Infinity Comprehensive Guide to the Kappa 255a Power Amplifier

K A P P A 2 5 5 A P O W E R A M P L I F I E R

The Kappa 255a is a member of Infinity’s new Kappa series of mobile power amplifiers. Housed within the sleek, extruded aluminum frame, you’ll find five channels of amplification – four for full-range, midrange, or high- frequency reproduction and a 200 watt class-D channel to efficiently power a subwoofer. This unique “hybrid” amplifier features a flexible integrated crossover so you can easily configure the Kappa 255a for a front, rear, and constant bass system, or for a three-way system with separate midbass or tweeters.

K A P P A 2 5 5 A A M P L I F I E R F E A T U R E S . . .

The Kappa 255a is a 5-channel power amplifier that offers full-range stereo and bridged-mono operation on four analog channels and band-limited mono operation on a class-D channel for subwoofer applications. The front/rear amplifiers are rated at 50 watts (rms) per channel into a 4- ohm load, while the subwoofer channel is rated at 200 watts (rms) into a 4-ohm load. In bridged-mono configurations, front and rear amplifiers can deliver up to 150 watts (rms) for the same load. The Kappa 255a also features:

•2-ohm operation, rated at 75 watts (rms) per channel for front and rear channels and 300 watts (rms) for the subwoofer channel

•Bridge/stereo switches for fast system setup

•Built-in 12 dB-per-octave electronic crossovers, variable from 32 to 320 Hz, with an “x15” front-channel switch (to increase the frequency range from 480 Hz to 4.8 kHz)

•Dynamic Bass Optimizer™ (DBO) 12 dB-per-octave subsonic filter with variable frequency (20 to 80 Hz) and Q for enhancing subwoofer low frequencies while conserving amplifier power

•Front and rear channels, individually selectable as high- pass, low-pass, or through-pass

•External switch for subwoofer inputs allows direct connection to source units with subwoofer 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 B O U T T H E W A R R A N T Y . . .

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 B O U T T H I S M A N U A L . . .

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 two pages) 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.

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
T A B L E O F C O N T E N T S . . .
A p p l i c a t i o n s	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
S y s t e m E x p a n s i o n	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
P r e c a u t i o n s A n d N o t e s	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
I n s t a l l a t i o n	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
T r o u b l e s h o o t i n g	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 – Infinity Kappa 255a Power Amplifier