Electro-Voice Sb120 User's Manual
Contents
1. bracket Other Product Available for Enhancement of S 120 Performance Xp200 electronic system controller Hanging Inserts Three metric M6 x 14mm Dimensions see Figure 2 Height 58 7 cm 23 1 in Width 42 9 cm 16 9 in Depth 31 2 cm 12 3 in Net Weight 14 6 kg 32 2 Ib Shipping Weight 16 0 kg 35 3 Ib GENERAL DESCRIPTION The Electro Voice S 120 bass module is a compact low frequency enhancement system S120 300 Watt Nonpowered Bass Module e Lightweight and compact 32 Ib Very strong structural foam enclosure with integral handle and hanging points Stand mountable and arrayable e 300 W continuous power handling 1 200 watts short term for high output e DL12sb 12 inch woofer with Shallow cone deep frame geom etry for ultrahigh excursion of nearly one inch e Paralleled Neutrik Speakon high current connectors LASER ISSIR NOME II SS Se SESSA RED SCE aD OOO ae a designed for sound reinforcement Through the extensive use of computer aided design and modeling Electro Voice engineers have developed a state of the art portable system that combines the advantages of a long throw 12 inch woofer in a high impact polypropylene structural foam cabinet that is light in weight only 32 2 Ib overall LOW FREQUENCY DRIVER DESCRIPTION The DL12sb low frequency driver was specially developed for the S 120 Its shallow cone deep frame geometry provides a very high peak excursi2. Eleciro Voice SPECIFICATIONS Axial Frequency Response swept sine wave input 4 Volts at 10 Feet on axis anechoic environment normalized for 1 watt 1 meter see Figure 1 50 500 Hz Low Frequency 3 dB Down Point 50 Hz Usable Low Frequency Limit with Xp200 Controller 10 dB down point 43 Hz Half Space Reference Efficiency 3 7 Long Term Average Power Handling Capacity per EIA RS 426A see Power Handling Capacity section 300 watts Maximum Acoustic Output 11 1 watts Sensitivity SPL at 1 meter 1 watt input anechoic environment band limited pink noise signal 50 to 200 Hz 94 dB Dispersion Angle Included by 6 dB Down Points on Polar Responses Essentially omnidirectional Distortion 0 1 Full Power Output Second Harmonic 100 Hz 5 0 Third Harmonic 100 Hz 1 7 Distortion 0 01 Full Power Output Second Harmonic 100 Hz 1 7 Third Harmonic 100 Hz lt 0 01 Transducer Complement DL12sb 12 inch woofer Box Tuning Frequency 55 Hz Recommended Crossover Frequency 100 to 200 Hz 12 dB per octave minimum slope impedance Nominal 8 ohms Minimum 6 ohms Input Connectors Two paralleled Neutrik Speakon NL4MP connectors allows paralleling of multiple speakers Enclosure Materials and Colors Black polypropylene structural foam Supplied Accessory Input cable connector Neutrik Speakon NL4FC see S120 Connections section Optional Accessories 100BK mounting stand Mb200 mounting
3. OKLAHOMA CITY OK E GANANOQUE ONT Electro Voice Inc 1994 W Litho in U S A Part Number 532141 94u2 BEE RO RE ANARE
4. coupling occurs when the center to center distance between woofers is less than one half the wavelength Forthe S 120 crossed over at 137 Hz the frequency provided by the optional Xp200 electronic system controller the maximum distance for mutual coupling across the band is about 1 25 m 4 1 ft When the woofers are spaced greater than one half the wavelength the level increase is limited to the 3 dB input power increase The Sp120is connected using one of the Neutrik Speakon jacks marked input A parallel woofer can be connected using the other jack This halves the impedance the amplifier sees from 8 to 4 ohms Care must be taken not to abuse the amplifier by connecting impedances which are too low refer to amplifier specifica tions LOUDSPEAKER RESPONSE DUE TO THE ACOUSTICAL ENVIRONMENT Several factors must be considered when de termining the overall response of a speaker system in any listening environment Physical characteristics of the room itself and placement of the speakers and listener can have consider able affect on SPL capability perceived and or measured frequency response and stereo im aging The low frequency response of the S 120 can be adversely affected by poor placement The S 120 was designed for quarter or half space use This requires that the speaker system be positioned as close as possible to floor or wall surfaces half space or a floor wall junction quarter space Corner p
5. easing cone excursion below the box tuning frequency 55 Hz for the 120 Acoustic output is also decreasing rapidly Therefore it is sensible to protect the 120 and maximize its undistorted output by inserting an active high pass filter at a comer frequency somewhat below box tuning The roll off rate should be at least 12 dB per octave At this minimum rate a corner frequency of about 0 8 the box tuning frequency 47 Hz for the S 120 is appropriate For higher roll off rates lower corner frequencies are permissible and provide essentially equivalent protection The sub output of the optional Xp200 electronic system controller provides a 24 dB per octave roll off at 37 Hz 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 a random noise input signal is used because it contains many frequencies simultaneously just like the real voice or instrument program Sec ond our signal contains more energy at ex tremely high and low frequencies than the typical program adding an extra measure of reliability Third the test signal includes not only the overall long term average or con tinuous level which our ears interpretas loud ness but aiso 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 ins
6. kon NLF4C Four Pin Connector Pai wipes BD NLSFC PIN DIAGRAM 1 4 IN PHONE PLUG T jpo GROUND INDICATOR le the cabinet and the mating sockets that are molded into the top provide a means of stacking systems Three hanging inserts are also pro vided three metric M6 x 14 mm XP200 ELECTRONIC SYSTEM CONTROLLER The optional Xp200 electronic system control lercomplements the characteristics of the Sp120 Its mono summed subwoofer outputs provide crossover and infrasonic protection see Cross over and Subpassband Protection sections 24 db per octave filters roll off response below 37 Hz and above 134 Hz The Xp200 also includes a special low frequency profile circuit that enhances the performance of the S 120 The amount of enhancement can be adjusted to suit the user s personal preference CROSSOVER The S120 should be used in conjunction with an active crossover to roll off response above 100 200 Hz so that bass enhancement does not muddy up vocals or call attention to the physical location of the S 120 The closer the roll off point is to 100 Hz the least the overall sound quality will be affected by the enhance ment of the bass module The roll off rate should be a minimum of 12 dB per octave The optional Xp200 electronic controller pro vides a 24 dB per octave roll off above 134 Hz SUBPASSBAND SPEAKER PROTECTION The Sp 120 like all other vented systems experiences rapidly incr
7. l 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 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 re sulting from misuse or abuse of the product or e 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 and or Electro Voice West at 8234 Doe Avenue Visalia CA 93291 209 651 7777 or 800 825 1242 Inci dental and Consequential Damages Ex cluded Product
8. lacement in most cases will reinforce low frequencies the most Also placement in loose cavities or resonant mountings can seriously degrade the overall response ARCHITECTS AND ENGINEERS SPECIFICATIONS The loudspeaker system shall consist of a 12 inch long throw low frequency transducer mounted in a two piece vented enclosure made of black textured injection molded polypropy lene structural foam The system shall exhibit a 50 to 500 Hz fre quency response with a sensitivity of no less than 94 dB 1 watt 1 meter 50 to 200 Hz band limited pink noise It will be capable of handling 300 watts of power by the test described in the EIA Standard RS 426A There will be two par alleled NL4MP Neutrik Speakon connectors allowing paralleling of multiple speakers and three metric M6 x 14 mm hanging inserts ca pable of supporting the system in a permanent installation application The loudspeaker shall be have a black perfo rated metal grille covering the woofer Overall dimensions shall be 58 7 cm 23 1 in high 42 9 cm 16 9 in wide 31 2 cm 12 3 in deep The weight shall be 14 6 kg 32 2 Ib The loudspeaker system shall be the Electro Voice model S 120 ELECTRO VOICE UNIFORM LIMITED WARRANTY STATEMENT 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 below orin the individua
9. on ability of nearly one inch Atthe heart of this driver is a magnetic structure optimized to yield the best possible Thiele Smal param eters to match the tuned enclosure A specially modified magnet structure is used so that it is physically impossible for the voice coil to ever hit the back plate bottom out Also there is added clearance between the spider and the speaker frame so the spider cannot strike the frame another problem usu ally encountered in woofers used for long excursion applications The woofer features beryllium copper lead wires a low mass edge wound voice coil and high temperature materi als The part of the magnet 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 16 Ib magnet structure ENCLOSURE DESCRIPTION The enclosure is constructed of high impact polypropylene structural foam It provides a stiff and extremely durable enclosure Molded into the cabinet are an integral carrying handle and a stand socket for mounting on 1 e inch stands suchas the Electro Voice model 100BK Rubber feet that are attached to the bottom of FIGURE 1 S 120 Frequency Response 1 watt 1 meter anechoic environment 110 TTT TT T SA N FIGURE 2 Spi20 Dimensions 31 2 cm 12 3 In 429 em 16 9 in FIGURE 3 Two Conductor Cable Configurations for S4120 Speaker System Using Neutrik Spea
10. repair or replacement and return to the customer are the only remedies provided to the customer Electro Voice shall not be liabie 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 inci dental 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 not apply 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 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 cmarkivcompany 600 Cecil Street Buchanan Michigan 49107 MANUFACTURING PLANTS AT E BUCHANAN MI E NEWPORT TN SEVIERVILLE TN E
11. tantaneous peaks test mechanical reli ability cone and diaphragm excursion Note that the sine wave test signals sometimes used have a much less demanding peak value rela tive 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 Sp120 is designed to withstand the power test described in the 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 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 bandwidth analyzer s octave this shaping filter produces a spec trum 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 set at 300 watts into the 6 3 ohm EIA equivalent impedance 43 5 volts true rms Amplifier clipping sets instantaneous peaks at 6 dB above the continuous power or 1 200 watts peak 86 9 volts peak This proce dure provides a rigorous test of both thermal and mechanical failure models AMPLIFIER POWER RECOMMENDATIONS As noted in the Power Handling Capacity sec tion above the S 120 has a random noise power capaci
12. the high currents delivered by high wattage power amplifiers An NL4FC mat ing connector is supplied The NL4FC is a four pin connector and Figure 3 shows how the usual two conductor speaker cable should be wired to pins 1 and 1 of the connector Two typical connectors at the power amplifier end of the cable are shown banana and1 4 inch phone plugs The banana plug provides the more reliable connection Note also that Neutrik Speakon cables con nectors and wiring accessories are available from Pro Co Sound Inc and Whirlwind Music Distributors Inc To find your local Pro Co Whirlwind or Neutrik dealer contact Pro Co Sound Inc 135 E Kalamazoo Ave Kalamazoo M 49007 616 388 9675 Whirlwind Music Distributors Inc P O Box 1075 Rochester NY 14603 716 663 8820 Neutrik USA Inc 195 S3 Lehigh Ave Lakewood NJ 08701 908 901 9488 MULTIPLE USE The Sp120 may be used in multiples to increase acoustic output A 6 dB increase in maximum acoustic output occurs when two speaker sys tems are placed side by side and paralleled yielding a 4 ohm load For operation at very low frequencies the woofer cones mutually couple acting as one system with twice the effective cone area and power handling capac ity 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 acous tic output Mutual
13. ty of 300 watts long term 1 200 watts peak per EIA Standard RS 426A The following guidelines will help relate this number to an appropriate power amplifier output rating 1 To use the S 120 to full capacity skilled experts in sound system installation and operation will obtain the best results if the power amplifier is 2 0 to 4 0 times the long term average noise power rating of the speaker system 600 to 1 200 watts The caution cannot be made sirongly enough however that this arrangement is only for experts or for those who can discipline themselves against pushing the system for ever higher sound levels and who can avoid accidents such as cata strophic feedback or dropped microphones 2 A more conservative normal amplifier size which will produce audible results nearly equal to those of the expert recom mendation is 1 0 to 1 4 times the long term average noise power rating of the speaker For the Sp120 this is 300 to 420 watts 3 To be very conservative one can use an amplifier rated at 0 5 to 0 7 times the long term average noise power rating of the loudspeaker For the S 120 this is 150 to 210 watts Request P A Bible Addition No Two Power Handling Capacity for more background on these recommendations 120 CONNECTIONS The 120 is equipped with two paralieled Neutrik Speakon NL4MP connectors selected for their ability to reliably deliver to the speaker components
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