EV Eliminator Floor Monitor Speakers
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 sys-tem with excellent vocal reproduction and ex-tended 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 mode 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 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 sel 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 300-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 300-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 box-tuning frequency, while the acoustic output decreases rapidly. There-fore, to protect the Eliminator Monitor and maximize the power output of the system, it is necessary to insert an active 45- to 80-Hz high-pass 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 high-quality 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 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 dimension-ally stable, water resistant and free from voids. A combination of dado-cut joints and tough adhesives ensure a sonically dead enclosure free from panel resonances. The densely woven, industrial-grade, abuse-resistant carpeting provides a finish 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, wide-bandwidth 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 dependable coverage with-out "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 out-put 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 one-third-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. Bandwidth of the system utilizing the complete one-third-octave polar data is shown in Figure 6. Directivity factor, R , and directivity index, D i , are plotted in Figure 7.
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, real-life conditions. The EIA Loudspeaker Power Rating Full Range (ANSI/EIA RS-426-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 Monitor passes ANSI/EIA RS-426-A 1980 with the following alues:
| R SR = 5.10 ohms (1.15 x R E ) | P E (MAX) = 300 watts | Test voltage = 39.10 volts rms, | 77.33 volts peak (+6dB) |
The "peak" power-handling capacity of a woofer is determined by the peak test voltage amount. For the Eliminator Monitor, a 77.33- volt-peak-test voltage translates into 1,200-watts short-term peak power-handling capac-ity. This is the equivalent of four times the "average" power-handling capacity, and is a peak that can be sustained for only a few milli-seconds. However, this sort of short duration peak is very typical in speech and music. Pro- vided the amplifier can reproduce the signal accurately, without clipping, the woofer will also perform accurately and reliably, even at these levels.
Amplifier Power Recommendations
As noted in the Power Handling Capacity section, above, the Eliminator Monitor has a random-noise power capacity of 300 watts long-term (1,200-watts peak) per ANSI/EIA RS-426-A 1980. The following guidelines will help relate this to an appropriate power amplifier output rating.
1. To use the Eliminator Monitor to full capacity, skilled experts in sound-system installation and operation will obtain the best results if the power amplifier is 2.0 to 4.0 times the long-term average noise power rating of the speaker system. For the Eliminator Monitor this is 600 to 1,200 watts.
The caution cannot be made strongly enough, however, that this arrangement is only for experts or those who can discipline themselves against "pushing" the system for ever-higher sound levels and who can avoid "accidents" such as catastrophic feedback or dropped microphones.
2. A more conservative, "normal" amplifier size, which will produce audible results nearly equal to those of the "expert" recommendation, is 1.0 to 1.4 times the long-term average noise power rating of the speaker. For the Eliminator Monitor this is 300 to 450 watts.
3. To be very conservative, one can use an amplifier rated at 0.5 to 0.7 times the long-term average noise power rating of the loudspeaker. For the Eliminator Monitor this is 125 to 175 watts. Request P.A. Bible Addition No. Two ("Power-Handling Capacity") for more back-ground on these recommendations.
- 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°
- 300-watt long-term rms power capacity
- Dual 1/4-inch phone jack or dual Neutrik Speakon ® inputs
| Specifications
Typical Axial Frequency Response, Swept Sine Wave, 4 volts at 3.05 meters (10 feet), (anechoic environment, normalized for 1 watt at 1 meter; see Figure 1): 77-20,000 Hz (half space) Low-Frequency 3-dB-Down Point: 77 Hz (half space) Usable Low-Frequency Limit (10- dB-down point): 65 Hz (half space) Efficiency: 3.3% Long-Term Average Power-Handling Capacity per EIA Standard RS-426-A 1980 (see Power-Handling Capacity section): 300 watts (1200 peak) Maximum Woofer Acoustic Output: 8.3 watts Sensitivity (SPL at 1 watt, 1 meter input, anechoic environment, swept sine wave): 99 dB Dispersion Angle Included by 6-dB-Down Points on Polar Responses, Indicated One-Third-Octave Bands of Pink Noise (see Figure 6), 4,000-20,000 Hz, Horizontal: 55° (+18°, -9°) 4,000-20,000 Hz, Vertical: 80° (+21°, -21°) |
Directivity (Q), 800- to 16,000-Hz Median (see Figure 7): 15.7 (+23.8, -8.8) Directivity Index D i , (D i = 10 log 10 R (Q)) 800- to 16,000-Hz Median (see Figure 7): 12.0 dB (+4.0 dB, -3.6 dB) Distortion, 0.1 Full Power Input, (see Figure 2) Second Harmonic, 100 Hz: –27 dB, 4.7% 1,000 Hz: –35 dB, 1.8% 10,000 Hz: –19 dB, 11.4% Third Harmonic, 100 Hz: –36 dB, 1.6% 1,000 Hz: –44 dB, 0.6% 10,000 Hz: –34 dB, 2.1% Transducer Complement, Low Frequency: DL15BFH High Frequency: DH2010A driver HP85M constant-directivity horn Box-Tuning Frequency: 60 Hz Crossover Frequency: 2,000 Hz |
Crossover Slope: 12 dB per octave Impedance, (see Figure 3) Nominal: 8 ohms Minimum: 5.1 ohms Input Connections: Two parallel 1/4-inch phone jacks (Two parallel Neutrik Speakon ® NL4MP connectors on Eliminator Monitor (E)) Enclosure Materials and Colors: Black carpet-covered Road-Wood™ Black perforated metal grille Dimensions (see Figure 4) Width: 640 mm (25.39 in.) Height: 406 mm (15.98 in.) Depth: 471 mm (18.53 in.) Net Weight: 19.5 kg (43 lb) Shipping Weight: 22.7 kg (50 lb |