Harman Kardon HK 990 User manual

2 x 150W 2.2-channel stereo integrated amplifier
HK 990
Specifications
Harman Kardon®HK 990
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 digital inputs or an
analog-only signal path, as well as fourth-generation Real-Time Linear Smoothing (RLS IV),
2.2-channel EzSet/EQ™room optimization, dual subwoofer outputs and an audiophile-quality
phono preamp section, the HK 990 offers a combination of features you will find irresistible.
Others, of course, may simply hunger for all that power. We understand completely.
Key Specifications
■Audio Section – Continuous Average Power (FTC), (stereo mode): 150 watts per channel into
8 ohms @ 20Hz – 20kHz, <0.07% THD, both channels driven; High Instantaneous Current
capability (HCC): ±200 amps
■Dimensions (H x W x D) and weight: 165mm x 440mm x 435mm (6-1/2" x 17-5/16" x 17-1/8"),
19.6kg
Depth measurement includes knobs, buttons and terminal connections, unless stated otherwise.
Height measurement includes feet and chassis, unless stated otherwise.
Highlights
High-current capability
Ultrawide bandwidth
RLS IV
Digital inputs and outputs
EzSet/EQ room optimization
Balanced XLR inputs
Phono input MM/MC
Dual subwoofer outputs
A/B speaker selection
Heavy-duty binding posts
Dual-path technology

2 x 150W 2.2-channel stereo integrated amplifier
Power
■150W x 2 into 8 ohms, 20Hz – 20kHz, at <0.07% THD, with all channels
driven simultaneously
■High-current (±200 amps), ultrawide-bandwidth (10Hz – 100kHz)
amplifier design
Connectivity
■Six analog stereo audio inputs
■Two analog recording outputs
■Four digital inputs (two optical and two coaxial)
■Dual subwoofer outputs to connect up to two active subwoofers
■One coaxial digital output for recording
■Two real balanced inputs, using XLR connectors
■One HRS (high-resolution synchronization) link
■2.2-channel processor input allows the use of external audio processors
■Two high-quality phono inputs for connection of record players with an
MM or MC cartridge
■2.2-channel preamp outputs allow the use of external power amplifiers
■Remote control input and output
■Heavy-duty binding posts allow for the use of speaker cables up to 10mm2
■Headphone output
Advanced Performance Technologies
■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
■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
■Cascoded predriver stage considerably reduces high-frequency distortion,
allowing crystal-clear 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-circuiting or from damaged speakers and wires, without impairing
sound quality, by using current-limiting or output relays
■DC servo ensures that the DC level of the amplifier output will stay within
a specified 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 16.000μF of supply filtering per
channel will allow high channel separation and tight bass control, even
with a low-impedance load
Ease of Use
■Dual-line dot-matrix display
■Remote 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
HK 990
© 2010 Harman International Industries, Incorporated. All rights reserved. Harman Kardon is a trademark of Harman International Industries, Incorporated, registered in the United States
and/or other countries. EzSet/EQ is a trademark of Harman International Industries, Incorporated. ThermalTrak is a trademark of Semiconductor Components Industries, LLC.
Features, specifications and appearance are subject to change without notice. EAN Code HK 990/230: 0282925063388
Harman Consumer, Inc.
8500 Balboa Boulevard, Northridge, CA 91329 USA
www.harmankardon.com
Features