Optimus 42-4031 User Manual

7

1. Plug the 5.5 mm outer-diameter/

2.1 mm inner-diameter barrel plug
into the cable so it reads +TIP.

2. Set the adapter’s voltage switch to

9 volts.

3. Insert the adapter’s barrel plug

into the 

jack on the back of

the Concertmate 410.

4. Plug the other end of the adapter

into the vehicle’s cigarette lighter
socket.

To listen to your Concertmate 410
without disturbing others, you can con-
nect a pair of stereo headphones with
a 

1

/

8

-inch plug (not supplied). Your lo-

cal RadioShack store sells a wide se-
lection of headphones.

To connect a pair of headphones, in-
sert the headphones’ 

1

/

8

-inch plug into

the 

jack on the back of the key-

board.

Note: Connecting headphones dis-
connects the Concertmate 410’s built-
in speakers.

To protect your hearing, follow these
guidelines when you use headphones.

• Set the volume to the lowest set-

ting before you begin listening.
After you begin listening, adjust
the volume to a comfortable level.

• Do not listen at extremely high

volume levels. Extended high-
volume listening can lead to per-
manent hearing loss.

• Once you set the volume, do not

increase it. Over time, your ears
adapt to the volume level, so a
volume level that does not cause
discomfort might still damage your
hearing. 

42-4031.fm  Page 7  Wednesday, August 11, 1999  4:22 PM