Introduction
INTRODUCTION
Congratulations on your choice of the
Harman Kardon HK 990 Integrated Amplifier.
In order to obtain the best performance from this
integrated amplifier, please be sure to read this
owner's manual and use your integrated ampli-
fier only in accordance with its instructions.
The special features, of this unit include:
In terms of raw power, the HK 990 is the most
muscular amplifier ever to carry the
harman/kardon
®
name, more than capable of
driving the most demanding loudspeaker loads
without breaking a sweat. But the HK 990’s
awesome power is nothing if not highly refined,
extending beyond watts and amps. With a choice
of discrete optical or coaxial inputs or an analog-
only signal path, as well as fourth-generation
Real-Time Linear Smoothing (RLS IV), 2.2-chan-
nel EzSet / EQ room optimization, dual subwoofer
outputs and an audiophile-quality phono preamp
section, the HK 990 offers a combination of fea-
tures you will find irresistible. Others, of course,
may simply hunger for all that power. We under-
stand completely.
High Current Capability provides the •
instantaneous current necessary to precisely
drive and control nearly any loudspeaker
system
Ultrawide-bandwidth amplifier design for •
improved transient accuracy and phase
linearity
Low negative feedback for further improved •
dynamic accuracy
Use of discrete electronic circuitry to provide •
the highest performance level
Dual-path technology allows for pure analog •
or pure digital audio processing within the
same product
EzSet / EQ room optimization for quick and •
accurate system setup, optimized for two
channels and two subwoofers
Symmetric (balanced) XLR analog inputs offer •
lower noise levels and higher Signal-to-Noise
performance
RLS IV digital-to-analog conversion •
technology, with dual conversion using two
stereo AD1955 high-grade DACs in Dual
Mono configuration
The HRS link allows Harman Kardon CD •
players to lock themselves to the external
clock of the amplifier for a jitter-free
connection, similar to having the CD playback
inside the amplifier
Dual differential input stages with their •
own high-voltage supply, resulting in high
gain and low noise as well as high channel
separation
Cascoded predriver stage considerably •
reduces high-frequency distortion, allowing
crystalclear high frequencies, free from any
harsh sound
Thermal Tracking Mechanism using •
ThermalTrak™ output stage transistors that
include internal temperature sensors to bias
the current of the output stage in real time
Sophisticated electronic protection circuitry •
guards the amplifier from short-circuit or
from damaged speakers and wires, without
impairing sound quality, by using current
limiting or output relays
DC servo to ensure that the DC level of the •
amplifier output will stay within a contained
limit at any condition
Multiple protection circuits will switch the •
amplifier off in case overcurrent, overvoltage,
overtemperature or DC protection is detected
Dual toroidal transformers and up to •
15.000µF of supply filtering per channel
for high channel separation and tight bass
control, even with low-impedance loads
Dual-line dot-matrix display•
Record out available in both digital and •
analog domains (two analog outputs and one
coaxial digital output)
A/B speaker switching•
IR remote extension jacks for control of the •
amplifier when placed in a cabinet
Harman Kardon system remote for control of •
compatible Harman Kardon CD players and
tuners
Accessory list
Owners Manual•
Remote Control + •
4 AAA batteries
EzSet Microphone•
Power cord•
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