Sansui QRX 5001 Brochure

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ALL-SOURCE FM/AM 4- CHANNEL RECEIVER

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Sansui's leadership in the held at 4- FM broadcasts. and our improved built volume and tone controls. and the sim-
channel equipment is easy to explain~ lrom-scratch CD41 demodulator tor CD-4 plitied program source selectors. take
we make the best there is. or Ouadradisc records the complications out ol quadraohonics
Prove it with your own ears Hear our And thanks to its 08 Synthesizer. you lC-eouioped FM/AM tuners. unique
newest all-source 4~channel FM/AM also enioy convincmg 4-channet sounds PLUS BACK Circuit for 2«channel use.
receiver. the versatile ORX-SOOI. Despite lrom most 2-channel sources. and many other advances make the
its reasonable cost it has every facility you All controls and circuits in the DEX-5001 another classic lrom the 4-
need to enjoy any d-channel program ORX-SOOI make the most at the sound channel leader - Sansui. ol course.
source-our own OS'vario-matrtx decoder lield realism possible with 4-channel. Its
for OS and 80"matrix records. tapes and easy-louse lront and back balance. -os m Sansui "so TM (:85 lm: term w .IVC Inc

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Enjoy any and all 4-channel sources
with the versatile QRX-5001.

4~CHANNEL

DECODER SECTIO N

OS Varlo Matrix Decoder

Sansui was the tirst t0 hertent and market
(in l970'i a total dechannet matrix encoding/
decoding system called OS This unicue
system teatures a square decoding matrix with
plus/minus 90" phase shifters, which means
there is no loss or mislocalion cl any part ol
the onginal sound lield inlormation Records
proouced and played via OS bring you predise
spund-image location over a 360° listening area

the 05 System also teatures the new IC-
oawpoed OS vario-matrix to bring tnterchannei
separation to a par With discrete dachannel
tape Not too technically speaking the OS
vano-matrix constantly controls the operating
parameter (or electronic shade") oi the OS
decoding matrix. emphaszing the directionality
ot wnichever sorrnd is loudest at any given
moment

Since only the crosstalk is cancelled not the
Signals the content and expression ol music
and other sounds on not change This means
that 03 guarantees top quality high-lidelity
sound reproduction at all times, with no lower
ing ol standards in respect to dynamic range.
distortion_ lroduenCy response, etc

The OS vane-matrix circuit has two additional
advantages in the. Phase Matrix mode it pro-
perly decodes spurcos made with 50 matrix
system and in its 03 SyntheSizer mode.

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you hear conwncind 4-channot sounds

trom conventional 2-channet

records. tapes or FM stereo broadcasts con
training, as most do. any "hidden" phase inlor-
mation The versatility ol the OS vane-matrix
and the incorporation of 3 CDA demodulator
in the onxsom give it total tchannel capabi
lilies unmatched by any other receiver in its
price range.

Pushbutton Function Selectors

The Six pushbuttons below the dialplato on
the iron: paneJ give you instant selection 01 all
at the receivers many modes

2-CH DIRECT sends regular stereo signals
to the lront two speaker astems

PLUS BACK sends regular stereo signals to
the back two speaker systems [NOTE tn
2-Ct-t DIRECT and PLUS BACK modes the
receiver automnncally doubles output pewer
lor 2-channel stereo reproduction )

OS SYNTHESIZER creates a realistic 4~
channel sound lleld ellect from most convon-
tionat E-channel sources including FM stereo
It is hailed as the onty truly A-channel synthe-
5izer available today

OS is tor decoding and rooroducrng OS-
enmdec 4-channel records. tapes and FM
4 channel broadcasts.

50 allows the proper Phase Matrix decodlng
oi SO encoded 4-channei sources. It does
away with the gain riding logic (and its disad-
vantages] used in many SO decooers. yet
actually decodes SO musrc with comparable
lront-back separation

CD-d/d-CH DIRECT is used tor playing CD-4
land OuadfadlSCJ records in 4-channet Use it
also when listening to any discrete tlcnannel
AUX or TAPE source

Convenient mhannel Controls

There are independent, lrtction-couolec
treble and bass tone controls tor the lront and
back channels These operate trom an exclusive
tC amplitier ol very high-periormance specrti-
cations tor minimum distortion and improved
Signet-to-ncixse ratio.

Then. tor accurate channel-to channel

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oatanclng. there are triction-coupled controls
to adiust relative tell/rig ht balance Oi the lront
and back channels independently Each has
a center click-slop lor easy use

When any at the 4£hannet lunction push-
buttons is engaged. a long-tile LED (Light
Emitting Diode] indicator on the lront panel
glows red to indicate dchannel operation; it
glows green in 2~channet use

Also on the lront panel are controls tor CD 4
separation adiuslment The carrier level adiustor
is located on the rear oanot

Bulitvin CD-4 Demoduletor

To ensure the best possmle high lidetity
reproduction ot records made With the CD41
system. Sal'lSUI engineers have desrgnod a new
CD-a demodulator tor our d-chennet products
Staning lrom scratch. lhoy introduced a
number ol Signiticani improvements lnCiUCJV'
completely "beat lroo" reproduction by the
ot a sharp cut-oft (better than 50dB at l3k. ._,
2stage LC highpass litter in the ditterenoe
Signal channels This makes a great dillerence
in 4vchannel Since clean and transparent sound
is assured Then to av0id cutting oll the high
treouencies 01 records not made wrth CD«4i
the 00-1 demodulator is completely Dynassod
when not in use By the way. a tree (JD-4
:ldtUSlmenl record comes with the receiver

FM/AM TUNER SECTIONS

Mos PET and le tor FM Tuner

The trontend ol the advanced FM section at
the ORX-SOOI has a high ognal to naise ratio
and outstanding sensitivity thanks to the com-
bination of an elaborate 3 gang tuning caprv
itor and a dual gated MOS FET. The FM lF 3
uses two bi~resonator ceramic litters and e
matching 3-stage transistor lC amplifier and
limiter Circuit, making posstble higher selecti-
vity and improved capture ratio Further. a
supervwde range lranstormer. developed by

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