Optimus AMX-25 Manual de usuario

Cat. No. 40-1372

OWNER’S MANUAL

Please read before using this equipment.

AMX-25

900 MHz Wireless Amplified Speakers

40-1372.fm Page 1 Tuesday, August 10, 1999 3:25 PM

Optimus is a registered trademark used by Tandy Corporation.

RadioShack is a trademark used by Tandy Corporation.

FEATURES

Your Optimus 900 MHz Wireless Am-

plified Speakers bring you the latest

in wireless speaker technology. Oper-

ating in the 900 MHz band, this

speaker system’s signals easily travel

through walls and floors, delivering

high-quality stereo sound to almost

anywhere in or around your home.

Now you do not need to place the

speakers in the same room as your

stereo system to hear your favorite

programs.

The system includes a transmitter

that connects to your audio source,

and two speakers that receive signals

from the transmitter.

The speaker system’s features in-

clude:

Two-Wa

, Bass Reflex Speaker De-

n— provides excellent sound re-

production from even the most

demanding audio sources.

Bass Boost — adds a deeper, richer

bass sound.

10-Watt Amplifier — produces clear

sound throughout the high and low

frequency ranges.

Optional Speaker Bracket — (avail-

able through RadioShack Unlimited)

lets you easily mount your speakers

on the wall.

Char

er Jack — lets you charge the

PRO-100 Wireless Headphones.

THE FCC WANTS YOU

TO KNOW

Your speaker system might cause TV

or radio interference even when it is

operating properly. To determine

whether your speaker system is caus-

ing the interference, unplug your

speaker system’s transmitter. If the

interference goes away, your speaker

system is causing it.

Try to eliminate the interference by:

• Moving your speakers away from

the receiver

• Connecting your speakers to out-

lets that are on a different electri-

cal circuit from the receiver

• Contacting your local Ra-

dioShack store for help

Note: Your speakers are subject to

interference from other 900 MHz de-

vices such as wireless headphones,

cordless phones, or other wireless

speakers that operate on the same

frequencies. If you experience inter-

ference, try moving the speakers

away from the other devices.

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PREPARATION

INSTALLING THE

TRANSMITTER

Connecting to Your Audio

Source

You can connect the transmitter to

your audio source’s left and right au-

dio output jacks or its headphones

jack.

Caution: Do not connect the trans-

mitter to the audio source’s speaker

output. Doing so could damage the

transmitter and audio source.

1. Connect one end of the supplied

audio patch cord to the transmit-

ter’s AUDIO IN jacks (white plug to

Land red plug to R).

2. If you are using your audio

source’s audio output jacks, con-

nect the white and red plugs at

the other end of the patch cord

directly to the audio source’s cor-

responding left and right audio

jacks (white plug to left and red

plug to right).

If you are using your audio

source’s stereo headphones jack,

connect the white and red plugs

at the other end of the patch cord

to the white and red phono jacks

on the supplied Y-cable.

If your audio source has a 1/8-inch

headphones jack, connect the 1/8-

inch stereo plug on the other end

of the Y-cable directly to the

audio source’s 1/8-inch head-

phones jack.

Note: If your audio source has a

1/4-inch headphones jack, use the

supplied 1/8-to-1/4-inch stereo

adapter.

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Connecting to Power

Plug the supplied AC adapter’s small

straight barrel plug into the transmit-

ter’s DC 18V jack. Then plug the

adapter into a standard AC outlet.

Cautions:

• The transmitter’s supplied AC

adapter (in a box marked FOR

TRANSMITTER) provides 18 volts

and at least 150 milliamps, and

its plug’s center tip is positive.

Using an adapter that does not

meet these specifications could

damage the adapter or the trans-

mitter.

•The

CHARGER jack on the trans-

mitter is for charging the

RadioShack PRO-100 Wireless

Headphones (Cat. No. 33-1145).

Do not plug any other device into

this jack.

INSTALLING THE

SPEAKERS

Select a location for each speaker

that is near an AC outlet.

Caution: Each speaker’s supplied

AC adapter (in a box marked FOR

SPEAKER) provides 15 volts and at

least 800 milliamps, and its plug’s

center tip is positive. Using an adapt-

er that does not meet these specifica-

tions could damage the adapter or

the speaker.

Follow these steps to install the

speakers.

1. Turn off both speakers by rotating

their POWER/VOL knobs fully

counterclockwise until they click.

2. Set each speaker’s mode switch

as follows:

L— For the left stereo speaker

R— For the right stereo speaker

MONO — If your source is mono

3. Plug the AC adapter’s large right-

angle barrel plug into the

speaker’s

DC 15V 800mA jack.

4. Plug the AC adapter into a stan-

dard AC outlet.

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OPERATION

Follow these steps to use your speak-

ers.

1. Turn on your audio source.

2. Rotate the transmitter’s LEVEL all

the way to the right (minimum

setting).

3. If you connected the transmitter

to an audio source’s LINE OUT-

PUT jack (or a jack that is not

controlled by the audio source’s

volume control), slowly rotate

LEVEL to the left until the indica-

tor at the front of the transmitter

just starts to flicker.

If you connected the transmitter

to an audio source’s headphones

jack (or jack that is controlled by

the audio source’s volume con-

trol), set the audio source’s vol-

ume to the desired level first

(about midway), then slowly

rotate

LEVEL to the left until the

indicator at the front of the trans-

mitter just starts to flicker.

Note: Some audio sources might

not make the indicator flicker. For

these sources, simply rotate

LEVEL all the way to the left.

4. Rotate each speaker’s POWER/

VOL knob clockwise until it clicks

and you hear the program source

or hissing.

5. Slowly rotate TUNING on each

speaker until the indicator on the

front of each speaker lights

steadily.

Notes:

• When the indicator lights

steadily, the speaker is tuned

to the same frequency being

transmitted by the transmitter.

• If reception is poor, even when

the speakers are near the

transmitter, try either raising

the transmitter to a position

higher than the speakers or

moving it away from the audio

source.

• When transmitting over long

distances, the signal might get

weaker and the indicator might

dim. When this happens, your

speakers continue to operate

but receive the signals in mon-

aural instead of stereo.

6. Rotate each speaker’s POWER/

VOL knob to a comfortable listen-

ing level.

Note: Make sure you set both

speakers’ POWER/VOL knobs to

the same level so the stereo

sounds are properly balanced

between the two speakers.

40-1372.fm Page 5 Tuesday, August 10, 1999 3:25 PM

7. Set BASS on the back of each

speaker to ON for a deeper, richer

bass sound.

Be sure to turn off the speakers when

you are not using them.

If you hear distorted sound, check

these things:

• Adjust TUNING on the speakers

• Change the position of the trans-

mitter

• Rotate FREQ. ADJUST on the

transmitter and then adjust TUN-

ING until the interference goes

away

• Adjust LEVEL on the transmitter

so the indicator at the front of the

transmitter occasionally flickers

ADJUSTING THE

FREQUENCY

If you receive interference from other

devices, you might be able to reduce

it by adjusting the speaker’s operating

frequency. Simply rotate FREQ. AD-

JUST on the transmitter, then rotate

TUNING on each speaker until the au-

dio is free from interference.

IF YOU HAVE

A PROBLEM

If you cannot get sound once you

have connected the system, check

these things:

• Make sure you rotate each

speaker’s POWER/VOL knob

clockwise until it clicks so the

speakers are turned on

• Be sure the AC adapters are

plugged in and have power

• Be sure the audio source is

turned on and tuned to an active

frequency

• If you have connected to jacks

that are controlled by the audio

source’s volume control, be sure

the source’s volume control is

turned up

• Adjust the speaker’s volume con-

trol

• Adjust TUNING on the speakers

• Change the position of the trans-

mitter

If you still have a problem with the

speaker system, see your local Ra-

dioShack store for assistance.

40-1372.fm Page 6 Tuesday, August 10, 1999 3:25 PM

CARE AND MAINTENANCE

Your Optimus 900 MHz Wireless Amplified Speakers are an example of superi-

or design and craftsmanship. The following suggestions will help you care for

your speakers so you can enjoy them for years.

Keep the speakers dry. If they get wet, wipe them dry immediately.

Liquids might contain minerals that can corrode the electronic cir-

cuits.

Use and store the speakers only in normal temperature environ-

ments. Temperature extremes can shorten the life of electronic de-

vices and distort or melt plastic parts.

Handle the speakers gently and carefully. Dropping them can dam-

age the circuit boards and can cause the speakers to work improp-

erly.

Keep the speakers away from dust and dirt, which can cause pre-

mature wear of parts.

Wipe the speakers with a damp cloth occasionally to keep them

looking new. Do not use harsh chemicals, cleaning solvents, or

strong detergents to clean the speakers.

Modifying or tampering with your speaker system’s internal components can

cause a malfunction and might invalidate its warranty and void your FCC autho-

rization to operate it. If your speaker system is not operating as it should, take it

to your local RadioShack store for assistance.

CLEANER

40-1372.fm Page 7 Tuesday, August 10, 1999 3:25 PM

RadioShack

A Division of Tandy Corporation

Fort Worth, Texas 76102

1A7 Printed in China

SPECIFICATIONS

TRANSMITTER

Operating Frequency Range ...................................................912.5–914.5 MHz

Power Source .................................................................18V DC, 150 milliamps

SPEAKERS

Frequency Response.....................................................................50 Hz–15 kHz

S/N Ratio ................................................................................................... 55 dB

Stereo Separation ................................................................................. ≥ 20 dB

Audio Distortion .......................................................................................... ≤2%

Operating Range ..............................................................150 Feet (Open Field)

Automatic Frequency Control (AFC) ................................. More than ±150 kHz

Tuning Range ....................................................................... ≥913.5 ±1.25 MHz

Minimum Volume Hum ............................................................................ < 2mV

Bass Boost Effect (100 Hz) .................................................................... 8 ±2 dB

Power ...........................................................................................10 Watts RMS

Power Source .................................................................15V DC, 800 milliamps

Speaker Elements ..............................................2-Inch Tweeter, 4-Inch Woofer

Specifications are typical; individual units might vary. Specifications are subject

to change and improvement without notice.

SUPPLIED ACCESSORIES

Audio Patch Cord

Y-Cable

1/8-to-1/4-inch Stereo Adapter

AC adapters

RadioShack Limited Warranty

This product is warranted against defects for 90 days from date of purchase from RadioShack company-

owned stores and authorized RadioShack franchisees and dealers. Within this period, we will repair it without

charge for parts and labor. Simply bring your RadioShack sales slip as proof of purchase date to any

RadioShack store. Warranty does not cover transportation costs. Nor does it cover a product subjected to mis-

use or accidental damage.

EXCEPT AS PROVIDED HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED

WARRANTIES ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRAN-

TIES CONTAINED HEREIN. Some states do not permit limitation or exclusion of implied warranties; there-

fore, the aforesaid limitation(s) or exclusion(s) may not apply to the purchaser.

This warrant

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ou specific le

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from state tostate.

We Service What We Sell 10/95

40-1372.fm Page 8 Tuesday, August 10, 1999 3:25 PM

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