Optimus AMX-4 User Manual
40-1407.fm Page 1 Monday, August 30, 1999 11:31 AM
Cat. No.
AMX-4 Portable Amplified Speaker System
Your Optimus AMX-4 Portable Amplified Speaker System lets you take excellent stereo sound with you almost
anywhere. You can connect the
speakers to any personal audio
source, such as a cassette player, portable CD player, or radio with a
1
/8-inch
jack. Its bass and treble boost controls
let you adjust high and low frequency
response for enhanced sound.
CONNECTING POWER
Using Batteries
You can power the system from four C
batteries. For best performance, we
recommend RadioShack alkaline batteries.
Follow these steps to install batteries
in each speaker.
1. Lift the tab on the battery compartment cover in the dir ection of the
arrow and remove the cover.
2. Install two C batteries as indicated
by the polarity symbols ( + and –) inside the compartment.
3. Replace the cover.
4. Repeat Steps 1–3 for the other
speaker.
If the sound becomes weak or the
Note:
red indicator dims, r eplace the batteries.
Caution:
To avoid damage to the system, remove the batterie s if you do not
plan to use the speak ers for a month or
more, or if you plan to use AC or DC
power.
Using AC Power
You can power the speakers from a
standard AC outlet with an AC adapter
(not supplied), available at your local
RadioShack store.
Cautions:
• You must use an AC adapter that
supplies 9 volt s DC and delivers at
least 500 milliamps. Its center tip
must be set to positive and its plug
must correctly fit the system 's
500 mA
does not meet these specifications
could seriously da mage the system
or the adapter.
jack. Using an adapter that
40-1407
DC 9V
Optimus and RadioShack are registered trademarks used by Tandy Corporation.
©
1999 Tandy Corporation.
All Rights Reserved.
40-1407.fm Page 2 Monday, August 30, 1999 11:31 AM
• Be sure you connect the adapt er as
instructed, and disconnect the
adapter from the AC outlet before
you disconnect it from the system.
Otherwise, the unconnected plug
might touch some metal and damage the adapter.
Follow these steps to po wer the system
from an AC outlet.
1. Insert the adapter's barrel plug i nto
the system’s
DC 9V
jack.
2. Plug the adapter into a stan dard AC
outlet.
Using an adapter that does not meet
these specifications could seriously
damage the system or the adapter.
• Be sure you connect th e adapter as
instructed, and disconnect the
adapter from the cigarette lighter before you disconnect it from the system. Otherwise, the unconnected
plug might touch some meta l in the
vehicle and damage the adapter
and/or the vehicle’s electrical system.
Follow these steps to pow er the system
from your vehicle’s battery:
1. If necessary, set the adapter's voltage switch to 9V.
2. Insert the adapte r’s barrel plug into
the system’s
DC 9V
jack.
3. Plug the adapter’s large plug into
the vehicle’s cigarette lighter socket.
Using Vehicle Battery Power
You can power the speakers from your
vehicle's battery with a DC adapter (not
supplied), available at your local RadioShack store.
Cautions:
• Your vehicle must have a 12-volt
DC, negative-ground electrical system.
• You must use a DC adapter that
supplies 9 volts an d del iv er s at lea st
500 milliamps. Its c en ter ti p must be
set to positive, and its plug must correctly fit the system’s
2
DC 9V
jack.
OPERATION
Notes:
• Be sure the audio s ources power is
off and its volume control is set to its
minimum level.
• If the audio source is stereo, the
speaker with th e built-in amplifier is
the right speaker.
1. Insert the speaker system's
miniplug into your audio source's
headphone jack.
1
/8-inch
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