Bedienungsanleitung Marantz Model 2245 (Seite 9 von 28) (Englisch)

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näy

"silver"

while the other

bare copper.)

Coded

wires

help insure identical connections

for each

channel,

For

each channe.

the coded wire can be connecred

between the

"commoi"

termjnal of

your

loudspeaker

and the

GROUND terminal of the

amplifier

channel. The

remaining uncoded wire is

then connected

between the remaininq

Loudspeaker

and

amplifier lerminals.

This insures correct

polarity

phasing

identical

loudspeakers.

l{ there

is any doubt about

phasing

o{ loudspeaker

pairs,

or if they are

not

identical

loudspeakers, a

simple

listeninq

test

can

verify correct

phasing.

With

program

signals fed to both channels, and

with the

MONO

pushswitch

depressed, the sound

should

appear to originale at a

point

midway

between

the loudspeakers,

with

the

balance control

centered.

As the balance contro is turned away

from the center

position,

the sound source

shou d

appear

to move toward one

of the Loudspeakers.

Room

acoustics can somelimes

make this test

ambiquous

or confusing.

lf so, lemporari

rnove

the

loudspeakers as c ose toqether

possible.

Then

set the controls

for

balanced

IMONO operätion and

listen to

program

material with strong

bass

pass

ages. Reverse the

wires to one of the loudspeakers

and listen

to the same

passage

again- lf there is

.ofic"obly

less b"\s w l I'

'Fvp

'ad

orn"cr:on.

change

the connections back to the original ar

ranqement.

lf there is noticeably more bass,

leave

the wires connected in reverse,

These

phasinq procedures

should be used with each

stereo

pair

Loudspeakers, whether IMAIN or

REMOTE.

lf both

pairs

of loudspeakers are used in

the sanre listening

area, ensLrre that the [4AlN

peir

is also

"in phase"

with

the REMOTE

pair.

CAUTION:

NEVER

DIRECTLY CONNECT THE LOUD

SPEAKER

TERIV]INALS OF ONE CHANNEL

PARALLEL WITH THOSE OF ANY

OTHER. ANY RESULTING

DAMAGE IS

NOT COVER ED UNDE R

WARRANTY.

FM ANTENNA

The best

F [/] reception

is obtained with a

Log-Periodic

type

antenna,

moLnted

on a

qood

quality

rolor system. For fringe areäs, I\4arantz

recommends a

Log Periodic

antenna with six or

more elements designed expresslV Jor FM

reception. For minimum local noise

and

multipath

picl<Lrp

by the lead in wires, Lrse a balanced änd

shielded

300ohm cable.

(An

unshielded lead-in

wire can

act as än omnidirectional antenna,

and

can cancel

the directional benefits of

your

ä1'pr1a.) Lolv

los.300.ol_Tl \'

eld"d cdb'p

or\,sls

of two inner conductors

plus

an ouler shield and

insulating

jacket.

This type of shielded cabe

effectively

prevents

the

lead-in from

contributifg

multipath distortion.

For rural

areas, it is recommended that a loca

dealer be

consulted about antenna installation and

lightning

arrestor

protection-

I\,4aster

antenna

system

are not recommefded

{or

use with

your

Model 2245; such systems are

usually

designed

expressly

{or television

reception

and

frectuently

suppress

FM siqnals before distribution. ln

addition,

rnaster antenna systems

often

severely

limit

good

qLrality

FIVI

reception.

Where ouldoor antennas

are

prohibited

inconvenient,

use a simple

form

of 300-ohm, TV

"rabbit

ear"

antenna or the simple

ribbon

type

{olded dipole anterrna supplied

with the lvlodel

2245.

Aarh are

practical

änd will

qive

satisfactory

results in

primarv

siqnal

areas.

Your [,4odel

2245

Receiver

will accept either a 75 ohm or 300 ohm

antenna.

(See

diagram

Figure

3.)

The

300ohm

inrenna cable should be connecled

the two

terminals marked

FIM on the

ANTENNA terminal.

When using

75 ohm coaxial

antenna cable, connect

its sh;eld

to the

"G"

(GROUND)

terminal, and its

inner or center conductor

to either

the

üü

Fiqure

Fl',4/A[4 Antenna Connection

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Marantz Model 2245 Seite 9

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