Infinity Kappa 54a 4-Ch User Manual
54a 4-Ch Power Amplifier
Owner’s Manual
Installation Guide
2 – Infinity Kappa 54a Power Amplifier
The Kappa 54a 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 widerange 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 54a belongs to a related product family,
you’re assured future expansion will look as good as it
sounds.
KAPPA 54A AMPLIFIER FEATURES...
The Kappa 54a is a 4-channel power amplifier that offers
stereo, bridged-mono, or tri-mode operation, and is rated at
50 watts (rms) per channel into a 4-ohm load. In a bridgedmono configurations, front and rear amplifiers can deliver
up to 150 watts (rms) for the same load. The 54a also
features:
• 2-ohm operation, rated at 75 watts (rms) per channel
• Bridge/stereo switches for fast system setup
• Built-in 12 dB-per-octave electronic crossovers, variable
from 32 to 320 Hz
• Individually selectable high- and low-pass filters for all
outputs (with through-pass on amplifier outputs and
front/rear sum on auxiliary outputs)
• Amplifier input sensitivity controls to match a wide
range of input signal levels from 250 mV to 9 V
• Five protection levels guard against over-voltage, undervoltage, 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
KAPPA 54A POWER AMPLIFIER
Owner’s Manual/Installation Guide – 3
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 54a
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.
REM R
– –
+ +
L
R
– –
+ +
L
+
-
+
-
+
-
+
-
Set Front Mode
To STEREO
(on top panel)
Set Front Filters
To FLAT & F+R (on AUX)
(on top panel)
Set Rear Mode
To STEREO
(on top panel)
Set Rear Filter
To FLAT
(on top panel)
KAPPA 54a
(rear panel)
LR Speaker
RR Speaker
RF Speaker
LF Speaker
REM R
– –
+ +
L
R
– –
+ +
L
+
-
LF
System
+
-
RF
System
-
+
Set Front Mode
To STEREO
(on top panel)
Set Front Filters
To HP & F+R (on AUX)
(on top panel)
Set Rear Mode
To BRIDGE
(on top panel)
KAPPA 54a
(rear panel)
Rear
Subwoofer
Set Rear Filter
To LP
(on top panel)
Figure 1. This wiring
diagram shows a
Kappa 54a amplifier
driving front and rear
pairs of full-range
speakers.
Figure 2. This wiring
diagram shows a
Kappa 54a amplifier
driving a front pair of
tweeter/midrange
systems and a rear pair
of full-range speakers.
Figure 3. This wiring
diagram shows a
Kappa 54a amplifier set
for tri-mode operation
to drive a front pair of
tweeter/midrange
systems and a single
rear subwoofer.
REM R
– –
+ +
L
R
– –
+ +
L
+
-
+
-
+
-
LF
System
+
-
RF
System
Set Front Mode
To STEREO
(on top panel)
Set Front Filters
To HP & F+R (on AUX)
(on top panel)
Set Rear Mode
To STEREO
(on top panel)
KAPPA 54a
(rear panel)
LR Speaker
RR Speaker
Set Rear Filter
To FLAT
(on top panel)
APPLICATIONS
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