtICUll ol the OX-QQOO reproduces lithe nOlfie
and in tact, optimizes muting cnaracreristics throughout the
FM band Under normal operating condriions the lttJtlttg
swrtch Will be set to the "ON posrlionr so that Irritating :nterA
station noise can be Completely cancelled while tuning To
recuwr: wuuk stations the SWITCH should be sci OFF

HIGH SENSITIVITY AM TUNER SECTION

The AM lunrir section 01 the OX-BBOU matches the FM sectinr
in terms ot seriSitivrty and selectivity It too is equrpped wrth
advanced CrICUIIIy rnciuaing three-gang Vflllflblp capntiior
and ceramic Irlters tor the lF stage An AGC Atitiyna'ic Gain
Cuntrol) Circurt l5 also used to prvwde A! reception wrthuut
reterence to the mtonsrty ot the radio wave, And to assure
quality reception at all times. the unit is equipped wrtn a
movnbln lerrrte coro antenna which can be rotated l'eclv to
obtain maximum senSitiwty under nli conditions

DIRECTACOU'LED PURE CONPLEMENTARV OCL CIRCUIT
DESIGN IN POWER AMPLIFIER SECTION
The power delllEI stage at the OX»9900 is equipped WlHl

tMi wpnrate DC primer Stlflpllfils Ill nluzi leatiiiec Arr all-
Slagr in!e([v[(_rUpleC OCL Lrllllll [rte itirerrtrwliplerl circurt
cm. on "warm it"s! :utiplinq ('dDiH il,ii.\ «Ht! iurrrpl-Jliily (Ilmlt
rater: butwcuri the Vldlildudl stage: and result: iii a super
wide treQJEHCV response (mm ranging lrom near DC to well
beyond the audible some range The entire power banGWidtn
Irorn 510 70 000K] 8 nhrin harmonic distortion less than
L 5 Ioar-cnarneis drive-m is tIrrIlaI Prizeit by rrinrmal
Cislir'tir-n The CXSIQOt) otlem 30 watts it A continumii power
imtpiit with at tour Channelq (ti-wen WI! riairvrirrir distortion
riteo at less than U 5

ADVANCED PROTECTOR CIRCUIT
WITH MUTING FUNCTION

[he OX~9<¥ZM ~2 dirrict cotip'oc power amp trier i< tne key to
msl IVYCV'3VFIWUFIN in stereo perlurrrifinge Oiil Witt this new
ClVClJilV) -t s .rtal that speaker: be piu'eJeU rlelltS u'teir
cancerous DC paletttial which could result iii sound d-hlutllult
and damage to the speakers through overheat no (it lhr: \DICL
Cons [DC s'iucixl To protect apcnxuis and DUWC! lransrstois
Pioneer nas perfected a protector c rcui: that allows Me
advantogns DI direct (nupiing CI'CUIH, tn he: exploited to the
tail The protector c rum is rompowtt (2| 9 tranfiifi'rm t?
Cioces and a power-ielay switch Its. task l; to protect the
speakers lrithr DC sltulll and the DUWI'V trauma-[iris liorti sncrt
Circuits rrr t'ie speaker output terminal: a: well as horn en
cessim uuiient at the output stage Ttii: p'utuclui CllChll also
cllcets riiutirig tor about three secondsaltcr power is switched
cri Additiona ly in the event at dangerous DC potentiai at Me
Ciltput stage, the ailnrontriii amp itrer (lev
'95P» the DC ccntent and starts 0 he rpiay
irrr:_i.t preventing DC lrnnt Inwmg tn the
Speakerc In thn event that short-client?
speaker output terriiinals or xcesswe cuir
rcrrt l: prcucrit a! the uutput :mtge the AC
content l5 deleclezl and [19 protector Circuit
funct-ons to protect the pow-er tranSistors
Finally the muting altect serves to eliminate
unpleasant noise that occurs when convcn
lions amp-fliers are turned on

WIDE DVNANIC RANGE HEAD AMP SECTION
The OXAQQUO employs threerstage leGCl-COLIDPN oniializer
Cirruit And an extra high and ntatrlr- pnwui supp» rsapplieo