Electro-Voice Force Sub User's Manual
Contents
1. a cus tomer must deliver the product prepaid to Electro Voice Service or any of its autho rized 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 avail able from Electro Voice Service at 600 Cecil Street Buchanan MI 49107 800 234 6831 or FAX 616 695 4743 Consequential Damages Excluded Prod uct repair or replacement and return to the Incidental and customer are the only remedies provided to the customer Electro Voice shall not be li able for any incidental or consequential dam ages including without limitation injury to persons or property or loss of use Some states do not allow the exclusion or limita tion 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 nghts 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 origi nal purchase The Limited Warranty does not apply to burned voice coils or malfunctions such as cone and or coil damage resulting from improperly designed enclosures Elec tro Voice active electronics associated with the speaker systems are guaranteed for three 3 years from the date of original p2. 30 inch pole mount for use with the Force full range system Safety concerns limit the use of a pole greater than 30 inches in length but under no circum stances should the total height of all com ponents exceed 80 inches Force Sub will handle a long term average power input of 300 watts RMS and real world peaks of over 600 watts The input connections are M inch phone but may also be ordered with Neutrik NL4MP connectors Force Sub E which are recommended for sustained high power operation Power handling To our knowledge Electro Voice was the first U S manufacturer to develop and pub lish a power test closely related to real life conditions First we use a random noise in put signal because it contains many frequen cies simultaneously just like real voice or instrument program Second our signal con tains more energy at extremely high and low frequencies than typical actual program add ing 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 pro Figure 1 Frequency Response 1 watt at 1 meter anechoic environment SPL is 3dB higher for half space 7120 115 A 2 105 e ELLI ULLAS AA A LLLE LLAMA PL LELAI LALLI LLLA LALLI LILA LALLI G i am
3. low E is approx 41 2Hz These very low frequencies are not only potentially damaging to the woofers they also waste massive amounts of ampli fier power and cause needless distortion of the upper frequencies 535721 As seen in the response curve fig 1 the frequency response of the Force Sub is not flat nor was it intended to be The require ments of a subwoofer for live performance are radically different from those of a typi cal living room Most popular music is in herently bass heavy with most of that en ergy concentrated in the kick drum thump region between 60 and 80Hz Force Sub has been designed for maximum ourput ef ficiency in exactly that range The use of two specially designed 15 inch woofers re sults in 36 more cone area thana single 18 inch and the dual slot load enclosure design is derived from technology developed for the Electro Voice X Array touring systems It should be noted that the frequency response graph fig 1 was measured in an anechoic whole space environment From a practi cal standpoint this is a sort of worst case measurement of low frequency capability In actual use sitting on the floor the long bass wavelengths will be reinforced by the floor and the room boundaries and will re sult in more low bass output than the graph implies depending on the room and the Force Sub s position in it The Force Sub includes a top mounted stand adapter and a
4. 9107 616 695 6831 616 695 1304 Fax Telex Communications Inec 1999 Litho in U S A Part Number 535758 9945
5. EleClOVOICC masa Force Sub High output dual 15 inch slot loaded woofer system designed to complement the FORCE stage system integral passive crossover filter combined with unique acoustic design allows for parallel opera tion with full range systems for added bass response e 300 watts continuous power handling capability Top mounted 1 3 8 inch stand adapter 30 inch pole included for elevat ing EV FORCE full range system Durable industrial grade carpet covering Description The Electro Voice Force Sub is an 8 ohm dual 15 inch subwoofer system designed to reproduce high impact bass program mate rial from a small compact easily portable enclosure The Force Sub is intended for use with the Electro Voice Force full range stage system and incorporates a built in low pass filter to allow parallel operation of both systems from a single amplifier channel When connected in parallel the combined Conventional biamplified operation is also possible using impedance is 4 ohms an active electronic crossover of 12 18 or 24 dB per octave and a crossover frequency between 80 and 125Hz No internal wiring change is required for biamp operation be cause the built in first order low pass filter is only effective above 125Hz In either mode of operation an active low frequency protection filter is strongly recommended to reduce unwanted program content below 40Hz Bass guitar open
6. nic crossover the Electro Voice Q66 is an ideal choice for powering up to four Force Subs WARNING Under NO Circumstances should ANY amplifier be used in Bridge Mode Bridging an ampli fier results in abnormally high peak voltage levels that can destroy your speakers Limited Warranty Electro Voice products are guaranteed against malfunction due to defects in mate rials or workmanship for a specified period as noted in the individual product line statement s below or in the individual prod uct data sheet or owner s manual beginning with the date of original purchase If such malfunction occurs during the specified pe riod 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 fin ish or appearance b certain specific items described in the individual product line statement s below or in the individual prod uct data sheet or owner s manual c mal function 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 e malfunction occurring at any time after repairs have been made to the product by anyone other than Electro Voice Service or any of its authorized ser vice representatives Obtaining Warranty Service To obtain warranty service
7. nnel full 20 20 000 Hz bandwidth at 8 ohms For passive operation Force Sub and Force full range connected in parallel the power capacity of the full range system must be taken into consideration Remember that the Force full range has a lower power handling capacity than the Force Sub so above the Force Sub s 125 Hz low pass filter fre quency all of the amplifier power is directed to the full range system Only below 125 Hz is the power shared between the two sys tems with the Force Sub getting the ma jority only on the very lowest notes There fore for passive operation select an ampli fier whose continuous amp ohm rating full 20 20 000 Hz bandwidth is appropriately sized to the full range system a nice size for the Force is approximately 200 ro 300 watts Force Sub RMS 8 ohms continuous power per chan nel and whose 4 ohm rating per channel is near the total for both systems This class of amplifier especially if it also incorporates good on board limiters provides plenty of power where vou need it down in the bass region where both systems are drawing power in short duration pulses but not so much as to seriously endanger the more deli cate high frequency components An am plifier that matches this description very well is the Electro Voice Q44 which is ideally suited to powering a Force or a passively crossed parallel connected Force and Force Sub system in stereo Using an ac tive electro
8. p amp amp x wa 2 23 TE Figure 2 Line Drawing aee NS 92104 Force Sub gram The long term average level stresses the speaker thermally heat The instanta neous 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 Specifically the Force Sub is designed to withstand the power test described in the ANSI EIA RS 426 A 1980 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 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 Amplifier Recommendations The power handling capacity of the Force Sub is 300 watts EIA 350 watts AES For biamp operation choose an amplifier of ap proximately 300 watts RMS per cha
9. urchase Additional details are included in the Uni form Limited Warranty statement For warranty repair service information or a listing of the repair facilities nearest you contact the service repair department at 616 695 6831 or 800 685 2606 For technical assistance contact Technical Support at 800 234 6831 or 616 695 6831 M F 8 00 a m to 5 00 p m Eastern Stan dard time Specifications subject to change without notice Force Sub Force Sub Figure 3a Force with Force Sub Specifications Frequency Response 47 125 Hz Long Term Average Power Handling EIA RS 426A 300 watts AES 1984 350 watts P 4 K Sound Pressure Level 1w 1m 97 dB full space anechoic 100 dB half space i mamaaaammaaaaaamaamamangana ej 78 37 Ey 4 940 WAN 4 GHOT THEM Crossover Acoustic first order electrical Impedance Nominal 8 ohms Minimum 6 8 ohms When used with Force full range in parallel Nominal 4 ohms Minimum 3 8 ohms Input connectors 1 4 inch phone input 14 inch phone output to Force full range Neutrik NL4MP input output on E versions Enclosure material construction Black carpeted MDF Dimensions overall Height 24 3 in 61 7 cm Width 20 3 in 51 6 cm Depth 23 8 in 60 5 cm Net Weight 89 5 Ib 40 6 kg Shipping Weight 97 5 lb 44 3 kg SPEAKER Subwooter ElechoVoice 600 Cecil Street Buchanan MI 4
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