Krell The-Lat-2005 Owners Reference

LAT

THE LAT SERIES

LOSSLESS ACOUSTIC

TRANSDUCERS

OWNER’S REFERENCE

The LAT Series
Lossless Acoustic Transducers
Owner’s Reference, v05.0

Krell Industries, Inc.
45 Connair Road
Orange, CT 06477-3650 USA

TEL [phone]
FAX [phone]
E-MAIL [e-mail]
WEBSITE http://www.krellonline.com

This product complies with the EMC directive (89/336/EEC) and the low-voltage directive
(73/23/EEC).

This product is manufactured in the United States of America. Krell®is a registered trademark of Krell Industries, Inc., and is restricted for use by

ell Industries, Inc., its subsidiaries, and authorized agents. Kr

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ved. All other trademarks and tradenames ar

eser

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e r

egister

ed to their r

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ell HEAT

, Kr

espective companies.

ellHEAT

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, and LA

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e trademarks of Kr

ar

ell Industries, Inc. All rights

© 2005 by Krell Industries, Inc. All rights reserved P/N 307595-W

Contents

List of Illustrations, page iv

Foreword, page v

A Letter from Dan D’Agostino, page 1

SECTION ONE: About Krell, page 2

The Krell Legacy, Ensuring Maximum Performance,
and Definition of T

SECTION TWO: Unpacking and Placement, page 7

Opening the LAT–1000 and the LAT–C1000 Shipping Crate
Opening the LAT–

Attaching and Detaching the Loudspeaker Grille

SECTION THREE: Anatomy of a Loudspeaker, page 14

Features and Benefits of the LAT Design

SECTION FOUR: Connecting a LAT Series Loudspeaker to Your System, page 22

erms

2000 Shipping Box

SECTION FIVE: Kr

WARRANTY, page 24

RETURN AUTHORIZATION PROCEDURE, page 26

ellHEAT: Home Theater Technology, page 23

iii

List of Illustrations

Figure 1, page 14

LAT–1000 Front Panel and Grille,
Back Panel, Tuned Port, Enclosure, Crossovers

Figure 2, page 16

LAT–2000 Front Panel and Grille,
Tuned Ports, Crossover, Back Panel

Figure 3, page 18

LAT–C1000 Front Panel and Grille, Back Panel,
Enclosure, Crossovers, Leg Assembly and Pivot Mechanism

iv

Foreword

For more than 25 years, Krell components have been the choice of discerning
audiophiles all over the world. Krell customers care deeply about music, and they
demand the most lifelike music reproduction possible. Krell Industries, Inc., was
founded and exists to meet the expectations of those listeners.

Loudspeakers are an integral link in an audio system. With the right loudspeakers,
you hear music with its original definition, precision, and clarity. Krell’s lossless
technology combines the benefits of enclosure design, materials selection, and
electronics design and configuration to ensure that you hear music exactly as it
was recorded—nothing more, nothing less.

With the Lossless Acoustic Transducers (LATs), Krell has achieved its goal: loud­speakers that are uniquely capable of delivering music with the same confidence
and accuracy as other legendary Krell components.

v

A Letter from Dan D’Agostino

Dear Audio Enthusiast,

Thank you for your purchase of the Lossless Acoustic Transducer.

For more than thirty years, I have been designing audio components for audio­philes who share my passion for music and its reproduction. Krell Industries, Inc.
is a viable, dynamic company, with dealers and distributors worldwide, as a result
of my ongoing quest to build the best, most refined audio products available. This
quest has driven me towards a “systems approach”, and the development of the
Lossless Acoustic Transducer (LAT) Series of loudspeakers is an important part of
that approach. Only through the design of complete systems can I insure that
every component meets my standard of excellence.

It is a goal of mine for Krell loudspeakers to enhance your life visually as well as
sonically, and the new LAT–1000, LAT–2000, and LAT–C1000 deliver both excep­tional performance and style. Provocative aluminum cabinetry, together with
advanced driver and crossover technologies yield loudspeakers of extraordinary
capability, providing the listener with a fresh experience of his favorite musical per­formances. Combine these loudspeakers with my Evolution One monaural amplifi­er and Evolution Two preamplifier, and discover a system that exceeds my expec­tations.

I want to share an exciting new direction with you. Work on the Evolution source
under the systems approach at Krell is ongoing, as of this writing. This exceptional
player clearly demonstrates the advantages of the latest audio recording formats,
while elevating traditional compact disc performance to a new level. I urge you to
experience it, when it is released.

My passion for music reproduction and high performance is the passion that
forged Krell Industries, Inc. and sustains me to this day. It is my love of music, art,
and science that informs all my design efforts, and drives me toward great prod­ucts such as the LAT Series of loudspeakers. Thank you for your appreciation of
my life’s work, and for choosing Krell.

Sincerely,

Daniel D’Agostino
Chief Executive Officer

1

SECTION ONE

About Krell

This section describes the Krell Legacy, Krell’s innovative loudspeaker design and
technology, and defines key terms used in this reference.

The Krell Legacy

“I design every Krell component to set the standard

for workmanship, style, and performance.”

High-end audio is a demanding pursuit—an ongoing quest for excellence in
music reproduction that drives equipment manufacturers to strive for the absolute
in design and performance. With a keen understanding of this passionate drive,
Krell Industries, Inc., was founded in 1980.

Over the past 2-1/2 decades, Krell has earned a distinguished reputation for engi­neering innovation and product excellence. The company’s history is replete with
product introductions that have deeply impacted the high-end audio industry. The
most discriminating audiophiles and product reviewers have consistently recog­nized Krell components for standard-setting performance.

Dan D’Agostino

The Lossless Acoustic Transducers (LATs) herald the era of loudspeaker design and
manufacture at Krell Industries, joining the legacy of amplifiers for which Krell is

enowned. For over 25 years, Krell C.E.O. Dan D’Agostino has built amplifiers

r
legendary for their ability to deliver optimum performance for any loudspeaker.
This experience has yielded invaluable insights about the natur
design, which Kr

ell has characteristically incorporated into the LA

The LAT Series of Loudspeakers

ence-caliber loudspeaker

–1000, a r

The LA
that r
made drivers, and a robust, high-power crossover—a loudspeaker capable of
handling the legendar
accuracy and r

T

emains sonically inert, with a baffle that absorbs vibrations and houses custom-

efer

y power of Kr

esolution.

loudspeaker

e of

T Series.

, employs an all-aluminum enclosure

ell amplifiers, while maintaining pin

point

2

The LAT– C1000 high performance center channel, is manufactured with all of
the crossover, enclosure, and driver technologies of the LAT–1000. Designed to be
operated as a full-range loudspeaker, the LAT–C1000 center channel loud­speaker perfectly complements the LAT–1000. Together, these loudspeakers
form the most extraordinary home theater loudspeaker system available.

The magnetic shielding and horizontal driver array of the LAT–C1000 allows for
ease of installation above or below a video screen. In addition, multiple locator
positions in the stand assembly allow for the optimal on-axis setup of the loud­speaker for almost all scenarios.

The LAT– 2000 is a vented two-way loudspeaker designed for a two-channel
system demanding high quality performance in a small space. This loudspeaker
is also the perfect complement to the LAT–1000 and LAT– C1000 loudspeakers
in a home theater system. Crossover, enclosure, and driver technologies used in
the LAT–1000 have been applied to the design of the LAT– 2000.

Unparalleled Sonic Performance

From the first Krell product—the KSA –100—to the present, Dan D’Agostino has
continually “pushed the envelope” of performance in his search for greater amplifier
power, and now, loudspeaker response. His exploration of technologies, driven by
his never-ending quest to elevate the standard of excellence, has resulted in break­through audio designs. Over the years, the Krell line of power amplifiers, including
benchmark products such as the KRS–100, KRS– 200, and the Audio Standard
models, has established a legacy of unparalleled sonic performance. The LAT
Series

brings the Kr

ell level of per

formance to the loudspeaker.

Dan D’Agostino remains committed to the development of new designs and
technologies. And the Krell legacy will continue to evolve with products that deliver
innovative engineering, per

fection in build quality

3

, and outstanding audio performance.

continue

d

(SECTION ONE: About Krell continued)

Ensuring Maximum Performance

The LAT-1000 extends the already impressive performance of the LAT-1 to a new
level. Building upon the foundation of solid aluminum cabinetry and high-current
crossover design that distinguished the LAT–1, the LAT–1000 frequency response
extends 1/3 octave lower than its predecessor. The LAT–1000, LAT– 2000 and
LAT–C1000 have improved midrange resolution, and enhanced high frequency
detail. All designs employ new drivers that featur
handling, and ver

y low distortion.

Innovative Loudspeaker Technology and Design

Crossover

The LAT–1000 and LAT–C1000 crossovers feature robust construction that
divides the circuit among three discrete circuit cards—one each for the woofer,
midrange, and tweeter networks. The LAT– 2000 loudspeaker has a two-way
crossover design, with the woofer and tweeter together on a single circuit board.
Each printed circuit board for a LAT loudspeaker is fashioned of 1/8-inch fiberglass
with 4-ounce copper traces for superior current flow. Air core inductors and
banks of potted WIMA capacitors ensure tight tolerances and high linearity during
high power levels.

e greater range, better power

Enclosure

Continuing in the tradition of the Master Reference Subwoofer, a LAT Series
loudspeaker enclosure is constructed entirely of aluminum. “Aluminum is the best
material for the job,” C.E.O. Dan D’Agostino explains. “Other than concrete and
lead, which are not practical choices, aluminum is the only material that possesses
the ideal combination of str
Within the audio passband, our cabinets are sonically inert—something you cannot
say about any wood or wood derivative.”

Kr
as purposeful as it is beautiful. Computer
wave interference. A rear-firing, tuned port on the LAT–1000 is precision machined.
A
sure that is immune to vibration. Articulating spikes allow the LAT–1000 to be pre-

uctural rigidity and r

s knowledge of aluminum extr

ell’

substantive aluminum baf

esonance damping characteristics.

usion technology has yielded an enclosur

-optimized geometry eliminates standing

ear plates, bottom, and top comprise an enclo

fle, r

e that is

-

4

cisely leveled for the most accurate imaging and reduced vibration. A special sub­enclosure in the LAT–1000 and LAT–C1000 houses the drivers for the midrange
and the tweeter. This computer-modeled, welded aluminum case effectively iso­lates the midrange and tweeter from the main enclosure while providing an ideal
operating environment for the midrange drivers.

The LAT–C1000 enclosure is fashioned out of solid aluminum billet and extru­sion, creating an operating environment for the drivers that is free of induced vibra­tions. The loudspeaker has a special advantage in the crucial midrange frequen­cies: it is optimized for dialogue, the single most important job of a center chan­nel speaker. The LAT–C1000 maintains the voice matching necessary to recreate
seamless multi-channel front staging. Heard through the LAT–C1000, dialogue is
natural sounding and clearly distinguishable from the rest of the audio program.

The LAT– 2000 construction is based on the same engineering principles that distin­guish the LAT–1000. The all-aluminum enclosure features wall thickness ranging
from 0.75 to 1.0 inch. The curvature of the cabinets is designed to absolutely mini­mize the effects of internal standing waves and external high-frequency diffraction.
The vented cabinet of the LAT– 2000 features two rear bass ports. The LAT–2000
ports are precisely dimensioned, flared, and positioned with respect to the woofer
to eliminate turbulence while providing the correct acoustical loading.

Drivers

The LAT–1000 and LAT–C1000 tweeters are a 1’” ring radiator design with a
machined aluminum faceplate and phase plug. The 5.25” midrange drivers fea­ture magnesium cones coupled to a rubber surround, and an injection molded
metal basket that is extr

emely rigid as well as acoustically transparent. The 8”
woofers are designed with low loss linear suspension and aluminum cones, and
a unique spider configuration dampens driver-born resonances. All drivers have
very high power handling characteristics.

The LAT–2000 tweeter is identical to the LAT–1000 tweeter. The 7” mid-bass driv­er features a sliced paper cone and, like the LAT–1000 woofer, has an injection
molded metal basket that is extr

emely rigid as well as acoustically transpar

ent. A

large motor promotes ample bass extension and midrange accuracy.

5

continue

d