Fisher X-100 Installation guide

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[tnr rtsnrn X-]00 was designed to provide maximum circuit flexi-
I bitity with operational simplicity at moderate cost, while main-
taining the Laboratory Standards that distinguish all FISHER
components. This has been achieved on a single superbly engineered
chassis combining a stereophonic Preamplifier-Equalizer and Tone
Control circuit, a dual-channel 40-watt Power Amplifier, and a self
contained Power Supply. With the addition o{ two appropriate loud-
speakers, or speaker systems (such as the FISHER XP-l), the X-100
will perform as a stereophonic sound system of the highest quality.
The preamplifier section contains 14 input jacks to which may be
connected eyery type of monophonic or stereophonic cartridge, tape
recorder and tuner on the market, Located on the front panel are 16
controls and switches which permit the selection of any program
source for either monophonic or stereophonic operation, and the
adjustment of volume, balance, and tonal characteristics through every
nuance of the audio spectrum. Advanced electronic circuitry, and the
careful selection o{ parts, reduce hum, noise and distortion below the
threshold o{ audibility. The power amplifier section, equipped with
matched pairs o{ EL84's, has excellent overload characteristics and a
very short recovery time, resulting in performance that is superior to
amplifiers with a higher power rating. A switch-controlled Center
THE FISHER X.IOO
STEREOPHONIC
Mosfer Control Amplifier
Channel output jack is included to which a third amplifier and loud-
speaker may be connected to augment the stereophonic sound pattern.
Once you have operated the X-100, you will realize why FISHER
produets have achieved a world-wide reputation. The guality under-
Iining this reputation will assure you of years of trouble-free operation
and unsurpassed listening pleasure.
A NOTE ON STEREOPHONIC SOUND
[lnn onveropurur of stereophonic sound has brought us close to
I achieving "Concert Hall" realism in the home. This dual"channel
system ofiers a distinct advantage over monophonic (single-channel)
systems by virtue of two important audio characteristics: the dimen-
sions of d.irection and depth. These live sound qualities are for the
most part missing in monophonic systems because recordings are made
and reproduced over a single channel. This is somewhat analogous to
listening to music with one ear. Stereophonic recording techniques,
however, utilize two separate banks of microphones which are posi-
tioned at the le{t and right sections of the orchestra. In this arrange-
ment, the microphones receive the musical sounds in much the same
manner as the two ears of a listener. The sound picked up by each

TABLE OF CONTENTS
INSTATTING THE X.IOO
CONNECTING ASSOCIAIED COMPONENIS
HOW TO USE THE CONTROTS
A SHORT OPERATING GUIDE FOR IHE
.MAN IN A HURRY'
STEP-BY.STEP OPERATING GUIDE
FOR THE X.IOO
CUSTOM INSTATTATION
TECHNICAT SPECIFICATIONS
PAGE
2
4
7
I
l2
l4
l6
bank of microphones is then led to independent channels and recorded
oii'disks or tape, or transmitted over separate channels of a stereo-
phonic broadcast.
That is why two Eeparate sound channels are required to reproduce
a stereophoni; ,eco.ding or broadcast in the home. The stereo sound
output ;f a record player, tape recorder or tuner is Ied to two sepa'
rate amplifier "hannels, which in turn drive two separate speaker sys'
tems, Tirus,. instruments located on the left and right sides oI the
orchestra are heard predominantly in the left and right speakers,
respectively; while instruments located in the center appear to be
heard mid-way between the two speaker systems. The result is a start-
ling sense of presence realized only at a live orchestral performance'
INSTALIING THE X.TOO
TVflnxrxc: The FISHER X-IOO must not be operated before con'
W n""ting loudspeakers, or equivalent load resistors' to the Speaker
Terminals in each channel; otherwise, serious damage to the equip-
ment may result. II you have not yet completed your stereophonic
system, and are temporarily using only one channel of the X-100, use
iharrnel A and be sure to connect an equivalent load resistor to the
Speaker Terminals o{ the unused channel. See "speaker Connectioits'"
This unit may be installed in any convenient location receiving ade'
quate ventilation, This is important since excessive heat will shorten
tie life of any electronic instrument' Do not install the X'100 above
other heat-producing equipment or in a totally enclosed area' II you
install it in a cabinet, leave the back open and at least two inches
away from the wall. If the cabinet is made o{ wood, provide ventila'
tion grilles on top and leave at least 4 inches of space between the top
o{ the tubes and the cabinet, and' ar least 2 inches on each side.
Should you wish to install the X-100 in your own cabinet, directions
and diagrams are provided in the last section of this booklet. (Tw.o
FISHER cabinets are available lrom your FISHER dealer. These are
the Model MC-2, in metal, and the 10-U in rvalnut and mahogany.

Either will convert the X-100 into an attractive part of your room
decor.) Temporarily, place the unit in its approximate location to
permit an estimate of cable lengths to associated components.
Locolion of Loudspeqkers
To obtain optimum stereophonic performance from your FISHER
equipment, use two loudspeakers, or speaker systems, as nearly alike
as possible. Stereophonic sound utilizes the lelt and right speakers to
coincide with the music originating on the left and right sides of an
orchestra, respectively. To recreate the original orchestral placement
in your room, connect the speaker on your left (as viewed from the
listening area) to the Channel A speaker terminals, and the speaker
I on your right to the Channel B speaker terminals. Certain preeautions
should be observed in the final location o{ these speakers.
Where possible, speakers should be placed against a flat wall and
separated by a minirnum oI five feet. As a rule of thumb, the best
listening area will be at a distance about l1/z times as great as the
separation between the speakers. For example: if the speakers are six
feet apart, listening will be best in an area about nine feet from, and
opposite the two systems. Because of varying acoustical conditions,
however, the speakers may have to.be repositibned to achieve the best
stereophonic results.
FIGURE l. Reor ponel of X-IOO
If you place wall"type speaker systems in the room corners, undesir'
able efiects may be introduced. Try placing them, instead, on the same
wall, a short distance from the corners.
If you own two corner-type speaker systems, experiment by leaving
one in a corner and placing the other against a flat wall. Then com'
pare this arrangement with the original one.
In a long.narrow room, placing the speakers on the long wall may
bring better results than placing them on the short one.
Speoker Connections
Speaker terminal strips are provided for each channel to accommo-
date speakers, or speaker systems, having an approximate'impedance
of 4, 8, or 16 ohms. The connecting cable may be up to 100 Ieet in
length, and ordinary lamp cord can be used. Connect one lead of the
cable from the speaker on the left (as viewed from the listening
area) to terminal 4,8, or 16 of the Channel A terminal strip (depend-
ing on the impedance of the speaker ) and the other lead to the GND
terminal. Connect the speaker on your right to Channl B in the same
manner.
IMPORTANT: II you are temporarily using only one channel, make
connections to Channel A, and connect an B-to lO.ohm, I0-watt load
resistor to the speaker terminals Ior Channel B.

Connecting q Cenler Chqnnel
In large tooms, where it may be necessary to space loudspeakers
farther apart to cover a wider area, a'ohole" may develop in the center'
This apparent lack of sound in the center will become more noticeable
as the distance between the two speakers is increased. It is possible to
fill in this gap with the addition o{ a center channel amplifier and
loudspeaker.
Th; X-100 is equipped with a Center Channel output jack which is
connected to a divider network across the output stages of Channel A
and B. Equal portions of the audio output signal from each channel
are thus combined to form a center "phantom" channel' By connecting
an additional amplifier and loudspeaker to this output jack, and posi
tioning the speaker between the left and right speakers, the stereo"
phonic pattern o{ sound will be augmented.
The third amplifier need not be equipped with tone controls' since
these are provided hy the X'100, A volume control, or input level con-
trol, will be helpful, however, in order that the volume of the center
speaker may be adjusted to the necessary level. Connect a short length
oI shielded cable, of the low-capacitance type, {rom the CENTER
CHANNEL output jack on the rear panel o{ the X'100 to an input
o{ the center channel amplifier. The length of cable from the amplifier
to the center speaker can be considerably longer (up to 100 feet, or
more) depending on the type of amplifier used.
The center speaker can also be used in an adjoining room or some
other remote location. Although the output from this extension speaker
will be monophonic, it will contain the composite stereo signal.
CONNECTING ASSOCIATED COMPONENTS
la\x rnu REAR PANELS of the X-100 are 14 input jacks and 3 output
Llju"k. to which can be connected tuners, tape recorders, tape
decks,'and record players with ceramic and magnetic cartridges. (See
Rear Panel, Figure 1.) The Channel A jacks are located directly on
(T'
the rear panel, while the Channel B jacks are located on top of the
chassis just alove the rear panel. (See tube layout Ior the X-100
Figure 2.) Information {or connecting the various-types of components
urJ "ontuin"d in this section. At the conclusion of this section' a table
is provided, Iisting all inputs, their impedances,-and the components
that may be connected to them, in addition to those outlined here'
Auxiliory AC RecePtocles
The two auxiliary receptacles on the rear panel may be used as
power outlets for your associated components' The combined power
Lorr.ornption of these components may not exceed 350 watts' Power
to the receptacles is supplied only when the power to the X'100 is
turned on.
ci
4theAandBoutput
I A and B, MAG 2 input
MAGNETIC MONOPHONIC CARTR.IDGE: Connect fhe output cable
from the record player to the Channel A or B, MAG 2 i.nnut jack:
(or to MAG I i{ these jacks are occupied.)
MAGNETIC HIGH TEVEL CARTRIDGE: Make connections to the
Channel A and B, CER PHONO input jacks for the stereophonic
type. Use Channel A or B for the monophonic type.
IMPORTANT: Because the impedance of these cartridges may varv
with difierent manufacturets, a resistor may have to be strapped across
the output terminals to insure the correct impedance match. Tables I
and 2 will serve as a guide lor using magnetic low level and magnetic
high Ievel cartridges, respectively. Remember to strap a resistot across
each output oI a stereophonic cartridge'
CERAMIC STEREO CARTRIDGE: Connect the A and B output cables
from the record player to the Channel A and B, CER PHONO

Cortridqe Loodinq
,._-._-:- _-__, -:, l00K 82K 68K 56K 47K 39K 33K 27K 22K
rmpedonce requtted
Vqlue of resistor none
to be odded required 680K 220K l20K l00K 6gK 47K39K 27C
TABTE 2, Mclching high level mognetic cortridges to MAG I qnd
€ER PHONO inputs.
Tope Decks
A tape deck is the tape transport mechanism minus the preampli
fier and audio controls. To provide playback {or recorded tapes, it
input jacks. If these are occupied, you can use either AUX I or AUX
2 input jacks, but you will lose some bass response. (Thi5 loss can
be compensated somewhat with the Bass controls.)
CERAMIC MONOPHONIC CARTRIDGE: Connect the output cable
from the record player to the Channel A or B, CER PHONO input
jack. If these are occupied, use either AUX 1 or AUX 2 input jacks.
IfuIPORTANT.'Do not connect components to both the MAG 2 and
CER PHONO input jacks at the same time These jacks are electri-
cally parallelled and the input circuit will be overloaded.
Cortridqe loodinq
impedonie ,equirei 42K 39K 33K 27K 22K
Volue of resislor none
to be odded required 470K I50K 82K 47K
TABTE l. Motching low level mognetic cortridges to MAG 2 inputs.
must be connected to a control amplifier. These facilites are provided
by the X-100.
STEREOPHONIC TAPE DECK: Connect the A arrd B (le{t and right)
output cables from the tape deck to the Channel A and B, MAG 1
input jacks on the X-100.
MONOPHONIC TAPE DECK: Connect the output cable from the tape
deck to the Channel A or B, MAG I input jack.
Tope Recorders
A standard stereophonic or monophonic tape recorder (equipped
with its own preamplifier) may be used with the X.LN) in two ways.
First, it can be used to record the output of any component being
played through the X-100. Secondly, it can play through the X-100
previously recorded program material. Permanent connections between
the recorder and the X.100 can be made to carry out these functions.
RECORDING CONNECTIONS:
STEREOPHONIC RECORDER: Connect cables from the Channel A
and B, REC output jacks on the X-100 to the A and B (left and
right) recording input jacks on the recorder.
MONOPHONIC RECORDER: Connect a cable {rom the Channel A
or B, REC output jack on the X-100 to the recording input jack on
the recorder.
NOTE: Any program source connected to the Channel A or B input
jacks of the X-100 can be fed to either or both REC output jacks,
depending on the position of the Mode Selector switch.
PI.AYBACK CONNECTIONS:
STEREOPHONIC RECORDER: Connect cables from the Channel A
and B (left and right) output jacks on the recorder to the Channel
A and B, AUX 1 or AUX 2 input jacks on the X-100,
MONOPHONIC RECORDER: Connect a cable from the output jack
on the recorder to the Channel A or B, AUX I or AUX 2 input jack
on the X-100.

MONITORING CONNECTIONS:
NTTE:Theseconnectionsapplyonlytotaperecordersequipped
with separate recording and playback heads'
STEREOPHONIC RECORDER: Connect cables from the Channel A
""a S tl"ft and right) output jacks on the recorder to the Channel A
and B MON inPut jacks on tbe X-100'
MONOPHONIC RECORDER: Connect a cable from the output jack
oo-th"r".ord"rtotheChannelAorBMONinputjackontheX-100'
Spccexpcnder
There are two possible methods o{ connecting the FISHER- Dy-
no*" Spa""*panilir,.Model K'10. If your high fidelity svstem includcs
ui"p".""*a"t whicil is connected tothe tape monitor {acilities of the
*-lin \"". preceding section)' you should use the special jacks-on
ifr" *p'"f tie X-jffi'chassis for the connection ol the Spacexpander.
In this case, you will be able to add reverberation directly to your tape
recordings,.but yoo will not be able to add additional reverberation
a".i"g pi"vf*k.. I{ you wish to add reverberation during playbag!,
"orrn.""t'th" output c;bles from your tape recorder to a pair of AUX
itp"r. "" the X'tm. On the othlr hand, the Spacexpaniler should be
".irrn""t"d to the tape monitor lacilities if they are not being used ,ruitft " op" recorder since this will permit you to use the Tape Moni-
tor switch as a reverberation on-ofi switch'
CONNECTIONS WHEN USING A THREE-HEAD TAPE RECORDER:
l-Locate the special Spacexpaniler jacks on the top of the X-lO0r
"tr"..i., remove the shorting Lars and store them in a safe place for
possible future use.
2-Make the {ollowing connections:
a) CHANNEL A OUT jack on X-100 to CHANNEL A OUTPUT
jack on SPacexPander'
b) CHANNEL A IN jack on X-100 to CHANNEL A INPUT jack
on SpacexPaniler.
c) CHANNEL B OUT jack on X-100 to CHANNEL B OUTPUT
jack on SPacexPaniler'
d) CHANNEL B IN jack on x-100 to GHANNEL B INPUT jack
on SpacexPaniler,
CAIITION: The shorting bars must be inserted as shown in Figure
+-*fl"" *" Spacexpand,ir is not connected to the X'100' Otherwise'
the X-100 will be completely inoperative'
CONNECTIONS WHEN NOI USING A THREE-HEAD TAPE
RECORDER:
I-Channel A REC output jack on X'100 to CHANNEL A INPUT
jack on SPacexPaniler.
2-Channel A MON input jack on X-IN) to CHANNEL A OUTFUT
jack on SpacexPaniler.
3--Channel B REC output jack on X-I^O to CHA"I\NEL B INPUT
jack on SpacexPaniler.
4-Channel B MON input jack on X'lN to CHANNEL 3 OUTPUT
jack on S'pacexPaniler.
Tuners
The X-IN is equipped to accommodate various combinations oI
Tuner outputs. Th"s"- include monophonic FM, monophonic AM'
-"""pft""i'" FM'AM stereophonic FM'AM, and stereophonic FM'
Multiplex.
MONOPHONIC FM AND/OR AM: Connect an output cable Irom
the FM tuner to Channel A TUNER input jack, and a cable from the
AM Tuner to Channel B TUNER input jack'
STEREOPHONIC FM'AM: Connect a cable {rom the FM section oI
the Tuner to Channel A TUNER input jack, and a cable {rom the
AM section to the Channel B TUNER input jack'
NOT.E: The FM portion oI an FM-AM stereophonic broadcast-is
hea.d on Channel i (t"tt speaker), while the AM portion of the

v
broadcast is heard on Channel B (right speaker.) If you are using a
monophonic FM-AM Tuner, you must connect an additional AM or
FM Tuner to the X.100 to listen to FM-AM stereo broadcasts.
STEREOPHONIC FM-MUITIPIEX: To receive the FM-multiplex sig-
nal, your tuner must either be equipped with an adaptor, or must
already be an FM-multiplex receiver. Connect the adaptor and Tuner,
or the Tuner to the X-I0O as described in the operating instructions
for these units.
Ofher Progrcm Sources
If you wish to connect a short-wave tuner or the audio output from
your TV set to the X-100, we Channel A or B, AUX I or AUX 2
input jacks: WARNING: Consult with your serviceman before you
make connections from your TV set.
HOW TO UsE THE CONTROLS
I rren you HAvE nn.lnn all necessary connections, plug the power
-fLcable extending from the rear into a wall outlet supplying 105 to
120 volts AC only, at 50 to 60 cycles. (Where line voltage is lower or
highero a step-up or step-down transformer will be necessary,) Total
power consumption for this unit, not incluiling associateil conxponents,
is 160 watts. All operating controls are on the front.panel as illus-
tratet ol page B. An explanation of the function of each control is
provided in the following section. A simplified Step-By.Step Operating
Guide is furnished at the conclusion of this section. This Guide will
enable you to select any program source you wish to hear and to set
all necessary controls in a matter of seconds.
AC Ofi and ,Vldster Volume
The AC ofi switch supplies power to the X-100 and is combined
INPUT JACK IMPEDANCE TEVEL COMPONENTS TO CONNECT
MAG It
MAG 2*f
CER PHONO-t
AUX I
AUX 2
TUNER
MON
r 00K
42K
I OoK
560K
560K
560K
260K
H igh
High
H igh
low Tope Deck ((or low level
netic Corlridge, if MAG 2
cupied.)
low Mognetic Cortridge (low level.)
/v{edium Mognetic Corlridge (high level.)
Ceromic Cortridge,
High Tope Recorder (with common
ploybock ond recording heod.)
FM, AM, ond FM-AM Tuner.
Shorl-Wove Tuner,
TV sound oulpul.
Some os obove,
FM, AM ond FM-AM Tuner,
Tope Recorder (with seporote
ploybock ond recording heods.|
Other high level signol sources
(os in the AUX inpuls.l
Mog-
is oc-
*Do nol connect componenls lo lhe MAG 2 ond CER PHONO input
iocks ot lhe some time. These iocks ore eleclricolly porollelled ond
input circuil will be overlooded,
fThe impedonce of lhese iocks (MAG I ond MAG 2) con be chonged,
lo occommodole cortridges of difterent impedonces, by stropping o
resislor ocross the corlridge or the input iock. See Tobles 1 ond 2.
TABTE 3. Componenl Conneclions to lnput Jocks

f{*
A SHORT OPERATING GUIDE FOR ,THE MAN IN A HUR'RY,
MODET X-IOO
THE
,o.,
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FISHER r'o
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POWER
TOW LEV€L
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rouDNtSS
CONTOUR
n:r:'O"
STEP I
Sei oll swikhes ond con-
lrols os shown. Turn on
power by lurning /IIASTER
VOLU ME conlrol slightly
clockwise unlil it clicks.
Adiust lqier for volume.
STEP 3
Set i,lODE SE|,ECIOR to type of opero-
tion desired.
MONO PHONO to PloY monoPhonic rec-
ords wilh q slereo cortridge.
STEREO to listen to oll siereo Progrom
moteriol.
A for ony monophonic Progrom source
connecied to Chonnel A.
B for ony monophonic progrom source
connecled to Chqnnel B.
STEP 2
Sel INPUI SEIECTOR to progrom source
you wish to heor.
hnlO-t or MAG-2 to ploy records on
o ployer connecled to lhe MAG-I or
lv{AG-2 iocks.
TUNER to lislen to q rqdio broodcqsl.
AUX-| or AUX-2 to listen to ony olher
progrom source connected io rhe AUX
inputs.