Clarion APA2103 User Manual

I
clarion APA2103 .. ~
Amplifier Inputs/Controls/Power Indicator
The APA2103's front panel (see Figure 2) ha s dua l sp ea ker-level input
connections, dual-RCA input jack s, a GAIN control for input level
adjustment , BASS EXTENDER control, HPF and LPF controls for setting
crossover filter frequencies, a FILTER se lecto rf switch, a MODE switc h for
STEREO or MONO operation , and POWER indicator.
c==> c:=:> c=::> c==::::') c::=:> c=:=:> <=::::::::::> <:::::::::>
~ BASS HPF lPf
-.- ~ ~ ~ ~~1~t ll ~ ~·
SY 0.1 0 A 12 60 Htl(IQ liO 1tt:!OO 1.PF>FFOFf MONO Sf£111!0
Figure 2 . Front panel layout of the Clarion APA2 l 03 .
Line-Level/Speaker-Level Inputs
The APA2103's gold -p lated RCA input jacks, labeled L (CH 1) and R (CH 2),
-. provide connections for a line-level stereo source. In addition , speaker -le vel
·. connections are provided for installations where the source unit's RCA outputs
are unavailable (see Specifications on page 17 for wire codes).
Gain Control
· The GAIN control allows you to set the nominal operating l eve l of the
amp l ifier. The amplifier's wide range, 200 m V to 5 V for RCA inputs or
400 m V to 10 V for speaker-level inputs , can accommodate input levels
from virtually any brand of source unit.
Bass Extender Control
The APA2103 also features a "hig h-Q " (i.e., nai.Tow frequency band)
BASS EXTENDER circuit that is active in all modes of operation. It acts
much like an equalizer, with adjustable gain (from 0to+12 dB) fixed at
40 Hz . Use this feature to precisely tune low-frequency audio response to
compensate for a less-than-ideal s ubwoofer enclosure design . The added
boost produces rich, full bass tones that are normally difficult to reproduce
in the car audio environment.
4 • Description
~ - , OPERATION/INSTALLATION MANUAL
High-Pass/Low-Pass Filter Controls
The APA 2 I 03 has a 12 dB per octave electronic filter for preci se frequency
attenuatio n with minimal phase distortion and can be s et for high-pass or
low-pass operation. The steep crossover slope keeps midran ge tones out of
the s ubwoofer to eliminate an unnatural " nasal " tone quality in the audio
sys tem. It is fully adjustable between 50 and 200 Hz (via the LPF or HPF
control) and is activated by s liding the FILTER switch to either HPF or LPF
(or OFF when filtering is not required). Use these controls, along with your
speake r manufacturer's recommended crossover frequencie s, to quickly
design a more advanced system (see Applications starting on page 6).
Stereo/Mono Mode Switch
The MODE switch provides selection of stereo or mono operation.
Connections for Speakers/Power
The APA2103's rear panel (see Figure 3) contains speaker and power
connections and an external fuse.
Figure 3. Rear panel layout of the Clarion APA2 l 03.
Speaker Connections
The s peaker terminals are gold-plated with polarity markings for CH 1 (L),
CH 2 (R), and MONO speaker connections.
Power Connections
The power connections are also gold-plated and ai ·e labeled REMOTE (for
remote turn-on via source unit) , GROUND , and BATTER Y ( +12 Vdc). An
a utomotive-type 20A fuse protects the amplifier circuit.
Description• 5

Clarion APA2103 Specifications

Power Output

maximum power output	230 watts
continuous average power output at 4 ohms	50 watts x 2
continuous average power output at 2 ohms	75 watts x 2

Audio Specifications

frequency response	10 Hz to 50 kHz
signal-to-noise ratio	100 dB or better
input sensitivity (low-level RCA)	200 mV to 5 V

Physical Specifications

dimensions (W x H x L)	230 mm x 47.5 mm x 2.0 mm
current use at rated output	14 amps
speaker load capacity	4 ohms