Infinity 202a User Manual
202a 2-Ch Power Amplifier
Owner’s Manual
Installation Guide
2 – Infinity Kappa 202a Power Amplifier
KAPPA 202A POWER AMPLIFIER
The Kappa 202a is a member of Infinity’s new Kappa
series of mobile power amplifiers. Housed within the
sleek, extruded aluminum frame, you’ll find the latest
advances in circuit topology, along with user
conveniences like a wide-range input sensitivity control,
auxiliary outputs, and a built-in electronic crossover.
With features like these and more, you can quickly try
out a variety of system ideas, and because the Kappa
202a belongs to a related product family, you’re assured
future expansion will look as good as it sounds.
KAPPA 202A AMPLIFIER FEATURES...
The Kappa 202a is a 2-channel power amplifier that offers
stereo, bridged-mono, or tri-mode operation, and is rated
at 200 watts (rms) per channel into a 4-ohm load. In a
bridged-mono configuration, it can deliver up to 600 watts
(rms) for the same load. The 202a also features:
• 2-ohm operation, rated at 300 watts (rms) per channel
• A bridge/stereo switch for fast system setup
• A built-in 12 dB-per-octave electronic crossover,
variable from 32 to 320 Hz
• Dynamic Bass Optimizer™ (DBO) 12 dB-per-octave
subsonic filter with variable frequency (20 to 80 Hz)
and Q for enhancing low frequencies while conserving
amplifier power
• Individually selectable high- and low-pass filters (with
through-pass) for amplifier and auxiliary outputs
• An amplifier input sensitivity control to match a wide
range of input signal levels from 250 mV to 9 V
• Separate power supplies for each channel
• Five protection levels guard against over-voltage,
under-voltage, over-power, over-temperature, and
over-current situations
• 2-color LED array indicates green when power is on
and orange when protection is activated
• Industrial-grade, gold-plated, “pre-wire and plug-in”
connectors for an easy-to-install high-quality interface
• Transparent control cover to deter tampering yet
provide a clear view of installation settings
• Built-in automotive type fuses to protect the amplifier
• Unibloc™ chassis provides improved heat-sink
capacity and exceptional RFI shielding characteristics
ABOUT THE WARRANTY...
You’ve selected a premium product that offers superior
performance and advanced materials, resulting from over
25 years of car audio design.This Infinity product is made
with our ongoing dedication to creating the best consumer
audio products possible. As a result, you can expect your
new Kappa Power Amplifier to provide you with many
years of listening enjoyment.
All Infinity Automotive Products carry a limited parts
and labor warranty (see the enclosed warranty card), so
retain the bill of sale to protect your purchase and to aid
us with any service-related questions you may have.
ABOUT THIS MANUAL...
To attain maximum amplifier performance, we encourage
you to read the remaining pages before installing and
operating your new Infinity Kappa Power Amplifier.
Especially review the Applications section (on the next
page) for ideas on designing a system. Also, save these
instructions for future reference.
IMPORTANT: Installation of automotive stereo components can require extensive experience in performing a
variety of electrical, and mechanical procedures. Although
these instructions explain how to install a Kappa Power
Amplifier in a general sense, they do not show the exact
installation methods for your particular vehicle. If you do
not have the experience, do not attempt the installation
yourself; instead ask your Authorized Infinity Car Audio
Dealer about professional installation options.
TABLE OF CONTENTS...
Applications ..................................................3
System Expansion...........................................4
Precautions And Notes .....................................5
Installation ...................................................6
Troubleshooting..............................................8
DECLARATION OF CONFORMITY
We, Infinity Systems A/S
Kongevejen 194B
DK-3460 Birkerød
DENMARK
declare in own responsibility, that the product described in this
owner’s manual is in compliance with technical standards
EN 55013/A12/8.1994 and EN 55020/12.1994.
Steen Michaelsen
Infinity Systems A/S
Birkerød. DENMARK. 3/97
Owner’s Manual/Installation Guide – 3
APPLICATIONS
For your convenience, we’ve included several application
diagrams to help you plan your own system installation.
Figures 1 through 3 show how to configure the Kappa 202a
for stereo, bridged-mono, and tri-mode operation.
For system expansion ideas, see the next page.
NOTE: For simplicity, Figures 1 through 3 do not show power,
remote, and input connections.
Figure 1. This wiring diagram
shows a Kappa 202a amplifier
set to stereo to drive a pair of
full-range speakers.
Figure 2. This wiring
diagram shows a Kappa
202a amplifier set to
bridge (mono) to drive a
single subwoofer.
Figure 3. This wiring diagram
shows a Kappa 202a amplifier
set for tri-mode operation. For
a desired crossover frequency,
use the chart to select a lowpass inductor for the subwoofer, and corresponding
high-pass capacitors for left
and right speakers.
KAPPA 202a
(rear panel)
REM
–
R
+–+
L
-
+
Subwoofer
Set Mode Switch To
BRIDGE
(on top panel)
Set Filter Switches
(on top panel)
FREQUENCY INDUCTOR CAPACITOR
Crossover 6 dB/oct. LP 6 dB/oct. HP
(4 ohm) (4 ohm)
75Hz 8.0 mH 530 µF
100 Hz 6.4 mH 400 µF
125 Hz 5.0 mH 318 µF
150 Hz 4.2 mH 265 µF
175 Hz 3.6 mH 227 µF
200 Hz 3.2 mH 198 µF
Set Mode Switch
To STEREO
(on top panel)
Set Filter Switches
To FLAT
(on top panel)
KAPPA 202a
(rear panel)
-
+
R Speaker
REM
R
L
+–+
–
-
+
L Speaker
Set Mode Switch
To STEREO
(on top panel)
Set Filter Switches
To FLAT
(on top panel)
KAPPA 202a
(rear panel)
R
R Speaker
Subwoofer
REM
+
Inductor
L
+–+
–
L Speaker
-
CapacitorCapacitor
-
+
+
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