Radio Shack 120-2130A - Manual (Page 3)

AM/FM Cassette Car Stereo w/22 Watts x 2 Max Power
(120-2130A) Installation Faxback Doc. # 60663
Preparation
CAUTION: Improper installation can damage your stereo and other components
in your vehicle's autosound system.
Before you install your stereo, read all the instruction's in this owner's
manual. You should be able to answer all of these questions about your
vehicle's electrical and sound systems:
Does my vehicle have a 12-volt negative ground electrical system?
Which terminal in my Vehicle's fuse box supplies power even when the
ignition is turned off?
Which terminal in my vehicle's fuse box is for accessories?
How do I connect a wire to the fuse box?
Also, be aware that installation in your vehicle might require cutting or
modifying your vehicle.
Place the stereo as close as possible to the selected mounting location.
We recommend that you install the stereo by temporarily connecting it to
ground and power, optional components, and your speakers. Then test the
connections. Next, disconnect the stereo, mount it in your vehicle, and
then reconnect it. The instructions in this manual are arranged in this
order.
CAUTION: Be sure your speaker can handle 32 watts of power (16 watts per
channel). Each speaker must have an impedance of at least 4 Ohms
Your local RadioShack store carries a full line of speakers.
Setting the Shaft Spacing
The size of existing openings in the dash or installation kit determines
the best spacing between the stereo's shafts (knobs).
The space between the shafts is preset to 5-13/16 inches (148 mm) at the
factory. You can change the spacing to 5-5/8 inches (142 mm), to 5-3/8
inches (136 mm), or to 5-1/8 inches (130 mm).
Follow these steps if you need to change the shaft spacing.