© 1999 Tandy Corporation.
All Rights Reserved.
Optimus and RadioShack are registered trademarks us ed by Tandy Corporation.
Cat. No. 40-1407
AMX-4 Portable Amplified Speaker System
Your Optimus AMX-4 Portable Ampli-
fied Speaker System lets you take ex-
cellent stereo sound with you almost
anywhere. You can connect the
speakers to any personal audio
source, such as a cassette player, por-
table 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 bat-
teries.
Follow these steps to install batteries
in each speaker.
1. Lift the tab on the battery compart-
ment cover in the direction of the
arrow and remove the cover.
2. Install two C batteries as indicated
by the polarity symbols (+ and –) in-
side the compartment.
3. Replace the cover.
4. Repeat Steps 1–3 for the other
speaker.
Note: If the sound becomes weak or the
red indicator dims, replace the batteries.
Caution: To avoid damage to the sys-
tem, remove the batteries if you do not
plan to use the speakers 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 volts DC and delivers at
least 500 milliamps. Its center tip
must be set to positive and its plug
must correctly fit the system's DC 9V
500 mA jack. Using an adapter that
does not meet these specifications
could seriously damage the system
or the adapter.
40-1407.fm Page 1 Monday, August 30, 1999 11:31 AM