Bedienungsanleitung JBL mr 28 (Seite 5 von 8) (Englisch)

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If only an 8-ohm rating is given, the

amp/receiver may or may not be

designed to handle 4-ohm combined

ratings. Consult the owner’s manual

of the amp/receiver for clarification.

POWER HANDLING

Thanks to their high efficiency, the

JBL MR Series Loudspeakers will

produce reasonable volume levels in

a room of moderate size with very lit-

tle amplifier power. However, using a

small amplifier to obtain the desired

volume listening levels may lead to

overdriving the amplifier. This will

generate high distortion levels and

may cause damage to your loud-

speaker. For the best performance,

an amplifier should be selected with

an output rating that is greater than

the maximum power that will be

used. This margin of reserve power

will ensure that the amplifier will not

attempt to deliver more power than

its design allows. However, the

amplifier’s power rating per channel

must not exceed the maximum rec-

ommended amplifier power for that

specific loudspeaker model. Please

see the specification section for

details. Following these guidelines

will provide virtually distortion-free

sound reproduction and long loud-

speaker life.

TROUBLESHOOTING

The vast majority of new speaker

“malfunctions” end up being traced to

connections or switch settings. To

avoid packing up correctly functioning

speakers and sending them off, only

to find that they’re not really at fault,

check the following tips first, before

requesting service.

No sound at all or very faint sound

from both speakers

1. Amp/receiver tape monitor button

pushed in while using CD, FM or

phono inputs.

2. Wrong speaker switch, “A” or “B”

speaker output.

3. Sound source (CD,cassette deck,

turntable) not turned on, not activat-

ed, not hooked up or not selected on

amp/receiver front panel.

No sound from one speaker

1. Balance control turned all the way

left or right.

2. Speaker wire has become discon-

nected.

3. One of the connections between

sound source and amp/receiver is

faulty or has become disconnected.

Both speakers play at low volumes

but shut off as volume is in-

creased OR sound turns on and

off intermittently

A few strands of speaker wire may

be shorting out. Recheck the con-

nections. Recheck the impedance of

the amp.

Bass is very weak AND/OR sound

seems to come from each speaker

separately, without creating a

stable stereo image between the

speakers.

1. The polarity (+ & –) of one speaker

has been reversed relative to the

other. Double check connections.

2. Speakers are too far away from

back and side walls or too far apart.

Experiment again with the speaker

placement. If you are still encounter-

ing problems, consult your JBL

dealer.

Additional Areas to Check When

Using an AV Receiver:

No sound at all or very faint sound

from the center channel or other

speakers

1. Speaker wire has become discon-

nected.

MR SERIES LOUDSPEAKERS

MR Series OM 7/28/98 10:32 AM Page 5

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