Electro-Voice PI94 User's Manual
Contents
1. HHT MLA E T N ME PVH N ima TTT pn rae The mid bass frequencies 160 to 1 600 Hz are reproduced by two EVI 25 4 cm 10 inch drivers The drivers are loaded by Electro Voice s proprietary aperiodic phase plug U S Patent No 4 718 517 for extended upper end response The phase plug makes use of the fact that at higher frequencies only the apex area of the cone near the voice coil is in motion and acoustic loading is automatically adjusted to maximize high frequency output The out puts of the two drivers are summed using Electro Voice s patented Manifold Technology U S Patent No 4 923 031 and fed directly into a 90 x 40 fiberglass horn The horn provides a uniform coverage pattern with ex ceptional control and natural sound A special feature of the horn is that it is structurally independent of the drivers This makes it very easy to re orient the horn to suit prevailing circumstances see Horn Rotation section The higher frequencies 1 600 20 000 Hz are reproduced by two DH2As1 16 compression drivers manifolded on the 22 U S Patent No 4 629 029 and mounted on a special modi fied HP94 90 x 40 constant directivity horn The HP series horn U S Patent No 4 685 532 features integral fiberglass and zinc construc tion which helps eliminate unwanted vibrations and allows the construction of beamwidth c2. Lower the horn back into cabinet Make sure the rear flange of the horn is seated correctly Repeat thisprocedure with the high frequency horn Special care must be taken to locate and seal the rear flange into the proprietary sealing gasket Replace all screws tighten down firmly but do not over tighten It is also possible to re orient the EV logo on the grille by removing the central screw rotating the logo and replacing the screw Replace the grille SERVICE Full details of these procedures can be found in the Service Data sheet available from the Ser vice Department in Buchanan Michigan ARCHITECTS AND ENGINEERS SPECIFICATIONS The loudspeaker system shall be a two way active mid bass high frequency system with two drivers manifolded in each frequency band for a total of four drivers The mid bass section shall have two 25 4 cm 10 inch drivers each having an 8 ohm 2 5 inch diameter voice coil constructed of edge wound rectangular alumi num wire and shall be capable of handling a 200 watt shaped pink noise signal with 6 dB crest factor for 8 hours as per ANSI EIA RS 426 A 1980 These two drivers shall each be loaded on a phase plug and manifolded onto a single 90 x 40 constant directivity type horn The high frequency section shall have two 3 3 cm 1 3 inch compression drivers each hav 1 For additional information contact Ancra international at 606 371 7272 or toll tree within the U S only at 8
3. 1 yearfrom the date of original purchase Additional details are included in the Uniform Limited Warranty statement Service and repair address for this product Electro Voice Inc 600 Cecil Street Buchanan Michigan 49107 616 695 6831 or 800 234 6831 Specifications subject to change without no tice ELECTRO VOICE 600 Cecil Street Buchanan Michigan 49107 MANUFACTURING PLANTS AT BUCHANAN E NEWPORT SEVIERVILLE TN OKLAHOMA CITY OK GANANOQUE ONT Electro Voice Inc 1994 Litho U S A Part Number 532611 9519
4. below orin 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 pre paid Exclusions and Limitations The Lim ited 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 malfunction resulting from use or operation of the product other than as specified in the product data sheet or owner s manual d malfunction re suiting from misuse or abuse of the product or malfunction occurring at any time after re pairs have been made to the product by anyone other than Electro Voice or any ofits authorized service representatives Obtaining Warranty Service To obtain warranty service a cus tomer must deliver the product prepaid to Electro 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 600 Cecil Street Buchanan MI 49107 616 695 6831 or 800 234 6831 Incidental and Consequential Damages Excluded Product repair or replacement and return to the cus tomer are the only remedies
5. 0 8 5 Directivity Index D 600 to 20 000 Hz Median see Figure 4 12 5 dB 1 2 dB 3 5 dB Distortion 120 dB SPL at 1 meter shaped spectrum see Figure 6 Second Harmonic 200 Hz 1 3 1 000 Hz 1 6 3 000 Hz 6 3 10 000 Hz 4 9 Third Harmonic 200 Hz 0 4 1 000 Hz 1 6 3 000 Hz 0 6 10 000 Hz 0 3 Transducer Complement Mid Bass Two 25 4 cm 10 inch mid bass drivers proprietary 90 x 40 mid bass fiberglass horn High Frequency Two DH2As1 16 3 3 cm 1 3 inch compression drivers HP94 variant 90 x 40 horn Recommended Crossover Frequencies 160 Hz 1 600 Hz 194 Manifold Technology Mid Bass High Frequency Permanent Installation System Rotatable mid bass and high frequency horns for easy orientation Integral suspension system for safe and easy installation High performance speech and music system for permanent installations Paintable to blend into any surroundings Input Connections Screw terminals 10 on barrier strip each driver can be individually accessed high frequency driver has blocking capacitor for protection Enclosure Materials and Color Multy layered Plywood with Black Textured Paint Grille Removable black nylon Hanging Integral four point flying system accepts Ancra 42546 10 single stud tie down cargo fitting four fittings supplied with system see Suspending PI94 Enclosure section Dimensions Height 91 4 cm 36 0 in Width
6. 57 2 cm 22 5 in Depth 75 9 cm 29 9 in Net Weight 77 1 kg 17016 Shipping Weight 86 2 kg 190 16 DESCRIPTION The Electro Voice P194 Manifold Technology mid bass high frequency loudspeaker system is designed for the permanent installation market The 94 is a two way active horn loaded system with two drivers manifolded to gether in each frequency band four drivers contained within the 94 5 compact dimensions The combination of PI94 mid bass high frequency loudspeaker system and the PI218L low frequency loudspeaker system forms a three way active loudspeaker system Opti mum performance of the 94 is obtained when used with the Dx34 digital sound system pro cessor PI94 SPECIFICATION GRAPHICS FIGURE 1 Typical Axial Frequency Response Using Recommended Crossover Equalization 1 watt 1 meter into mid bass section ee SS B SEY 4 7 Be KS RE 5 dB PER DIVISION VERTICAL FIGURE 3 Beamwidth vs Frequency BEAMWIDTH IN DEGREES 698 ERLE LTE LTE RESELL LEE LT SEA GEN CIEE FIGURE 4 Directivity Factor and Directivity index vs Frequency composite of both orientations DIRECTIVITY INDEX D dB FIGURE 5 Typical Axial Frequency Response Using Recommended Crossover Equalization Time Delay and PI 218L Low Frequency System TUN
7. AES2 1984 ANSI 54 26 1984 and the EIA Loudspeaker Power Rating Full Range ANSI EIA RS 426 A 1980 Both of these specifications use noise spectrums which mimic typical music and test the thermal and mechanical capabilities of the components Electro Voice will support relevant additional standards as and when they become availiable Extreme in house power tests which push the performance boundaries of the com ponents are also performed and passed to ensure years of trouble free service Specifically the P194 high frequency section passes AES2 1984 ANS I S4 26 1984 with the following values Zan 7 7 Ohms at 7 000 Hz 120 watts Test voltage 27 6 volts mms 55 2 volts peak 6 dB Selected decade 1 500 15 000 Hz The 94 mid bass section passes ANSI EIA RS 426 A 1980 with the following values Rsa 6 9 ohms 1 15 x 400 watts Test voltage 37 1 volts rms 74 1 volts peak 6 dB CROSSOVER EQ AND TIME DELAY The usable frequency ranges of the individual sections of the Pi94 are 150 2 000 Hz for the mid bass and 1 200 to 20 000 Hz for the high frequency band Minimum crossover slopes of 12 dB per octave are recommended Low frequency protection capacitors are included in the high frequency section with a 3 dB down point of 800 Hz The usable frequency response of the overall P194 mid bass high frequency loudspeaker system is 150 20 000 Hz For maximum perfor mance of the P194 in a
8. full range application the addition of the Electro Voice PI218L low frequency loudspeaker system is recom mended This combination forms the P194 full range high level sound reinforcement system The Electro Voice Dx34 Digital Sound System Processor has been pre programmed with pre sets for each member of the PI line Great care has been taken to optimize the directional re sponse through crossover and to ensure that cabinets with different coverage patterns will sound the same on axis as well as summing optimally off axis If the Electro Voice XEQ 3 electronic cross over equalizer delay unit is used the EQMT 2 plug in module will provide appropriate horn equalization Crossover frequencies of 160 Hz and 1600 Hz should be selected A 30 Hz high pass filter should be selected tor subpassband of the low frequency section CONNECTIONS Electrical connections are made on the back of the P194 via two terminal blocks The mid bass has two 8 ohm loudspeakers however the acoustic loading of the mid bass phase plugs and horn increases their electrical impedance to 16 ohms each The two loudspeakers are wired in parallel resulting in an 8 ohm load accessed by one terminal block The high frequency section has two 16 ohm drivers wired in parallel resulting in an 8 ohm load accessed by the remaining terminal block SUSPENDING PI94 ENCLOSURES Suspending any object is potentially dan gerous and should only be attempted by individ
9. provided to the customer Electro Voice shall not be liable for any incidental or consequential damages in cluding 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 Sys tems 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 notapply to burned voice coils or malfunctions such as cone and or coil damage resulting from improp erly designed enclosures Electro Voice active electronics associated with the speaker sys tems are guaranteed for three 3 years from the date of original purchase Additional details are included in the Uniform Limited Warranty statement Electro Voice Flying Hardware including en closure mounted hardware and rigging acces sories is guaranteed against malfunction due to defects in materials or workmanship for a period of one 1 year from the date of original purchase Additional details are included in the Uniform Limited Warranty statement Electro Voice Accessories are guaranteed against malfunction due to defects in materials or workmanship for a period of one
10. the mid bass section of the P194 is shown in Figure 5 DIRECTIVITY Figure 2 illustrates the polar response of the 194 The measurements were taken in large anechoic chamber at distance of 20 feet using pink noise at selected one third octave bands Crossover equalization and time delay were set as recommended in the Crossover EQ and Time Delay section Beamwidths are illustrated in Figure 3 and directivity factors R and directivity indexes in Figure 4 These figures show how smooth and controlled the 194 is over its entire operating range Data for Mark IV Audio s AcoustaCADD computer aided design program is available for the 94 DISTORTION Using the recommended crossover equaliza tion and time delay distortion for the PI94 was measured in the farfield with an input power that would result in a sound pressure level of 120 dB at one meter A frequency spectrum typical of contemporary close miked rock music was employed Plots of second and third order harmonic distortion are shown in Figure 6 POWER HANDLING TEST 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 contin ued use in arduous real life conditions Two main test specifications are used The AES Recommended Practice for Specification of Loudspeaker Components Used in Professional Audio and Sound Reinforcement
11. 00 233 5138 EY SSS ESSE oe ing a 16 ohm 2 0 inch diameter voice coil con structed of edge wound rectangular aluminum wire mounted on a 0 00125 inch thick titanium diaphragm and shall be capable of handling a 60 watt 1 500 to 15 000 Hz pink noise signal with a 6 dB crest factor for 2 hours as per AES2 1984 ANSI S4 26 1984 These twodriv ers shall be manifolded onto a single 90 x 40 constant directivity type horn The loudspeaker system shall produce a hori zontal beamwidth of 90 15 20 from 400 to 20 000 Hz and a vertical beamwidth of 40 20 5 from 900 to 20 000 Hz The loud speaker system shall have a uniform on axis frequency response from 160 to 20 000 Hz when used with the Electro Voice XEQ 3 elec tronic crossover with crossover frequency at 1 600 Hz The overall system shall have an efficiency of 16 25 The loudspeaker system shall have an sure constructed of multi layered plywood with black textured paint and shall have a black nylon grille The loudspeaker enclosure shall be trapezoidally shaped Dimensions shall be 91 4 cm 36 0 in high 57 2 cm 22 5 in wide and 76 2 cm 29 9 in deep Weight shall be 77 3 kg 170 Ib The loudspeaker system shall be the PI94 UNIFORM LIMITED WARRANTY Electro Voice products are guaranteed against malfunction due to defects in materials or work manship for a specified period as noted in the individual product line statement s
12. Elecio Voice SPECIFICATIONS Typical Axial Frequency Response swept one third octave pink noise anechoic environment 1 watt into mid bass mid band 2 83 V at 500 Hz measured in farfield and calculated to 1 meter on axis see Figure 1 150 20 000 Hz Long Term Average Power Handling Capacity per see Power Handling Test section Mid Bass ANSI EIA RS 426 A 400 watts High Frequency per AES2 1984 ANSI 54 26 1984 120 watts Short Term Power Handling Capacity 10 milliseconds Mid Bass per ANSI EIA RS 426 A 1 600 watts High Frequency per AES2 1984 ANSI 54 26 1984 480 watts Sensitivity SPL at 1 meter indicated input power into nominal impedance anechoic environment band limited pink noise signal Mid Bass High Frequency 1 Watt 1 Watt 104 08 110 dB 400 Watts 120 Watts 130 dB 130 dB 1 600 Watts 480 Watts 136 dB 136 dB impedance mid bass high frequency drivers wired in parallel Nominal mid bass high frequency 8 ohms 8 ohms Minimum mid bass high frequency 5 6 ohms 7 7 ohms Efficiency Mid Bass 16 High Frequency 25 Maximum Long Term Average Mid Band Acoustic Output 64 watts Beamwidth angle included by 6 dB down points on polar responses indicated one third octave bands of pink noise see Figure 3 400 20 000 Hz Horizontal 90 15 20 900 20 000 Hz Vertical 40 20 5 Directivity Factor R Q 600 to 20 000 Hz Median see Figure 4 17 9 3
13. on trol vanes special waveguides in the horn throat that correct for very high frequency dis persion anomalies The HP94 is also structur ally independent of its drivers allowing it to be easily removed and matched to the orientation of the mid bass horn see Horn Rotation sec tion The 94 uses multilayer plywood throughout the cabinet Electro Voice s unique four point flying system is installed as standard The cabinet is multi layered plywood with black textured paint A black nylon cloth grille is supplied as standard When an extended low end responseis needed the PI94 can be used with the PI218L low frequency loudspeaker system The P194 in its standard form is intended for use indoors Do not use outdoors APPLICATIONS The P194 is designed with the professional end user mind The 94 delivers versatile high level low distortion wide coverage perform ance The relative light weight and small vol ume of the P194 belies the performance obtain able with Manifold Technology The compact dimensions and trapezoidal shape allow the construction of very tight arrays It is possible and often beneficial to use the P194 as a stand alone device for example in pure speech reproduction However the 12181 low frequency loudspeaker system has been designed to complement the P194 and produce a fully integrated full range sound sys tem The cabinets are dimensionally identical and have matching hard
14. uals who have a thorough knowl edge of the techniques and regulations of rigging objects overhead It is the responsi bility of the installer to ensure the P194 is safely installed in accordance with appli cable regulations If the P194 is suspended Electro Voice strongly recommends that the system be inspected at least once a year If any sign of weakness or damage is de tected remedial action should be taken im mediately Every enclosure incorporates eight indepen dent suspension points four on the top and four on the bottom A minimum of four points must always be used to suspend the enclo sure The suspension points which tie the top and sides of the enclosure together are made of structural aluminum The suspension points mate to an 42546 10 locking fitting of which four are supplied with every enclosure Each of these suspension points has a break strength of 2 000 Ib in any direction This ap proach has been approved by an independent structural engineer A maximum of two enclo sures be daisy chained together allow ing the construction of vertical arrays If longer arrays are required provision must be made to independently suspend each enclosure HORN ROTATION Place PI94 on a flat surface with horns facing up Unscrew the four screws attaching the grille and pull the grille clear Remove all screws from around both horns mouths Lift the mid bass horn and rotate through 90
15. ware The 90 x 40 coverage pattern is independent of cabinet orientation The mid bass and high frequency horns are mounted from the front and are independent of their respective drivers see Horn Rotation section This means it is possible to use the P194 either horizontally or vertically without losing the desired coverage pattern es SSSR oe It is strongly recommended that when the 194 is operated by itself or with the P1218L a Dx34 digital sound system processor may be used This unit provides equalization crossover filters subpassband protection time delay and limiting functions Carefully selected settings for the PI94 PI218L are available in each Dx34 as a preset Alternatively an XEQ 3 electronic crossover equalizer time delay unit may be used EQMT EQ modules will provide appropriate equaliza tion Select 160 Hz and 1600 Hz crossover frequencies FREQUENCY RESPONSE The P194 frequency response shown in Figure 1 was measured on axis in the farfield in an anechoic environment using a swept one third octave input and calculated to a one meter equivalent distance by using the inverse square law The PI94 system was set up using the Dx34 digital sound system processor One watt of power 2 83 V at 500 Hz was delivered to the mid band of the mid bass section The fre quency response of the complete system the P194 and the PI218L together using the Dx34 with one watt 2 83 V at 500 Hz being delivered to
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