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OMI
MONITOR
OWNERS
MANUAL
INTRODUCTION
The amt
from all other
An
an exceptionally
Monitor is
extremely
ESS
"open"
cially designed
per
devised
and bass
tion. Bass
cabinet of
radiator.
18
dB
driver result in improved
performance
exceptionally large
the ultimate
speakers
sounding bi-polar
high transmission 12"
for
this system.
octive crossover
ESS loudspeaker. lt is sonically distinguished
by its unmatched excellence.
Heil air-motion transformer couples to
Bextrene
A newly designed
that integrates the
performance
assured by a structurally
and by a
below 30
internal volume
midrange
Hz is
Carefully reading the Owner's Manual will help
thoroughly understand the achievement
The
sents.
ing listening
tations and
SINGLE
excellence
conditions
provide
AMPLIFIER
The input connector
crossover
accept bare
At this time switch
pair
panel
wire
of speakers simultaneously with
drive more than four
Speaker Connection".
"lamp"
gauge
18
gauge
wire if
your
you
demand
your
ESS
a lifetime of listening
your
of
at the rear
require
and
your
ESS
the
of
no attachment hardware.
electronics
speakers with a 4-channel unit, turn to
"zip"
or
cord is recommended for most installations.
speakers
will
be
amt Monitor speaker will exceed
CONNECTION
speaker.
All double strand connector wires
positive
colored cord has one conductor length that is
ridges.
speaker and the corresponding negative
insulated
should be connected
The input terminals
insulation
insert
wire strand touches any
electronics. Shorting
not
channel output terminals, the right to the right.
Once the leads
(+)
leads can
Connect
be easily
the
ridged wire to the negative
cord contains silver and copper
to
the negative
at the rear of the
the wire
otf
the stripped wire. Release
you
are
connecting.
portion
of an amplifier's output
covered by the warranty.
properly
are
connected,
identified
the cap to secure the wire. Be
of the ad
Connect the left
your
yours.
will
be
pleasure.
Monitor is located
amt
The
terminal
you plan
lf
OFF.
your
stereo receiver, or
in
excess of 25 feet from
are coded to insure that
along the length
smooth and
post
on
colored
(Black)
terminal.
speaker are spring loaded. Strip 7a inch
Press
jacent
can
your
system
frequency
low
driver, spe-
diaphragm and
air-motion
free
front mounted
you properly
transformer
phase
of
reinforced
connect and
amt Monitor speaker
Even
under the
posts
to drive more than one
most
your
the recessed
on
are designed to
you plan
if
your
electronics.)
ground (-)
the
ol
cord. Solid
length that has
one
(Black)
your
inward on the
terminal on the
electronics.
wire. The
plastic
Most
copper
certain
terminal
speaker
at the speaker or the
potentially
cause damage
to the
is ready
to turn on. I N P
amplifier
a newly
distor-
passive
repre-
exact-
expec-
"Multiple
(Use
and
clear
wire
cap and
that no
left
16
to
of
UT T E RMI
AL
N
CON N
ECTION
page
't
PHASING
your
lf
speakers seem
possible
check
that they have inadvertently
proper
lor
your
Switch
source
sound seems to
receiver or
position yourself
and
properly phased.
from side to side as
phase.
The
problem
to image
phasing,
emanate clearly
However,
you
can
ONE of the speakers. Switching to
natural sound that
SPEAKER
A
speaker's
bearing on
passive
placed
placing
by
five feet apart. Placement near
tend to make the
seems excessive, try moving the
Aside
want to
placement possibilities.
limit
The
furnishings in
sound. Large windows,
characteristic of
cally optimized by opposite absorptive
room
the
radiator
directly against the
both
from
not
experiment with
you
PLACEMENT
placement
quality
provides
speakers
placing
"live"
the
of
bass dominate
the amt Monitor
room
your
room can
paneled
rooms. ldeally, highly reflective
poorly
or if
been connected OUT OF
follow
preamplifier
procedure:
this
to the MONO mode.
equidistantly
from
between the two speakers, they are
hear a broad vague sound which leaps
head
move
easily
if
your
you
be corrected by
stereo should reveal
have
come to expect of
and its
sound that
orientation
you
unexcelled imaging
wall.
Generally,
along
plane, parallel
one
corners will augment bass response but may
the
rest of
speaker a
also
directly
if
importantly
placement
walls and wooden floors
surfaces.
and carpeted rooms lacking any reflective
non-reverberant
absorptive
ment
most
surfaces
with speaker and
pleasing.
"dead".
or
will tend to
decor
Rooms
placement
with a balance between reflective and
be most acoustically ideal. lf
to obtain a sound
the
bass seems inadequate,
in front
off center,
of the speakers. lf the
your
reversing
proper
to
listener has a major
hear. The front
the
and allows
optimal stereo
the
audio spectrum. lf the bass
few feet
in
your
room
imaging is
to each other no less than
away
a corner,
and
affect how
surfaces are acousti-
Heavily
surfaces tend to be acoustically
draped, upholstered
PHASE.
Select a
speakers are out of
the connections to
stereo
placement
the
from the
you
furnishings do not
and/or
possible,
quality
program
the
dramatic,
imaging.
speaker to be
obtained
corners.
probably
will
your
speakers
ceilings
experi-
you
that
of
it
To
the
are
find
is
CONTROLS
A Presence/Brilliance
for
acoustic
control
near the input terminals. Variable
deficiencies that may
is located
Control
on the
is
recessed
provided
exist in
crossover
attenuation
with
the
amt Monitor to compensate
your
listening
panel
from +3
environment.
at the rear
dB to
of
-
the
speaker
r
occurs in a
page
The
2
!
shelflike, linear
1200 Hz to
treble
control will usually only roll
fashion
beyond
Presence/Brilliance
midrange frequencies
electronic's
relative
Any
adjustment of
tion
since this region should
acoustical environments. Severe
can dramatically affect the
yond
ers
seems
towards
marked
provide
treble
to equalization and room acoustic
audibility. lf the midrange
lacking,
the DECREASE
OPTIMAL RANGE
the linear,
MULTIPLE
These ESS
and
above 4 Ohms, but can develop
Connecting
ably drop
should not
speakers
basic amplifiers
an additional set of speakers
the system impedance
be connected in
(as
23 kHz.
Control
opposed to rolling off the high
Roll off characteristic
will
may
and
be used along with or in conjunction with
control to achieve desired high
the
control should slarlfrom the
provide
performance
always check the control to
or
position:
should
balanced sound
SPEAKER CONNECTION
have a nominal
have
no difficulty whatsoever
parallel.
speakers in the A & B mode with
system impedance
A
second set of speakers may
keeps the
will handle the load
questions
system impedance aboye 4
you
may
Switching boxes are
dealer
can
diagrammed
speakers
you
help
below and should
your
to
ESS speakers.
the 4 Ohm level.
below
be connected lN
properly.
Your
have about multiple
also available which simplify
obtain
such a box. The
be used if
end) from about
the typical
frequencies
off
of
above 5 kHz. The
component
be especially valuable for controlling upper
your
performance
1200 Hz to
your
of
severely
quality
sound
the
amt
posi-
Control
be-
speak-
turned
the region
and
Monitor.
effects.
the flatest
reduction of
of
high
frequency
Moving
dramatically
you
can expect from
impedance
frequency
OPTIMUM RANGE
frequency response in most
the Presence/Brilliance
the
speaker
see if they are
from
performance
the control towards
improve the
of 6 Ohms. Most receivers
with impedance loads
problems
another set of
dealer
if the load drops
to these ESS
4
below
you
lf
own a
Ohms;
receiver,
speakers might drop the
Ohms, assuring that
SERIES. Series connection
help
can
to clarify
connections
series connections;
below 4 Ohms.
speakers will
prob-
consequently, they
your
driving
your
and answer any
your
to
ESS
electronics
speakers.
your
basic series connection is
you plan
to connect another
set of
Connecting
connection lN
procedure.
manufacturer
you
Once
ple
Driving
nof
understand the ramifications
speakers,
the loudspeakers
advisable. Driver
equipment,
warranty.
speakers
Used
system
additional
SERIES. You may use the
you
lf
of
return to
have
your
speakers
questions,
4-channel
"Connecting
with
to
receiver.
sine wave
failure from
or owner neglect
properly,
should
will not
the rugged, reliable
provide
a lifetime
a 4-channel receiver
diagram above
it is wise
Your
excessive
be covered
to contact
procedure
and
Speakers."
signals
input levels,
at high dB
under the
components in
of outstanding
will also require
model for
as a
your
dealer or the
this
of connecting multi-
levels
output
faulty
electronic
conditions of the
your
service.
ESS
page
is
SER/ES SPEAKER
3
CONNECTION
COMPONENTS
THE AIR-MOflON
air-motion
transformer
for resonant free, improved
rates a focus
produces
and
the superb
TRANSFORMER.
features a refined, newly designed Teflon diaphragm
plate
an extremely airy,
performance
array
that
midrange response. The bi-polar amt incorpo-
evenly envelops
the 12 inch
of
and rear dispersion characteristic
striking
the Heil
Conventional
design
driver
is revolutionary.
the Monitor's cabinet.
of
is
superior
midrange
to
other
high frequency
and
highly susceptible to diaphragm
driven at certain
drive frequency.
energy,
another signal
blunting transient attack and causing overhang.
ens up,
resonating frequency to rise in frequency. This change in frequency, or
variation, is
One can
nately, this entails
frequencies, it
This
vibration,
is introduced
like a rubber
major factor in
a
avoid resonance by
band stretched between
making the diaphragm massive and difficult to drive.
at
"masking"
making the diaphragm
The
12 lb.
"open"
the diaphragm in magnetic
sound that magnificently blends with
Bextrene
the
of
bi-polar design
precision,
The
designs because the air-motion transformer
drivers, unlike the
resonance. When
begins to change shape
known
as diaphragm resonance, absorbs
the
time the resonating
same
clarity.
(5.87
15
oz.
bass driver.
efficiency
a cone,
"in
points.
two
absolutely
kg)
bi-polar
Excellent
is
assured by
and clarity
Heil driver,
for instance, is
sympathy"
with the
Moreover, when
diaphragm
This forces the
rigid. Unfortu-
A more effective way to avoid resonance is by distributing the driving
When
a driving force is distributed uniformly
surface area,
effectively
occur.
The diaphragm
Its
surface area is
bonded to the
to close or
is
sucked
far
as the escaping
transformation ratio
The
Heil's
First, it
Heil's
cannot
pleats
they
themselves
short,
gain
This
diaphragm motion
moving mass
momentum
energy
it
supports
made rigid without
of the
pleat
along their
open
in
forced
or
pleat
action has two major
eliminates the
pleat
walls are totally drive-supported
bend out of shape
force
the air out,
precise
diaphragm
or
-
of
generated
to the
air efficiently at all
The Heil transformer's
spectacular dispersion
the diaphragm at
Heil
folded
air-motion transformer incorporates
into
walls move with the electronic
entire
out the open end. The
thus reducing
air,
is thus 5 to 1.
possibility
to
they
move
creating a large, high velocity
-
movement.
"transformation"
is important because it
-
the
diaphragm.
by
pleated
by virtue of its small radiating
extra weight. Resonant
vertical
deep
length.
of diaphragm or cone resonance.
go
into resonance.
move the air much
of 5
The Heil
conventional one-to-one drivers, transferring
frequencies.
configuration has
over a diaphragm's entire
point.
The
diaphragm
vibrations
Conductive aluminum strips
signals, causing the
pleats
expand or contract, air
walls move
of flexing. The
simply do not
both concepts.
only one
air-motion
As the
possibility
the
every
pleats.
pleat
advantages over conventional cones.
by the aluminum strips,
Since
Second, when
farther
times
the air motion to 1 times the
drastically
the
faster
and
-
motion from
air
reduces the
Heil's deep
effective
builds up only a fraction of the
the added
advantage
source. Conventional
Heil
field
side
the
are
tight-
pitch
force.
moving
is
thus
pleats
fifth
the
they
than
-
of
as
a
of
page
4
speakers
comparison
waves
central
air-motion transformer
configuration.
solid
sound
Definitive
the inherent
remain
BEXTRENE
driver
supports a7 \b.61/z oz.
is vacuum formed to
styrene compound of exceptional
reproducing
that
sound
the
on
other side, narrowing the
This makes
beam.
With
a 120'horizontal
expanse
of
stereo
stage can be
clarity, freedom from resonance,
enjoyed from virtually
benefits of superior design.
yet
to
be realized.
LOW FREQUENCY DRIVER A 12 inch
is
constructed
on a heavy cast
extremely close tolerances out of Bextrene, a
developed by the BBC for
cones, Bextrene is a compound that
ity,
clean
tics. A newly developed
damping to the moving
Extremely high
with high temperature
All
the features
of
articulate
PASS/yE
Monitor is driven
works in the
diaphragm is much
result, low frequency
than when
tion
the wooler
of
passive
The
lence of the 1 2" Bextrene
passive
with
bass
propagation
wave
power
handling
epoxy on an aluminum former.
into
same
using a
built
the
by
way
lower than that
distortion is lower
ported
bass below 30 Hz
RADIATOR.
where it
radiator in
radiator
provides
a resulting effect
midrange
similar
waves from
speaker
this
avoids
imagery to frequencies
(3.36
kg)
ceramic
studio
with low mass and
dual support system
assembly.
is assured by
lhe 12" Bextrene
and
The front mounted
motional energy
port
as a
system.
belongs: in a tuned
conjunction with large
driver delivers
clearer imaging
greater
of
frequencies
one side of the diaphragm interfere with
speaker's clean output
placement
side cancellation
pattern
at 20,000 Hz, the Heil maintains
any
and
For
aluminum, open
magnet
physical properties.
reference
combines unexcelled transmission veloc-
incisive
driver combine
clarity in the higher registers.
'12"
the
of
except that
moving
of air
when usi ng a
passive
The
bass below 30 Hz. The front mounted
and more impactful
integrity
sonic
are usually so wide by
to
a constricted
extremely critical. The Heil
because of
beyond
point
in
full-range
audibility. A
the listening field.
sound dispersion
its
compact
spacious
conventional speakers, they
(30.48
back
structure. The cone surface
Bextrene was orginally
systems. Unlike
excellent damping characterisÂprovides
copper voice
a2"
passive
woofer. The
velocity
the
through
passive
radiator
system within the
cabinet volume and the
low frequency
cm)
frame
that
typical
additional rigidity
coil bonded
produce
to
radiator
a
keeps the
on
passive
of the
typical
radi
ator system
your
radiator
passive
port.
back
box.
and unified
and coherence.
a
-
rigidly
poly-
paper
and
deep
amt-
As a
radia-
excel-
FREQUENCY DIVIDING NETWOBK.
type
proper
bass driver.
are individually
lmproved
assured
Bextrene
most
severely
A Presence/Brilliance
the
cabinet near the input
acoustic
Controls)
per
18 dB
operation of the large Heil air-motion transformer
Besistors,
phase
new
by a
woofer.
effective range and
frequency
octave
capacitors
quality
controlled to
linearity
at the crossover
crossover that
Steep crossover slopes integrate
provide
deteriorate midrange definition.
Control is
terminals.
deficiencies that may
A newly designed
dividing network at 1000 Hz
and air core inductors
assure uniform operation throughout.
smoothly
freedom from
provided
The Control will help
exist in
point
in
integrates
with the
your
sophisticated
assures the
and the 12" Bextrene
the highest
of
a critical midrange region
the Heil
both drivers within their
phase
interference
Monitor
amt
amt and the
that
at the rear
compensate for
listening
environment.
parallel
caliber
can
(See:
page
is
of
5
BIAMP CONNECTION
terminal inputs are
Screw
biamplified through
amplifiers
tions bypass
former and low
are completely
and damping
are
for each stereo configuration.
the
built-in
frequency
isolated" Biamplification
factor, and
significantly
enhanced.
There are two critical
1) The straps
built-in
ing the
your
to
leads.
2)
CROSSOVER
to
set
Crossover
per
cause damage
fall
under warranty coverage.
For optimal
crossover
To
connect
and connect the
tive
and
NOTE: Always make connection
has
error
likelihood
When used bi-amplified,
air-motion
woofer.
more than adequate to
you
lf
desire
your
from
whom they were
from
passive
leads
biamp
amplifiers,
deliver only
slopes at
slopes should not be used.
octave
performance
point
the amt Monitors in the biamp mode,
positive
negative terminals for HF & LF speaker
placed
the wrong frequency
of damage occurring
transformer
An
amplifier
further
amt Monitor speakers, contact
purchased
provided
the use of an active electronic
passive
driver.
reduces
(See:
requirements for biamp connection:
crossover
crossover only, and
to HF
&
remove these straps before connecting
FREQUENCY:
frequencies of
18
dB
to the Heil driver which
and safety,
maintained when biamping the amt
be
negative leads from
and
it is recommended that the amplifier driving
of lesser
be
with half the rated
drrve the Heil transformer.
assistance
and he will be
for
applications
The amt Monitor
crossover
When
biamplified,
increases a speaker's dynamic
phase
shift distortion.
Advantages of Biamplification)
output to speaker
MUST BE REMOVED
LF
speaker
lt is
crucial
1000 Hz
per
octave are strongly
in which
crossover and
for
direct
input
input terminals. To avoid damage
your
that
or above
Frequencies
is identifiable
ESS recommends that the
remove the terminal straps,
your
input.
to the woofer first. ln the event that a
through the two leads there
band
to the woofer.
power
rated
output of
in
obtaining optimum
output
that driving the woofer
the
authorized
glad
to advise
the
amt
HF and LF connec-
access to the
the Monitor's
Clarity and
for
are
when
electronic
to the Heil transformer.
recommended. Six dB
below
ESS and does not
by
Monitors.
amplifiers to
than the
one
bi-amp
ESS
you.
Monitor is
power
two
Heil trans-
two drivers
range
definition
with the
use
connect-
any biamp
crossover be
Hz will
1000
1000 Hz
posi-
the
wiring
is less
the Heil
driving the
will
be
performance
from
dealer
'i
ADVANTAG ES
The
best argument in favor
of
with
than the higher
time, their values add
form
have
the
very
nature
the music we normally
of
of
frequencies of various amplitudes or values
lower frequencies
the
(fig.
sufficient
sum
3). To
of their
(fig.
2). When two or more frequencies are
or subtract
properly
"head
room," the ability to amplify the
peak
amplitudes.
BIAMPLIFICATION
OF
biamplification. An average music
generally producing
(fig.
1)
from
reproduce this wave form, a
each other
desire
across
to reproduce
program
the audible spectrum,
greater
much
present
to
a composite wave
create
power
signal
amplifier
without clipping
provides
consists
amplitude
at the same
must
page
the
6
A
system driven by only one amplifier can clip even when
played
being
and it inevitably will
relates to the
from
one amplifier is separated by a
lower frequency
relatively
on the composite wave
distorted during the
Had the high and low frequencies been separated
prior
to reaching
still exhibit clipping
pletely
There is
amplifier unit
will
be
required to handle all frequencies with a
point,
in
channel
per
channel @ 8 ohms
stereo
two channels!
There are a number
components between the
damping
produces
overs,
Passive
impedance load with
amplifier to the load;
virtue
that reduced
components as heat.
Furthermore,
the
output
damping factor
source impedance
crossover).
at low volume. When an amplifier reaches
(fig.
percentage
small
(which
(fig.
4)
of distortion of that cycle. When the incoming
probably produced
but the
5);
form
period
their respective
unaffected.
another benefit
less than that necessary for
the
8 ohms, when combined with another
@
basis
factor
tighter,
distortion;
to
need no longer
ESS
Series Eclipse 500C stereo
biamplification: since, in a biamping mode, a single
in
equivalent to a 750 watt
additional
of
speaker and
of the overall system, are eliminated;
cleaner bass with far less
crossover components
net
a
effect of reducing the
overall
the increased
of
power
that same series impedance
impedance
effective total impedance,
is dissipated, with no
of the
of the system
which now includes the impedance
-
percentage
the
-
passive
frequencies which
upper
are completely eliminated
(tig.
of clip
6).
power
the high frequencies, however,
handle a composite
comparable
a biamp configuration,
single-channel amp - or 1
advantages, as
the
operate directly in
power
supplied by the amplifier is reduced
power
(derived
amplifier and
by
of
a
crossover, the distortion
clipping in the first
amplifiers, the low frequencies might
passive
by an electronic crossover
signal,
performance
crossover network.
amplifier
basic amplifier at
give
well. Power-wasting
which
amp,
overhang than
efficiency of coupling from the
and a significant
useful output, by the crossover
passive
the
of
dividing the load
program
the clipping
given
cycle
were superimposed
or
power
rated
a total capability on a
also severely
material is
that is
place)
at least
would be com-
requirements
from an
250
at
,440
biamping, therefore,
passive
with a low-
series
components adds to
seriously degrades
impedance
of the
point
-
clipped
signal
the
of
may
be
seriously
amplifier
As a case
per
watts
125 watts
watts for
passive
the
affect
cross-
by
portion
the
by the
passive
of
.ttAAAP-sAA/
CABINET
The
veneer exterior
enhance
walnut
of
ture
dusting
speaker
your
oil
stain
the
walnut
finish treatment
surface can be maintained
sprays and strong abrasive
surfaces.
CARE
your
of
decor. The woodwork is
and is then hand
such as the non-aerosol
ESS
speaker
sanded
compounds should
is
carefully
first carefully
a high
quality
with
and enhanced
"Scott's
crafted and finished to
oiled with
wax. The
by a
Liquid Gold."
not be used on the
a
periodic
Silicone
Danish
beauty
furni-
page
7
SERVICE
The
dealership
any complaint
your
lf
dealer cannot be contacted,
you
tomer Services, and
o
The model and serial number of
o
The dealer from
chase, and,
.
A
specific
o
Associated equipment
description of the
you purchased your
where
may have and
include
possible, your phone
if
the following information:
your
whom
(including
arrange for
can
please
write ESS, lnc. Attention: Cus-
your
speakers.
speaker was
problem.
number.
RMS
power
ESS
speakers
any
purchased,
ratings of
necessary servicing.
with the speakers.
lf ESS deems return to the factory necessary,
and be sure to use the
Once repaired,
your
"Authorized
will
unit
Return"
be returned
please
labels which ESS will
freight
ship freight
prepaid.
LIMITED THREE.YEAR WARRANTY
When ESS
contained
materials
and
speakers
in the
that occurs
date of original
applies only to the original
authorized dealer, except where
sibilities are to
factory authorized
your
lf
speakers are removed from the
distributors
obligated
andlor authorized dealers
the terms
by
warranty will be made at the discretion
This warranty is
if
repair has been attempted
addition the warranty does not
age. The right is further reserved to re-adjust
specifications without notice
and
previously purchased
ify
ranty
any responsibility for
Retention
under the terms of the warranty. Any
not
constitute
three
SALE to either
your
rights
your
of
year
proof
warranty
under the warranty
are used in accordance with the written instructions
Owner's
purchase
provide proof
void
Manual, ESS will
in normal
use for a
without charge for
and is
owner
prohibited
purchase
of
service
facility in the
this warranty. Any repairs
of
if
the serial
numbers
any unauthorized
by
repair any defect in
period
of
parts
or
contingent upon
law. The
by
transportatlon to the ESS
and
event that repair
country
in
of
of
original
any subsequent
the
have
under the
distributor or dealer.
removed or defaced,
been
person
36
labor. The warranty
cover tampering, abuse or accidental dam-
prices
or design
and without incurring responsibility to
systems.
ESS
specifically excludes
consequential damage.
ORIGINAL
purchase
of
period,
an authorized warranty station
BILL
and will not be regarded as
only
policy
SALE is required to obtain
OF
card or other form of registration does
presentation
your
of
the factory itself will insure
or
described above.
ORIGINAL BILL OF
can best verify
the date of
your
amp) used
prepaid
provide.
workmanship
months from the
purchase
owner's
is
from
respon-
required.
purchase,
country are
terms
of
or agency.
parameters
from
such.
mod-
this war-
service
During the
pur-
an
ESS
not
this
or
ln
page
8
SPECIFICATIONS
FULL
SYSTEM
POWER
CAPACITY
NOMINAL IMPEDANCE
DISPERSION
CROSSOVER FREGUENCY
SENSITIVITY
AMPLITUDE-FREQUENCY RESPONSE
CONTROLS
PRESENCE/BRILLIANCE Continuously variable
HEIL AIR-MOTION TBANSFOBMEH
TOTAL RADIATING
SQUARE WAVE RISE TIME
TRANSFORMATION RATIO
MAGNET ASSEMBLY WEIGHT
FLUX DENSITY
LOW FREQUENCY DRIVER
NOMINAL DIAMETER
CONE MATERIALS
MAGNETIC ASSEIVBLY WEIGHT
FLUX DENSITY
VOICE COIL
INSULATION
PASSIVE RADIATOR
NOMINAL DIAMETER
DIAPHRAGM
MATERIAL 5 in. risid EPS
1 watt input
AHEA
produces
87 dB sound
21.5 in.2
(5.08
2 in.
damping skin of .250"
cm) Copper bonded with high temperature
styrene
(clean
watts
375
120" Horizontal, 30' Vertical
pressure
at a distance of
+3
attenuation
(139
fodm
lrom +3
1,200 Hz
(equivalent
cm.2)
15 microseconds
5.3:1 velocity increase
12 lbs. 15
7 lbs.6Y2 ozs.
epoxy to an
Single
base ,"t",'5,Jrfl3i33 ifl
open cell
free
powe0
music
ohms minimum
6
1,000 Hz
1
dB 30-23,000 Hz
dB
to beyond audibility
12 in.
aluminum
polythermaleze
resonance:
air
meter
*
to
lrom
-
to an 8" cone)
at 5,000
(5.87
oz.
4,500
Gauss
(30.48
cm)
Bextrene
(3.36
10,500 Gauss
former
foam.
Unitary
5
Hz
kg)
kg)
Hz
FINISH
GRILLE COLOR
DIMENSIONS
SHIPPING WEIGHT
39.25 in.
IMPORTANT
ESS
is constantly researching new materials,
sign refinements which may be introduced into
notice
or obligation. For this reason,
some respects from its
performance
of the original design.
published
any current ESS
description
(99.7
cm) H X 15.63 in.
X 15.88 in.
production
existing
methods
product
product
will
but
always equal or exceed
Oiled Walnut
Black-brown
(39.7
cm)
(40.3
cm) D
103.5 lbs.
(47
and de-
lines without
may
differ
W
kg)
in
E})-iJIC.
96]3 ootes
drve' socromento,
co.
95827
PRiNTEDINUSN
148-2422
(lr{.*-
\toz
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