Harman Kardon CITATION I Owners Manual - Page 10

Low

Cut

Control:

The

LOW-CUT

control

has

three

positions.

In

the

SUBSONIC

position

a

fi

lter

is

inserted

into

the

circuit

to

remove

all

response

below

the

audible

range.

This

eliminates

the

possibility

of

speaker

"breathing",

a

relatively

slow

movement

of

the

speaker

cone

at

great

amplitude.

Breathing

is

caused

by

such

unmusical

aberrations

as

ec-

centric

records,

passing

trucks,

etc.

and

results

in

intermodulation

distortion

and

speaker

damage.

The

RUMBLE

position

fi

lters

out

the

very

low

bass

frequencies,

to

eliminate

unwanted

elements

such

as

turntable

rumble

and

low

frequency

acoustic

feedback.

The

FLAT

position

is

for

the

purist,

with

the

fi

nest

of

accessory

equipment.

All

fi

lters

are

removed,

and

the

low

frequency

re

sponse

is

limited

only

by

the

power

amplifier.

(The

Citation

II

basic

amplifier

has

a

low

fre-

quency

cut

off

of

2

cycles.)

Blend

Control:

In

a

two

-channel

stereo

system,

where

the

room

acoustics

or

too

-wide

spacing

of

the

speakers

cause

the

sound

to

come

from

two

sources

rather

than

from

one

very

broad

source,

a

"hole

in

the

middle"

effect

exists,

By

setting

the

MODE

switch

to

the

BLEND

position,

and

then

rotating

the

BLEND

control,

the

two

apparent

sound

sources

will

be

electrically

"moved

together",

eliminating

the

hole

in

the

middle.

The

BLEND

control

should

be

turned

up

just

enough

to

satisfy

the

listener

—further

increase

will

degrade

the

stereo

effect

by

eliminating

all

separation.

Alternately,

and

as

a

more

professional

approach,

a

third

-channel

monophonic

amplifier

and

speaker

may

be

in-

stalled,

the

third

speaker

to

be

located

midway

between

the

fi

rst

two.

(See

installation

section.)

The

BLEND

con-

trol

then

controls

the

volume

of

the

third

speaker

without

affecting

the

other

two,

and

may

be

adjusted

to

create

the

illusion

of

a

wall

of

music.

For

this

method,

the

MODE

switch

is

set

to

the

STEREO

position.

Phasing

and

Stereo

Reverse

Switches:

These

two

switches

have

completely

separate

functions,

but

are

very

similarly

applied.

The

PHASING

switch

reverses

the

phase

or

polarity

of

one

channel.

In

connecting

the

speakers

to

the

power

amplifier,

since

an

indi-

vidual

speaker

has

no

polarity,

it

is

possible

to

connect

them

so

that

on

identical

program

material

one

will

be

push-

ing

air

when

the

other

is

pulling.

This,

of

course,

is

improper,

and

will

cause

a

"hole

in

the

middle"

effect

on

both

monophonic

and

stereo

program

material.

It

is

easy

to

determine

whether

the

speakers

have

been

connected

properly

by

listening

to

mon-

phonic

program

material

with

the

MODE

switch

set

to

A

&

B.

Slide

the

PHASE

switch

back

and

forth.

If

the

music

sounds

best

and

most

evenly

distributed

with

the

PHASE

switch

in

the

REVerse

position,

the

speakers

are

improperly

connected.

Reverse

the

two

wires

of

ONE

speaker

to

correct

the

condition.

The

system

will

then

sound

best

with

the

switch

in

the

NORmal

position.

However,

some

stereo

recordings

or

tapes

are

made

with

one

channel

reversed

in

phase.

To

correct this,

slide

the

PHASE

switch

to

the

REVerse

position.

Similarly,

some

stereo

recordings

are

made

with

the

channels

interchanged,

so

that

the

percussion

section

of

a

symphony

orchestra

will

appear

to

be

at

the

left

instead

of

the

more

usual

right

side.

This

condition

is

corrected

by

sliding

the

STEREO

REVerse

switch

to

the

REVerse

position.

Tape

Monitor

Switch:

Two

TAPE

OUTput

receptacles

are

provided

on

the

Citation

I,

to

permit

making

tape

recordings

of

any

pro-

gram

being

carried

by

the

system.

The

signals

appearing

at

these

receptacles

are

unmodified

by

any

of

the

con-

trols,

except

for

the

TURNOVER

and

ROLLOFF

switches,

so

that

the

tape

recorder

can

provide

its

own

proper

equalization,

while

the

main

system

is

adjusted

to

the

listener's

taste_

However,

if

the

tape

recorder

is

the

profes-

sional

type,

with

a

third

head

for

monitoring,

it

is

possible

to

compare

the

recording

with

the

original

while

it

is

being

made.

Simply

slide

the

TAPE

MONitor

switch

to

the

IN

position

to

listen

to

the

recording

and

back

to

the

OUT

position

to

listen

to

the

original.

S

Harman Kardon CITATION I Owners Manual - Page 10

Control, Blend, Phasing, Stereo, Reverse, Switches, Monitor, Switch

Page 10 highlights