Electro-Voice S12-2A User's Manual
Contents
1. SPECIFICATIONS Usable Frequency Response 12 2A 75 Hz to 16 kHz 515 3 50 Hz to 16 kHz Sound Pressure Level 12 2A 4 ft at 100 watts input 115 dB 10 ft at 1 watt input 87 dB 515 3 4 ft at 100 watts input 116 dB 10 ft at 1 watt input 88 dB Long Term Average Power Handling Capacity 24 hours of clipped shaped random noise 100 watts Nominal Impedance 8 ohms Minimum Impedance 512 2 6 6 ohms 15 3 5 0 ohms Crossover Frequencies 812 2A 3000 Hz 515 3 600 Hz amp 4000 Hz Horizontal Beamwidth 512 2 2 kHz 61 4 kHz 65 Horizontal Beamwidth 515 3 2 kHz 120 4 kHz 98 Vertical Beamwidth 512 2 2 kHz 60 4 kHz 48 515 3 2 kHz 92 4 kHz 65 Connections Parallel 1 4 phone jacks Allows paralleling of multiple speakers Enclosure Material 3 4 plywood Finish Black vinyl with aluminum trim Dimensions 512 2 55 4 21 81 high 29 5 cm 11 63 in deep 47 3 cm 18 63 in wide 515 3 72 9 28 69 high 35 1 13 81 61 9 cm 24 38 wide Weight 512 2 21 8 kg 48 165 515 3 39 9 kg 88 Ibs Optional Accessories Mode 480 stand See POWER HANDLING TEST for input spectrum Eleciro Voice a gultan company Model 0122110192 91406 Speaker Systems DESCRIPTION The Electro Voice Model 12 2A two way stage system and the Electro Voice Model S15 3 three way stage system a2. Z FIGURE 3 15 3 Frequency Response Swept 1 3 Octave Band Pink Noise FIGURE 4 12 2A Polar Response Octave Bands of Pink Noise System Long Axis is Vertical 5 dB Per Division FIGURE 5 15 3 Polar Response Octave Bands of Pink Noise System Long Axis is Vertical 5 dB Per Division FIGURE 6 12 2A Beamwidth vs Frequency System Long Axis Vertical FIGURE 7 15 3 Beamwidth vs Frequency System Long Axis Vertical BEAMWIDTH IN DEGREES 6 dB vert HOR BEAMWIDTH IN DEGREES 6 dB VERT HOR 2 is He RS OQ iu ilu T A LENT E IHH L LE lli P eo LH 11 IST CT LL vost 11 i Ll 80 63 50 40 R ELSE EET Wg PUNE TE ET T A N S FE T T NS T LTT NTT sal IU 1T LTE ETT re SE aol LLU ET TT LT EUEN T 5 N PEB FREQUENCY RESPONSE Frequency response data was measured at 10 feet on axis with 4 volts of swept 1 3 octave random noise The frequency response curves for the 12 2A and S15 3 are shown in Figures 2 and 3 DISPERSION The polar frequency response curves for the 512 2 515 3 are given in Figures 4 and 5 For clarity only the 500 Hz 2 kHz and 8 kHz frequency plots are shown This data was taken using octave band centered pink noise with 4 volts applie
3. d to speakers and measurements were made with the speaker systems mounted in both the horizontal and vertical positions at 10 feet From this data the 6 dB down points were obtained and beamwidth versus frequency plots were made This information is shown in Figures 6 and 7 POWER HANDLING TEST 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 the test signal includes not only the overall long term average or continuous level which our ears interpret as loudness but also short duration peaks which are many times higher than the average just like 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 on up but we apply the long term average for several hours adding another extra measure of reliability The S12 2A and the S15 3 have be
4. en specifically tested for 24 hours as follows The output of a pink noise generator is fed to a shaping filter where the frequency spectrum is rolled off at 6 dB per octave beginning at 100 Hz and 10 000 Hz Pink noise is a particular type of random noise with equal power in every octave This shaped signal is sent to the power amplifier with the long term average power set at 100 watts into 8 ohms 28 3 volts true RMS Amplifier clipping sets instantaneous peaks at about 6 dB above the average or 400 watts 55 volts peak This procedure provides a rigorous test of both thermal and mechanical failure models HI FREQUENCY AUTO LIMITING An all solid state electronic device designed by Electro Voice engineers to meet the special demands of high level sound reinforcement The Hi Frequency Auto Limiter efficiently protects the tweeter from overloading by limiting tweeter power input to a predetermined safe level The result is virtual absolute driver protection without audible side effects or loss of sound pressure level This all solid state device responds instantaneously and is not dependent on slow moving mechanical parts Hi frequency auto limiting incorporates six solid state devices and a power resistor with appropriate heat sink MOUNTING SPEAKERS ON STAND The bottom end on the S12 2A and 515 3 contains two 1 4 20 TEENUTS to allow mountina the speakers on a stand The TEENUTS are spaced 3 inches apart to fit the EV M
5. ode 480 or the Atlas CS100 stands Overall height of the EV 480 stand is 58 inches and the Atlas CS100 stand is 46 inches WARRANTY Limited Electro Voice Music Loudspeaker Systems 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 malfunction 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 repair information and service locations please write Service Department Electro Voice Inc 600 Cecil Street Buchanan Michigan 49107 Phone 616 695 6831 or 8234 Doe Avenue Visalia CA 93277 209 625 1330 1 Electro Voice also maintains complete facilities for non warranty service of E V products Specifications subject to change without notice Part Number 530046 107 a Qulton ouan ELECTRO VOICE Inc 600 CECIL ST BUCHANAN MICH 49107 M M MANUFACTURING PLANTS AT E BUCHANAN MICH E NEWPORT TENN SEVIERVILLE TENN E GANANOQUE ONT B LITHO IN U S A
6. re accurate Compact speaker systems especially designed for applications where portability is important These two systems feature the ST350A tweeter with its wide dispersion and incorporate high frequency auto limiting as an electronic tweeter protection circuit The 512 2 is primarily designed to give top performance in a small package The 12 2A is capable of high SPL with 115 dB being generated at 4 feet with full power The S15 3 incorporates the EVM15L and the new Thiele vented midrange speaker This new vented cone midrange speaker is capable of producing sound pressure levels up to 116 dB at 4 ft while retainina the brilliance of a horn and the warmness of a cone speaker Construction of the S12 2A and S15 3 cabinets consists of black vinyl covered 3 4 plywood with protective extruding aluminum trim heavy duty rubber feet and recessed handles The rugged construction of these speaker systems makes them ideal for road use 55 4 cm 21 81 12 2A 47 3 cm 18 63 FIGURE 1 Dimensions S15 3 61 3 cm 24387 ul mir ssp mas ALLES TEP TTT FREQUENCY IM HERTZ FIGURE 2 12 2A Frequency Response Swept 1 3 Octave Band Pink Noise LAT d Hm AEDE SLT 3 ETE 8 5 828885 888883 FREQUENCY IN HERT
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