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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 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 54a belongs to a related product family,
you’re assured future expansion will look as good as it
sounds.
K APPA 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 bridged-
mono 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, 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
A BOUT 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.
A BOUT 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 com-
ponents 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.
T ABLE 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