Fisher 400 CX Owners Manual

Page 1

OPERATING INSTRUCTIONS AND WARRANTY

THE FISHER

400-CX

STEREOPHONIC MASTER AUDIO CONTROL

WORLD LEADER IN HIGH FIDELITY

PRICE SLOO

Page 2

Congratulations!

WITH your purchase of a FISHER instrument you have completed a chain of events that
began many months ago. in our research laboratories. For it is there that the basic con-
cept of the equipment you have acquired came into being -- its appearance, its functions, its
quality of performance.

But the end step -- your purchase - is merely a beginning. For you and your family, it will
provide years of musical pleasure. The FISHER is from its inception designed to give long and
trouble-free service. Some of the instruments we made twenty-three years ago are still in use
today!

It is our continuing desire that your FISHER give you always the best performance of which
it is capable. if you need our assistance at any time toward that objective, please keep in mind
that we are always at your service.

IN CLOSING -

Many hours have been spent by our engineers and technical writers to create this instruction
book for your guidance and enjoyment. if you want the most out of your FISHER. there is
only one way to obtain it. With the equipment before you, please read this booklet carefully.

it will be time well-spent. a F

Fisher Firsts-Milestones In Audio History

1337 First high-tidelity sound systems lcaturlng a beam- was First complete Stereonhonic FMAM Receiver (FM
power ampliiier, inverse toedback acoustic speaker AM tuner. audio control, Amwatt amplitier).
compartments (lriiinite halite and bass rctlex) and 195! First high-compliance plushlgh»eiiiclcncy tree-piston
magnetic cartridges. speaker system.

"11 First exclusive high iideiity TitF tuner, leaturing "on first to use Microkay for FM tuning and as a
broad-tuning 20.000 cycle tidelity. Recording Audio Level Indicator.

I931 First twotunlt high ildeliiy System with separate isso First complete stereo FM-AM receiver with so-watt
speaker enclosure. power amoliller and new 7591 output tubes.

In! First coaxial speaker system. Isoo Smithsonian institution, Washington, o.c_, accepts

I93! First hlgh tldclity tuner with amplitied AVC. tor its collection America's first commercially man-

uiactured high iidelity radio-phonograph, made by
Avery Fisher in 1937.
taco First reverberation device, tor use in high fidelity

I!!! First 3-Way Speaker in a high fidelity system.
me First Conter- iChanncI iuning indicator.

45 First" Proanlt Iit r~EouaIlzer with selective phono- equipment-The fish" Dynamic Spacerpander.
grap eoua 1a ion. . , .
1m First Dynamic Range Expander with teedback. 3:: 2g: ivral°n3wkrg= n":$"°';"
9 '9' "MM m" Ym "mp" c' mo First m tuner with live limiters-
952 Fim so-Watt, Hm Mme" to First two! ancl antenna selector switch. 72-300
as: First sell-powered Master Audio Control. ohm, Local- istant positions.
"53 '5 MW?! "°"'°"° ""9°°" ""°' issi First Multiplex units with static smart and auto
9'5 for "I ll eiity "5" matic switching. mono to stereo.
"5: First Universal Horn-Type spkeaim Enclosure For any a First complete receivers with Multiplex.
".°" '°"° a. a 5?" '" mi First FM-Stereo-Multiplex tirriors with steam BEAM.
195: First FM-AM Receiver with a cascode Front End. . .
- I! First loudspeaker s stem with tramelcss wooicr
"5 First tow-cost 9"°!'°"'° "Inna" . cone. eliminating at parasitic resonance.
I! First modaratoiypriced. proicssional FM tuner with 9 First internal switching s stem to permit immediate
7! meters. . , . . tape playback with use 0 all controls and switches.
"55 5' P"" P°w".'"d'°"°' " '3 IIGBIIU. . » I962 First simplliledvoperatlon Control-Amplifier, with in-
Ill! First Master Audio Control Chassis with iive~posi» frequently used controls behind "om_p.n¢| cover.
tron mixinl iacllltles. yet immediately accessible.
I155 First correctly couallrod, direct tape-head master ".1 First loudspeaker with eddy-currentAdampcd voice
audio controls and sell-powered preamplifier. coll.
53 FF '0 "9 HEW" WWW {Mm 3mi?""°'- mz First bass speaker with combined serrated-aluminum
I!!! First All-Transistorlzed Preamplifier-Equalizer. and litter cone.
I! First dual dynamic limiters in an FM tuner tor home 1381 First FM tuner Kit with separate d'Arsonval meter
use. tor tuning and separate cathode ray stereo broad
1956 First Pcriormanca Monitor in a high quality ampli» ' cast indicator (STEREO BEAM).
iier For home use. tau First Starcophomc FM Tuner with iUNE-O-MA'tIC
use First FM-AM mm with Two meters. Mott" Tum"!-

qu First supersonic Wireless Remote Control in a high
tldclity component.
ins: First to use 8417 tubes with union: cavity-anode

I. First complete graphic response curiia indicator for
bass and treble.

"51 First Goldln Cascode FM tuner. SI".
"57 "'5' "7th MI"! "53" toe: First power amplilier to use oscilloscopetype, tre-
issa First Storeophonic RadioPhonograph with Magnetic ouency compensated input circuit.

597 cartr It "63 First ampliiicr kit with STRAYABALANCE. visual dY

in First high-quality stereo Remote Control System. namic balancing system.

Page 13

ADJUSTMENT OF LEVEL CONTROLS

Three pairs of concentric Level controls, located on top of the chassis at the rear,
establish the amount of signal fed to the 400-CX from the associated components
connected to the input jacks. These controls have been set at the factory for full
signal strength (fully clockwise). They may require resetting when the 400-CX

is first installed, but are not normally used in subsequent operation.

Because of difierent levels of signal strength
from the associated components, some pro-
gram material may appear louder than others
at the speaker systems when you change the
Pushbutton settings. This undesirable condi~
tion can be eliminated by equalizing the sig~
nal levels at the input jacks using the Level
controls.

Signal strength from a component can be
adjusted by ear by turning the appropriate
Level control fully counterclockwise, and tum-
ing the Volume control on the 400-CX to full
maximum. Then turn the Level control clock-
wise until the volume level reaches a point
that is as loud as you will ever wish to hear

it. Do this for each component. depressing
Pushbuttons alternately and listening to the
comparative levels. Readjust the Level con-
trols where necessary.

MAG I, MIC: These controls vary signals from
components connected to the MIC, TAPE
HEAD and MAC 1 input jacks.

MAG 2, CERAMIC TAPE: Use these controls to
adjust signals from components connected to
the MAC 2 TAPE HEAD and CERAMIC in-
put jacks.

AUX 2: These controls are used to adjust the

signal from s component connected to the
AUX 2 input jacks.

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SONIC NULL BALANCING

Although it is possible to balance the stereophonic output of the 400-CX by
car alone, the results may only be approximate. Consequently, an aural and elec-
tronic method has been devised to insure precise dual-channel balance. This
method, known as Sonic Null Balancing, provides a simple means of adjusting
the preamplifier and power amplifier sections, in conjunction with the from panel
controls and level controls. Each set of level controls is adjusted separately for

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