Radio Shack 85 - Manual (Page 2)

2
FEATURES
Your Optimus 85
×
4 High Power 4-
Channel Trunk Mount Amplifier is de-
signed to produce a total of 340 watts
to give added punch and power to
your vehicle’s existing stereo sys-
tem.
The amplifier produces up to 85
watts per channel of clean, powerful
sound at all audio frequencies with
minimum distortion. You can adjust
the crossover frequency for both
channels 3 and 4 when using only
two speakers and a subwoofer, so
you can emphasize the bass sounds
but not lose the other sounds or pow-
er. You can connect your autosound
system’s line-level or speaker level
outputs to the amplifier.
Its features include:
14k Gold-Plated Noise-Isolated
Line-Level Input Jacks
-
let you
connect low-level (pre-amplifier) sig-
nal inputs to match your autosound
system’s output for the best high-fi-
delity performance.
14k Gold-Plated Speaker Termi-
nals
-
designed for low impedance,
high conductivity, and minimum cor-
rosion to provide the highest signal
transfer and lowest sound distortion.
Input Level Controls
-
let you adjust
the level of the audio signals that en-
ter the amplifier.
Automatic Power Switching
-
auto-
matically turns on/off the amplifier
when you turn on/off your autosound
system.
Bridging Capability
-
lets you com-
bine the amplifier’s four 85-watt
channels so you can use the system
with only two channels that produce
a total of 170 watts from each chan-
nel.
Crossover Frequency Circuit
-
lets
you adjust the crossover frequency
from 45
-
400 Hz for both channels
three and four when you use only two
speakers.
Crossover Frequency ON/OFF
Switch
-
lets you set the amplifier to
drive a connected subwoofer.
Automatic Thermal Protection
System (ATPS)
-
automatically low-
ers the amplifier’s output power
when the amplifier’s internal temper-
ature reaches 202×F then increases
the output power when the amplifier
cools down.
© 1995 Tandy Corporation.
All Rights Reserved.
Optimus and Radio Shack are registered trademarks used by Tandy Corporation.
12-1977.fm Page 2 Tuesday, July 13, 1999 10:07 AM