Harman Kardon HK 990

HARMAN KARDON

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

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