Electro-Voice ECS 15-3 User's Manual
Contents
1. Neutrik Speakon NL4MPR connectors Two con nectors are installed in parallel allowing additional ECS 15 3 s to be installed One mating Speakon 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 ECS15 3 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 POWER HANDLING CAPACITY To our knowledge Electro Voice was the first U S manufacturer to develop and publish a power test closely related to real life conditions First we use a random noise input signal because it contains many frequencies simultaneously 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 EIA Standard RS 426A The EIA test spectrum is applied for eight hours To obtain the spec trum 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 measured with the usual constant percentage bandwidth2. the ECS 15 3 is designed using Thiele Small parameters for efficient performance to below 60Hz The 15 inch woofer is a modified version of the DL 15X unit featuring beryllium copper lead wires with an extended length edgewound voice coil further protected by the unique EV Thermo Inductive Ring TIR The part of the magnetic structure adjacent to the coil is insulated using the exclusive EV PROTEF process U S Patent 4 547 632 The coil is driven by a massive 16Ib magnetic structure A specially designed midrange driver enclosed in a separate internal enclosure completes the system ENCLOSURE CONSTRUCTION The ECS 15 3 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 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 tough adhe sives and proper bracing ensure a sonically chamber and was measured using a swept 3 octave signal No external equalization was used CONNECTIONS The ECS15 3 is equipped with
3. 695 6831 or Electro Voice West 8234 Doe Ave P O Box 3297 Visalia CA 93277 209 625 1330 1 dead enclosure free from panel resonances the test signal includes not the overall long In Europe term average or continuous level which Mark IV Audio AG Keltenstrasse 5 The densely woven industrial grade abuse our ears interpret as loudness but also short CH 2563 Ipsach Switzerland v resistant carpeting provides a finish that is duration peaks which are many times higher g both attractive and highly durable A solidly than the average just like the actual program In Germany 8 constructed one piece removable metal The long term average level stresses the Mark IV Audio grill protects the front of the system Firmly speaker thermally heat The instantaneous i Hirschberger Ring 45 g a secured rubber feet and recessed handles complete the enclosure and ensure that the ECS 15 3 speaker system is ideally suited to a long and reliable life on the road FREQUENCY RESPONSE The combination of 15 inch woofer vented midrange and high frequency tweeter provide the wide and smooth overall response shown in Figure 1 This response was measured at ten feet using a 4 volt input in an anechoic 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 avera
4. Electro Voice mm I ri E m SPECIFICATIONS Frequency Response 10 Feet on Axis Anechoic Environment 3 dB 62 20 000 Hz Low Frequency 3 dB Point 62 Hz Usable Low Frequency Limit 10 dB Point 50 Hz Half Space Reference Efficiency 4 5 Long Term Average Power Handling Capacity 300 Watts Maximum Woofer Acoustic Output 18 Watts Sound Pressure Level at 1 meter 1 Watt Input Anechoic Environment 100 dB Dispersion Angle nominal Horizontal and Vertical 500 5000 Hz 120 x 100 Transducer Complement High Frequency HT94 Horn DH2010 Driver Mid Range 6 inch Mid Range Low Frequency Modified DL 15X Box Tuning Frequency 44Hz Crossover Frequencies 600 Hz amp 4 000 Hz Crossover Slope 12 dB per octave impedance Nominal 8 Ohms Minimum 5 0 Ohms Input Connections Two Parallel Speakon Connectors Material Enclosure Black carpet covered Road Wood Grill Black metal grill removable Optional Accessories Model 100 BK Speaker Stand Dimensions 89 5cm 35 2 in high 47 0cm 18 5 in wide 43 5cm 17 1 in deep Net Weight 37 0 kg Shipping Weight 41 0kg ECS 15 3 Three Way Stage System e Three Way compact system with trapezoidal enclosure e High excursion 15 inch woofer e Titanium diaphragm high frequency driver e 300 W power handling capacity DESCRIPTION The ECS 15 3 is a 300 Watt three way high efficiency stage system It combines profes sional quality
5. 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 300 watts into the 7 7 ohms EIA equivalent impedance 48 1 volts true rms Amplifier clipping sets instantaneous peaks at 6dB abouve the continuous power or 1200 watts peak 96 1 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 returned 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
6. components in a durable unusually small enclosure resulting in a clear and articulate sound The enclosure is constructed of Road Wood a structural material made of layered and selectively oriented hardwood strands stongly bonded together with phenolic resins This high strength shell U S Patent 4 624 338 is covered with densely woven abuse resistant black carpeting The high frequency section of the ECS 15 3 utilizes a 90 x40 constant direcitvity horn driven by a one inch throat wide bandwidth titanium diaphragm driver This driver uses a unique convex drive Time Path phasing plug structure U S Patent 4 525 604 for smooth and extended high frequency performance The voice coil is coupled to the diaphragm with EV s exclusive Resonant Drive technology patent pending This increases and smooths the high frequency response and reduces the amount of internal equalization required for flat frequency response A _ self resetting high frequency protection circuit has been added to the ECS 15 3 to prevent against accdental overdrive and to improve system reliability If the input power to the high frequency driver exceeds the nominal rating the protection circuit is activated and reduces the power delivered to the driver by 6dB The system will remain in this mode of operation until the input power is reduced to a safe level SPL IN DB FIGURE 1 Axial Frequency Response The bass section of
7. ge levels exist from several seconds on up but we apply the long term average for several hours adding another extra measure of reliability Specifically the ECS 15 3 is designed to with stand the power test described in the revised D 94302 Straubing Electro Voice also maintains complete facilities for non warranty service Specifications subject to change without notice 1993 Mark IV Industries Inc Sa A SS TLE Sr MARK IV AUDIO AG Keltenstrasse 5 CH 2563 Ipsach Switzerland Phone 032 51 68 33 Fax 032 511221 eee a SS a MARK IV company
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