Electro-Voice S-122 User's Manual
Contents
1. or dead zones at certain frequencies The 90 x 40 dispersion characteristic also helps avoid early reflec tions from nearby floor or side wall 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 ENCLOSURE CONSTRUCTION The S 122 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 hard wood 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 adhesives and proper bracing 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 Large heavy duty metal corner protectors firmly secured rubber feet recessed handles and a protective metal grille complete the picture and ensure that the S 122 speaker system is ideally suited to a long and reliable2. included in the Uniform Limited Warranty statement Service and repair address for this product Electro Voice Inc 600 Cecil Street Buchanan Michigan 49107 Specifications subject to change without notice SCHEMATIC DIAGRAM
3. 00 watt peak 69 2 volts peak This procedure provides a rigorous test of both thermal and mechanical failure modes STAND MOUNTING The S 122 can be mounted on the 100BK speaker stand or any other stand with a 1 s inch diameter shaft WARRANTY Limited Electro Voice products are guaranteed against malfunction due to defects in materials or workmanship for a specified period as noted in the individual product line statement s below or in the individual product data sheet or owner s manual beginning with the date of original purchase If such malfunction occurs during the specified period the product will be repaired or replaced at our option without charge The product will be returned to the customer prepaid Exclusions and Limitations The Limited Warranty does not apply to a exterior finish or appearance b certain specific items described in the individual product line statement s below or in the individual product data sheet or owner s manual c malfunction resulting from use or operation of the product other than as specified in the product data sheet or owner s manual d malfunction resulting from misuse or abuse of the product or a malfunction occurring at any time after repairs have bean made to the product by anyone other than Electro Voice or any of its authorized service representatives Obtaining Warranty Service To obtain warranty service a customer must deliver the product prepaid to Elect
4. SPECIFICATIONS Frequency Response Measured At 10 Feet on Axis Swept Octave Half Space Anechoic Environment see Figure 1 Curve shown has been normalized for 1 Watt 1 Meter 70 20 000 Hz Low Frequency 3 dB Down Point 70 Hz Usable Low Frequency Limit 10 dB down point 55 Hz Half Space Reference Efficiency 3 9 Long Term Average Power Handling Capacity per EIA Standard RS 426A see Power Handling Capacity section 200 waits Maximum Woofer Acoustic Output 7 8 watts Sound Pressure Level at 1 Meter 1 Watt Input Anechoic Environment Band Limited Pink Noise Signal 300 2 000 Hz 99 dB Dispersion Angle Included by 6 dB Down Points on Polar Responses Indicated One Third Octave Bands of Pink Noise 250 20 000 Hz Horizontal see Figure 4 110 60 5 000 20 000 Hz Vertical see Figure 4 DIEZ Directivity Factor R Q 800 16 000 Hz Median see Figure 5 11 5 5 5 8 Directivity Index D 800 16 000 Hz Median see Figure 4 10 5 dB 1 5 dB 5 dB Distortion 0 1 Full Power Input Second Harmonic 100 Hz 3 1 000 Hz 4 10 000 Hz 10 Third Harmonic 100 Hz lt 1 1 000 Hz lt 1 10 000 Hz 5 Distortion 0 01 Full Power Input Second Harmonic 100 Hz 1 1 000 Hz 2 10 000 Hz 4 Third Harmonic 100 Hz lt 1 1 000 Hz lt 1 10 000 Hz 1 Transducer Complement High Frequency DH 2010A HT94 constant directivity horn Low Frequency EVG 12 Box Tuning Frequency 62 Hz Crossover Frequ
5. e Path phasing plug structure U S Patent 44 525 604 for smooth and extended high frequency performance The bass section of the S 122 is designed using Thiele Small parameters for efficient performance to below 70 Hz The new EVG 12 12 inch woofer used is a specially designed unit featuring an extended length voice coil and high temperature construction materials 0 f4 YOLOVA ALIAILOSHIO HORIZONTAL VERTICAL Directivity vs Frequency Whole Space anechoic NUMBERS INDICATE SPECIFIC Re VALUES FIGURE 4 1 ke 8 2 gt gpl O XSQNI ALIALLO3BIQ o e a Y eo er im o A FIGURE 2 a octave pink noise 4 volts 10 feet FIGURE 3 Beamwidth vs Frequency Whole Space anechoic HORIZONTAL O VERTICAL ap 9 S334930 NI HLOIMWVIE om 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 approximately 90 circular coverage patterns for each to create a special system type the constant directivity system At higher frequencies the horizontal coverage pattern remains constant and the vertical pattern smoothly transitions to a 40 to 50 angle above 5 000 Hz Response within the 90 x 40 rated coverage angle is uniform which means dependable audience coverage without hot spots
6. ency 1 600 Hz Crossover Slope 12 dB per octave Impedance Nominal 8 ohms Minimum 6 5 ohms Input Connections Parallel s inch phone jacks allows paralleling of multiple speakers Enclosure Materials and Colors Black carpet covered Road Wood Dimensions 62 8 cm 24 7 in high 46 2 cm 18 2 in wide 30 5 cm 12 0 in deep Net Weight 21 8 kg 48 Ibs ElectroVoice a MARK IV compony Axial Frequency Response Volts 10 Feet S 122 Two Way Stage Speaker System Shipping Weight 24 5 kg 54 lbs Optional Accessories 100BK speaker stand DESCRIPTION The Elsctro Voice S 122 is a 200 watt two way high efficiency constant directivity stage system featuring a vented direct radiating woofer saction It combines professional quality components arranged in a vertical array with an unusually durable enclosure The result is wide range accurate sound reproduction with transparent highs and extended bass response The enclosure is constructed of Road Wood a structural material made of layered and selectively oriented hardwood strands strongly bonded together with phenolic resins This high strength shell is covered with densely woven abuse resistant black carpeting U S Patent 44 624 338 The high frequency section of the S 122 utilizes a 90 x 40 constant directivity horn driven by a one inch throat wide bandwidth titanium diaphragm driver This driver uses a unique convex drive Tim
7. life on the road FREQUENCY RESPONSE The combination of a 12 inch woofer wide bandwidth high frequency driver and an equalized crossover results in the wide and smooth overall response shown in Figure 1 Curves are shown for normal box tuning This response was measured at 10 feet using a swept octave input of 4 volts no external equalization was used DIRECTIVITY A unique feature of the S 122 is the constant directivity dispersion provided by the 90 x 40 horn The polar response of the system at selected 3 octave bandwidths is shown in Figure 2 These polar responses were measured in an anechoic environment at 10 feet using 3 octave pink noise inputs The frequencies selected are fully representative of the polar response of the system Beamwidth of the system utilizing the complete a octave polar data is shown in Figure 3 R Q and directivity index D are plotted in Figure 4 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 the test signal includes not only the overall long term average or continuou
8. ro Voice or any of its authorized service representatives together with proof of purchase of the product in the form of a bill of sale or receipted invoice A list of authorized service representatives is available from Electro Voice at 800 Cecil Street Buchanan MI 49107 616 695 6831 and or Electro Voice West at 8234 Doe Avenue Visalia CA 93291 209 651 7777 Incidental and Consequential Damages Excluded Product repair or replacement and return to the customer are the only remedies provided to the customer Electro Voice shall not be liable for any incidental or consequential damages including without limitation injury to persons or property or loss of use Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you Other Rights This warranty gives you specific legal rights and you may also have other rights which vary from state to state Electro Voice Speakers and Speaker Systems are guaranteed against malfunction due to defects in materials or workmanship for a period of five 5 years from the date of original purchase The Limited Warranty does not apply to burned voice coils or malfunc tions such as cone and or coil damage resulting from improperly designed encio sures Electro Voice active electronics associated with the speaker systems are guaranteed for three 3 years from the date of original purchase Additional details are
9. s 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 some times 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 Specifically the S 122 is designed to withstand the power test described in EIA Standard RS 426A The EIA 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 band width 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 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 above 1 200 Hz This shaped signal is sent to the power amplifier with the continu ous power set at 200 watts into the 8 0 ohms EIA equivalent impedance 34 6 volts true RMS Amplifier clipping sets instantaneous peaks at 6 dB above the continous power or 8
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