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****** Page 1 ****** Electro%ice SPECIFICATIONS Frequency Response, 10 Feet on Axis, Anechoic Environment, ± 3 dB: 54-3.200 Hz Low-Frequency -3 dB Point: 54 Hz Usable Low-Frequency Limit, -IOdB Point: 40 Hz Half Space Reference Efficiency: 6.2% Long Term Average Power Handling Capacity: 400 Watts Maximum Woofer Acoustic Output: 25 Watts Sound Pressure Level at 1 meter, 1 Watt Input, Anechoic Environment: IOOdB Dispersion Angle nominal, Horizontal and Vertical: 50-200 Hz Essentially Omnidirectional Transducer Complement: DL15X Recommended Crossover Frequency: 125-150 Hz Impedance: Nominal: 8 Ohms Minimum: 6.6 Ohms Input Connections : Two Parallel Speakon Connectors Material: Enclosure: Black carpet covered Road Wood”/ Grill: Black metal grill, removable Optional Accessories: Mounting Pole ECS P Dimensions: 70.0cm (27.6 in) high 47.0cm (18.5 in) wide 45.0 cm (17.7 in) deep Net Weight: 30.0 kg Shipping Weight: 33.0 kg DESCRIPTION The ECS 15-1 is a 400 Watt sub woofer speaker system designed to supplement ECS Series of speaker systems. Designed according to the analysis of Theile- Small this system is characterized by high efficiency, low distortion, and an excellent low frequency performance in a relatively small enclosure size. Especially designed to match the other loud- speaker systems in the ECS series both in width as well as cosmetics the ECS 15-1 is the ideal low frequency extension to the ECS 12-2, and other systems. With the optional ECS P mounting pole fitted to the top of the cabinet, systems such as the ECS 12-2 can be mounted at an ideal height without the use of a separate speaker stand. USE IN MULTIPLES The ECS 15-1 may be used in multiples to increase acoustic output. A 6-dB increase in maximum acoustic output occurs when two ECS15-1 Sub woofer • Subbass system for ECS Series Systems. • Extended bass response. • 400W power handling capacity. • High excursion DL15X woofer. speaker systems are located side by side. For operation at very-low-frequencies, the woofer cones mutually couple, acting as one system with twice the effective cone area and power- handling capacity of a single system. Efficiency is doubled by the increased cone area to provide 3-dB more output, while the doubled power capacity provides the potential for an additional 3-dB gain in maximum acoustic output. Mutual coupling occurs when the center-to- center distance between woofers is less than one-half wavelength. When the woofers are spaced greater than one-half wavelength, as would occur if two ECS 15-1 were widely spaced, the level increase is limited to the 3-dB input power increase. ENCLOSURE CONSTRUCTION The ECS 15-1 enclosure utilizes 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. Altemate 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, tough adhe- sives, and proper bracing ensure a sonically dead enclosure free from panel resonances.

****** Page 2 ****** 100 z 90 80 20 1 kHz 2 FIGURE 1 Axial Frequency Response 5 10 20 The densely-woven, industrial-grade, abuse- resistant carpeting provides a finish that is both attractive and highly durable. A solidly constructed, one piece, removable metal grill protects the front of the system. Firmly secured rubber feet and recessed handles complete the picture and ensure that the ECS 15-1 speaker system is ideally suited to a long and reliable life gon the road”. FREQUENCY RESPONSE The ECS 15-1 frequency response was meas- ured at ten feet, using a four-volt input in an anechoic chamber, and was measured using a swept 1/3-octave pink noise signal. No extemal equalization was used. Note than when the ECS 15-1 is used in a half space environment (ie on the floor) the output at the low end is raised by 3 dB as an effective mirror image of the speaker is created. CONNECTIONS The ECS 15-1 is equipped with Neutrik SpeakontU NL4MPR connectors. Two con- nectors are installed in parallel allowing additional ECS 15-1’s to be installed. One mating Speakont’•• connector NL4FC is sup- plied with each system. These connectors are locking, self-polarizing and capable of 30 amps rms continuously. Additional connectors and cables can be purchased from your dealer. GRILLE REMOVAL The grille assembly of the ECS 15-1 is fastened to the enclosure using four sturdy dual-lock fasteners. The grille assembly can be removed quickly and easily, allowing access to the drivers, by firmly pulling on the two black polyester ribbon loops provided. SUBPASSBAND SPEAKER PROTECTION Below the enclosure tuning frequency, cone excursion increases rapidly. Since acoustic output is also falling rapidly, there is no advan- tage in driving the system with signals much below the tuning frequency. While such signals may be in the program material, they are often such as from record surface extraneous irregularities or a dropped microphone. High- output subwoofer systems such as the ECS 15-1 should be protected with a 40Hz high-pass filter having 12-dB-per-octave rolloff. Subpassband filters are found in many commercially available crossovers and equa- lizers, such as the Electro-Voice XEQ-3. CROSSOVERS AND AMPLIFIERS To achieve optimum performance, the ECS 15-1 should be used with an active crossover having a crossover frequency of 100 to 250 Hz with a minimum slope of 12-dB-per-octave. The output of the crossover is then connected to a power amplifier which drives the speaker system. A power amplifier with a rated output between 400 and 800 watts RMS is recom- mended for optimum performance. While it is acceptable to use amplifiers with less output, maximum acoustic output will not be achieved. A passive crossover with similar charac- teristics can also be used. POWER HANDLING CAPACITY To our knowledge, Electro-Voice was the first U.S. manufacturer to develop and publish a power test related to real-life conditions. First, we use a random noise input signal because it contains many frequencies simul- taneously, just like real voice or instrument program. Second, our signal contains more energy at extremely high and low frequencies than typical actual program, adding an extra measure of reliability. Third, the test signal includes not only the overall “long-term average” or “continuous” level which our ears interpret as loudness but also short- term peaks which are many times higher than the average, just like the actual program. The long-term average level stresses the speaker thermally (heat). The instantaneous peaks test mechanical reliability (cone and diaphragm excursion). Note that the sine wave test signals sometimes used have a much less demanding peak value relative to their average level. In actual use, long-term average levels exist from several seconds or greater, but we apply the long-term average for several hours, adding another extra measure of reliability. Specifically, the ECS 15-1 is designed to with- stand the power test described in the ElA Standard RS-426A. The ElA test spectrum is applied for eight hours. To obtain the spectrum, the output of a white-noise generator (white noise is a particular type of random noise with equal energy per bandwidth in Hz) is fed to a shaping filter with 6-dB-per-octave slopes below 40 Hz and above 318 Hz. When mea- sured with the usual constant-percentage bandwidth analyzer (one-third-octave), this shaping filter produces a spectrum whose 3-dB-down points are at 100 Hz and 1.200 Hz with a 3-dB-per-octave slope abouve 1.200 Hz. This shaped signal is sent to the power amplifier with the continuous power set at 400 watts into the 6.9 ohms ElA equivalent impedance, (52.5 volts true RMS). Amplifier clipping sets instantaneous peaks at 6dB above the continuous power, or 1.600 watts peak (105 volts peak). This procedure pro- vides a rigorous test of both thermal and mechanical failure modes. WARRANTY (Limited) Electro-Voice speaker and speaker systems (excluding active electronics) and accessories are guaranteed for five years from date of original purchase against malfunction due to defects in workmanship and materials. If such malfunction occurs, unit will be repaired or replaced (at our option) without charge for materials or labor if delivered prepaid to the proper Electro-Voice service facility. Unit will be retumed prepaid. Warranty does not cover finish or appearance items or malfuntion due to abuse or operation at other than specified conditions. Repair by other than Electro-Voice or its authorized service agencies will void this guarantee. For shipping address and instructions on return of Electro-Voice products for repair and locations of authorized service agencies, please write: Service Department, Electro-Voice, Inc. 600 Cecil Street, P.O. Box 186 Buchanan, Michigan 49107 (Phone: 616/695-6831), or Electro-Voice West, 8234 Doe Ave., RO. Box 3297, Vlsalia, CA 93277 (209/625-1330,-1) In Europe Mark IV Audio AG, Keltenstrasse 5 CH-2563 Ipsach, Switzerland In Germany Mark IV Audio Hirschberger Ring 45 D-94302 Straubing Electro-Voice also maintains complete facilities for non-warranty sen.’ice. Specifications subject to change without notice. a MARK IV company 2 MARK AUDIO AG Keitenstrasse 5, CH-2563 Ipsach/Switzerland, Phone: 032/516833, Fax: 032/ 5112 21

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ELECTRO-VOICE ECS 15-1 (01) PDF MANUAL

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