Electro-Voice ELIMINATOR M EDS User Manual
Eliminator
®
Monitor
Floor Monitor
• Exclusive Ring Mode Decoupling
(RMD™)
• Integral stand adaptor
• PRO™ circuit provides HF driver
protection
• Constant-directivity 80° x 55° horn
• Usable monitor angles of 50° and 65°
• 350-watt long-term rms power
capacity
• Dual 1/4-inch phone jack or dual
Neutrik Speakon
1
See Connections section
®
inputs
1
Description
The Electro-Voice Eliminator
350-watt 2-way floor monitor that incorporates Electro-Voice's exclusive ring mode
decoupling (RMD) technology. The
Eliminator monitor features a constant directivity 80° x 55° horn in a vertical orientation that provides usable monitor angles
of 50° and 65°. The combined professional
quality Electro-Voice manufactured components arrange in a horizontal array with
a very durable/road worthy light weight
enclosure. The result is a very high performance system with excellent vocal
reproduction and extended bass response.
The Eliminator Monitor incorporates
Electro-Voice's exclusive ring mode
decoupling technology. This technology
deals with the common resonance or "ringing modes" found in all loudspeaker systems. It deals with mechanical modes utilizing mechanical solutions, and deals with
acoustical resonant or ringing modes utilizing acoustical solutions. The result is
substantially cleaner vocal reproduction
and a response that is more uniform
regardless of input level conditions.
The system uses the newly developed
®
Monitor is a
DL15BFH low frequency driver to provide
both extended low frequency response
and cleaner fundamental vocal reproduction. It also utilizes the DH2010A high
frequency pure Titanium driver coupled
to a constant directivity 80° x 55° horn to
produce extended high frequency
response and low distortion upper vocal
reproduction.
The Eliminator Monitor features a self resetting high frequency protection circuit,
EV's PRO circuit. This is included with
the high quality passive network to prevent accidental high frequency overload
and improve system reliability. The bass
section of the Eliminator Monitor is designed using Thiele Small optimized parameters for a solid performance to 77 Hz.
In addition to including RMD techniques,
the 15'' (381 mm) DL15BFH woofer is specially designed to provide extended 350-watt
continuous (1200-watt peak) power handling. These power handling ratings are
achieved using a 6 dB crest factor which
provides peak levels 4 times that above the
continuous rating of 350-watts.
The Eliminator Monitor also features
a stand mount adapter on the woofer
side for vertical orientation (standard
1 3/8 diameter.)
Speaker Protection
The Eliminator Monitor, like all other
vented systems, experiences rapidly increasing cone excursion below the boxtuning frequency, while the acoustic output decreases rapidly. Therefore, to protect the Eliminator Monitor and maximize
the power output of the system, it is necessary to insert an active 45- to 80-Hz highpass filter into the circuit. The filter should
have a slope of at least 12 dB per octave.
Such subpassband filters are found in many
crossovers and equalizers manufactured
by Electro-Voice, as well as other commercially available equipment.
Enclosure Construction
The Eliminator Monitor enclosure is constructed of Road-Wood, a structural
material that combines the strength of highquality plywood with the density and
acoustic damping of particle board without brittleness. Road-Wood uses the
same principle of crossbanding veneers,
as in plywood, in order to achieve its very
high rigidity. A tough liquid-phenolic resin
is blended with long, narrow strands of
Eliminator
®
Monitor
hardwood. Alternate layers are perpendicularly bonded under intense heat and
pressure to form panels of superior uniformity. Unlike many grades of plywood,
Road-Wood is dimensionally stable,
water resistant and free from voids.
A combination of dado-cut joints and
Monitor
tough adhesives ensure a sonically dead
®
enclosure free from panel resonances.
The densely woven, industrial-grade,
abuse-resistant carpeting provides a fin-
Eliminator
ish that is both attractive and highly durable. Heavy-duty corner protectors, firmly
secured rubber feet, recessed handles and
a protective metal grille complete the picture and ensure that the Eliminator Monitor speaker system is ideally suited to a
long and reliable life on the road.
Frequency Response
The combination of a 15-inch woofer, widebandwidth high-frequency driver and an equalized crossover results in the wide and smooth
overall response shown in Figure 1. This response was measured at 3.05 meters (10 feet),
using a 4-volt swept sine-wave input in an
anechoic chamber. No external equalization
was used. Figure 1 has been averaged and
corrected for 1 watt at 1 meter.
Connections
The Eliminator monitor is equipped with two
parallel 1/4-inch phone jacks. (The Eliminator Monitor E version has two parallel Neutrik
Speakon
®
NL4MP connectors.) Another system can be connected in parallel by using the
other connector. Care must be taken not to
abuse the amplifier by connecting impedances
which are too low.
Constant-Directivity Speaker System
The crossover frequency and speaker component geometries have been selected so that the
directional characteristics of the woofer and
constant-directivity horn match at the crossover
frequency to create a special system type
the constant-directivity system. At higher frequencies the vertical coverage pattern remains
constant and the horizontal pattern
smoothly transitions to a 55° angle above
5,000 Hz. Response within the 80° x 55° rated
coverage angle is uniform, which means
2
dependable coverage without hot spots
or dead zones at certain frequencies. The
80° x 55° dispersion characteristic also
helps avoid early reflections from nearby
surfaces which could degrade performance. The controlled directivity of the
high- and low-frequency transducers also
eliminates response irregularities caused
by diffraction off nearby enclosure edges
and, in combination with an essentially flat
on-axis frequency response, produces a
total acoustic power output that is uniform
with frequency.
Directivity
A unique feature of the Eliminator Monitor is the constant-directivity dispersion
provided by the 80° x 55° horn. The polar
response of the system at selected onethird-octave bandwidths is shown in Figure 5. These polar responses were measured in an anechoic environment at 6.1
meters (20 feet) using one-third-octave
pink-noise inputs. The frequencies selected are fully representative of the polar
response of the system. Beamwidth of the
system utilizing the complete one-thirdoctave polar data is shown in Figure 6.
Directivity factor, R
D
, are plotted in Figure 7.
i
and directivity index,
,
Power-Handling Capacity
Electro-Voice components and systems are
manufactured to exacting standards, ensuring they will hold up, not only through
the most rigorous of power tests, but also
through continued use in arduous, reallife conditions. The EIA Loudspeaker
Power Rating Full Range (ANSI/EIA RS426-A 1980) uses a noise spectrum which
mimics typical music and tests the thermal and mechanical capabilities of the components. Electro-Voice will support relevant additional standards as and when
they become available. Extreme, in-house
power tests, which push the performance
boundaries of the woofers, are also performed and passed to ensure years of
trouble-free service.
Specifically, the Eliminator passes ANSI/
EIA RS-426-A 1980 with the following values:
R
= 5.175 ohms (1.15 x RE)
SR
P
= 350 watts
E(MAX)
Test voltage = 42.55 volts rms,
85.10 volts peak (+6dB)
The peak power-handling capacity of a
woofer is determined by the peak test voltage amount. For the Eliminator Monitor, a
85.10-volt-peak-test voltage translates into
1,400-watts short-term peak power-handling
capacity. This is the equivalent of four times
the average power-handling capacity, and
is a peak that can be sustained for only a
few milliseconds. However, this sort of short
duration peak is very typical in speech and
music. Provided the amplifier can reproduce
the signal accurately, without clipping, the
woofer will also perform accurately and reliably, even at these levels.
Amplifier Recommendations.
The power-handling rating of the Elimina-
®
Monitor is 350-watts continuous. The
tor
specific tests used employ a crest factor
(ratio of peak energy to continuous energy) of at least 6 dB. During extended
testing, the Eliminator
®
Monitor is routinely
subjected to peak levels far in excess of its
continuous rating of 350 watts. Many amplifier designs are capable of producing
peak power levels in excess of their ratings
as well, so exact pairing of loudspeaker
rating and amplifier ratings is not necessary. Amplifier continuous ratings of 250
watts to 400 watts are suggested. Larger
amplifier ratings are recommended for maximum dynamic range, but it should be recommended that amplifier continuous levels (as opposed to peak levels) be within
the range quoted for the Eliminator
®
Moni-
tor long-term average power-handling rating.
Service
In the unlikely event the Eliminator Monitor requires service, the woofer and driver
can both be replaced or serviced from the
front. A service data sheet is available from
Electro-Voice.
Architects and Engineers
Specifications
The loudspeaker shall be a compact
vented-box type. The low frequencies
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