Description.4; Amplifier Inputs/Controls/Power Indicator - Clarion APA4203 Operation & Installation Manual

OPERATION/INSTALLATION MANUAL
noise when the level is cranked up. Protection circuits safeguard the
amplifier when overheating and speaker shorts or improper load
conditions occur. All connections and controls are on end panels and are
straightforward and easy to understand. We use gold-plated RCA and
barrier connectors to ensure the best electrical connection for your system.
Included are external automotive-type fuses that are easy to replace.
Amplifier Inputs/Controls/Power Indicator
The APA4203's (or APA4162's) front panel (see Figure 2) has SPEAKER
LINE INPUT connections, (RCA) INPUT jacks, a GAIN CHI/2 control,
an INPUT MODE switch, a GAIN CH3/4 control, FILTER CHI/2 and
CH3/4 controls (for setting crossover frequencies for LP or HP filters), a
BASS EXTENDER gain control, and a POWER indicator.
Figure 2. Front panel of a Clarion APA4203 or
APA4162 amplifier. A reference chart (see detail) shows
which inputs are active for a selected mode.
Low-Level/Speaker-Level Inputs
The gold-plated RCA INPUT jacks, labeled CH 1 through CH 4, provide
connections for a low-level front/rear stereo source. In addition, SPEAKER
LEVEL INPUT connections are provided for installations where the source
unit's RCA outputs are unavailable and direct connection to speaker outputs
is the only choice (see Specifications on pages 22 and 23 for wire codes).
Gain Controls
The CHI/2 GAIN and CH3/4 GAIN controls allows you to independently
set the nominal operating levels of the amplifier's front and rear channels.
The amplifier's wide range, 200 mV to 5 V for RCA inputs or 400 mV to
10 V for speaker-level inputs, can accommodate input levels from virtually
any brand of source unit.
Description
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