Electro-Voice FM-12C User's Manual
Contents
1. FM 12C Floor Monitor Speaker System e Coaxial speaker with Super Dome tweeter 35 45 and 50 system orientations 200 watt long term power handling PRO circuit high frequency protection SPECIFICATIONS Frequency Response 10 Feet on Axis Swept One Third Octave Half Space Anechoic Environment see Figure 1 curve shown normalized for 1 watt 1 meter 100 18 000 Hz Low Frequency 3 dB Down Point 100 Hz Usable Low Frequency Limit 10 dB down point 80 Hz Half Space Reference Efficiency 2 8 Long Term Average Power Handling Capacity per EIA Standard RS 426A see Power Handling Capacity section 200 watts 800 watts short term j Maximum Woofer Acoustic Output 5 7 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 see Figure 3 250 20 000 Hz Horizontal 110 70 5 000 20 000 Hz Vertical 60 30 Directivity Factor R Q 800 16 000 Hz Median see Figure 4 12 4 29 2 10 9 Directivity Index 800 16 000 Hz Median see Figure 4 9 8 dB 6 4 dB 8 3 dB Distortion 0 1 Full Power Input Second Harmonic 100 Hz 5 0 1 000 Hz lt 1 10 000 Hz lt 1 Third Harmonic 100 Hz 1 0 1 000 Hz 5 0 10 000 Hz 1 0 Distortion 0 01 Full Power Input Second Harmonic 1002. 8 x 1 2 inch screws The grille assembly can be quickly and easily removed by using a Phillips screwdriver allow ing access to the drivers orto rotate the grille so the orientation of the Electro Voice logo can be changed ARCHITECTS AND ENGINEERS SPECIFICATIONS The voice and music speaker system shall con sist of a 12 inch coaxial speaker combination in a one piece molded black textured polyethyl ene enclosure It shall exhibit a 300 to 2 000 Hz frequency response with sensitivity of no less than 99 dB 1 W 1 m 300 to 2 000 Hz band limited pink noise It will be capable of handling 200 watts of power by testing de scribed in the revised EIA Standard RS 426A and produce vertical and horizontal beamwidths 6 dB down including angle of 100 deviating no more than 60 from this angle over the frequency range of 1 000 to 10 000 Hz The speaker system shall be 41 4 cm 16 3in high 45 7 cm 18 0 in wide 39 1 cm 15 4 in deep and weigh no more than 13 4 kg 29 5 Ib The loudspeaker system shall be the Electro Voice FM 12C WARRANTY Limited 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 or in the individual product data sheet or owners manual beginning with the date of original purchase If such malfunction occurs during the specified period the product will be repaired or
3. 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 of its 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 Inc 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 customer are the only remedies 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 n
4. Hz lt 1 1 000 Hz lt 1 10 000 Hz 1 0 Third Harmonic 100 Hz lt 1 1 000 Hz 3 0 10 000 Hz lt 1 Transducer Complement 12 inch low frequency driver EVM FORCE hybrid with a 2 2 inch flat wire voice 12 inch Super Dome high frequency driver coupled to 5 inch Direktor Crossover Frequency 1 200 Hz Crossover Slope 12 dB per octave Impedance Nominal 8 ohms Minimum 7 7 ohms Input Connectors Two 7 phone jacks wired in parallel allows paralleling of multiple speakers Enclosure Materials and Colors Sealed one piece molded black textured polyethylene enclosure Dimensions Height 41 4 cm 16 3 in Width 45 7 cm 18 0 in Depth 39 1 cm 15 4 in Net Weight 13 4 kg 29 5 Ib Shipping Weight 15 5 kg 34 0 Ib DESCRIPTION The compact Electro Voice FM 12C is a 200 watt two way medium to high efficiency constant directivity stage vocal monitor Possi ble system orientations are at 35 45 and 50 to the floor Its unique coaxial design provides wide range response and exceptionally small size The enclosure is one piece molded black tex tured polyethylene utilizing a special molding technique This technique yields a wall thick ness similar to wood cabinets a rigid structure that is virtually indestructible and a finish that is impervious to nearly all chemicals The small size 1 25 cubic feet light weight 29 5 Ib and convenient molded in handle
5. ITE SIETNIE SEEI EIER RR MR DRM MPa D dB 18 000 Hz This combination is mounted coaxially on a specially designed die cast frame 12 inch low frequency driver The bass section of the FM 12C is a derivative of the EVM and FORCE loudspeaker fami lies It features a low mass edge wound 2 2 inch diameter voice coil with beryllium copper lead wires coated with proprietary high temperature materials The polyimide voice coil former and the pole piece of the motor structure are vented for increased cooling ca pabilities under high power input conditions The voice coil is driven by a nine pound mag netic structure mounted to a rigid yet light weight eight spoke die cast aluminum frame for further heat sinking THE PRO CIRCUIT A self resetting high frequency protection cir cuit is incorporated into the FM 12C crossover network to prevent against accidental over drive and improve system reliability If the input power to the high frequency section exceeds the nominal rating the protection circuit is acti vated reducing the power delivered to the driver by 6 dB The system will remain in this mode of operation until the input power is reduced to a safe level FREQUENCY RESPONSE The combination of a 12 inch low frequency driver wide bandwidth Super Dome high frequency driver plus Direktor and an equal ized crossover results in the wide and smooth overall response shown in Figure 1 This re sponse was meas
6. at the cabinet s center of gravity make it ideal to carry or set up The high frequency section of the FM 12C utilizes a beamwidth stabilizing Direktor coupled to EV s exclusive high power capacity wide beamwidth Super Dome high frequency driver for the range 1 200 to Hine 500 1000 2006 FREQUENCY IN HERTZ FIGURE 2 Polar Response s octave pink noise 4 voits 10 feet T SEE ur ss M HORIZONTAL VERTICAL FIGURE 3 Beamwidth vs Frequency Whole Space anechoic rx 3 35 OOO CC RC X HHO SBE A el EEL LT Su kq 0 80 TH He 60 LI 0 j I jJ L ili ST ot 6 dB BEAMWIDTH IN DEGREES 20 30 50 100 200 FREQUENCY Hz FIGURE 4 Directivity vs Frequency Whole Space anechoic DIRECTIVITY FACTOR R Q FREQUENCY HERTZ TTE LA ov mua eee f ee ee D 9 99 4 71 T G Le 20 30 50 100 200 500 1000 2000 000 f 1 KAJ I TRS T 9 CoCo HORIZONTAL VERTICAL amp 500 1000 2000 5000 10000 20000 4 DIRECTIVITY INDEX E alse A A ANN DN I e rettet tette n tetra ONS
7. eaker thermally heat The instantaneous peaks test mechanical reliability cone and diaphragm excursion Note that the sine wave test signals sometimes used have much less demanding peak value related 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 FM 12C is designed to with stand the power test described in the revised EIA Standard RS 426A The EIA test spectrum is applied for eight hours To obtain the spec trum 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 meas ured with the usual constant percentage band width 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 a continuous power set at 200 watts into 6 0 ohms EIA equivalent impedance 34 7 volts true rms Amplifier clipping sets peaks at 6 dB above the continuous power or 800 watts peak 78 0 volts peak This procedure provides a rigorous test of both thermal and mechanical failure modes GRILLE REMOVAL The grille assembly of the FM 12C is fastened to the enclosure using four
8. equency Crossover Slope Impedance Nominal Minimum Dimensions hwd Net Weight Shipping Weight SERVICE DATA FM 12C 1002 1543 100 18 000 Hz 100 Hz 80 Hz 200 watts 800 watts short term 99 dB 1 200 Hz 12 dB per octave 8 ohms 7 7 ohms 41 4 cm x 45 7 cm x 39 1 16 3 in x 18 0 in x 15 4 in 11 1 kg 24 5 Ib 13 2 kg 29 0 Ib SECTION ORIENTATION OF INSULATION BACK VIEW ORIENTATION OF INPUT PANEL 100 20W POL CH 1 0 MH RAYCHEM RDEOSOA TO RED IN TERMINAL TO BLACK IN TERMINAL SCHEMATIC LABEL SERIAL No 10 70986 9 63145 4 8 82178 4 SCR 8 18 x 1 1 2 OVAL HD XREC BLK EN 5 63087 4 SCR 10 x 1 1 2 FLAT HD XREC BLK 12 TEM PART NO GTY DESCRIPTION gt N N to N
9. ot 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 Volce 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 a MARK IV company 600 Cecil Street Buchanan Michigan 49107 Phone 616 695 6831 FAX 616 695 3104 Specifications Model amp Spec Frequency Response Low Frequency 3 dB Down Point Usable Low Frequency Limit 10 dB down point Long term Average Power Handling Capacity per EIA Standard RS 426A SPL at 1 W 1 m Input Anechoic Environment Band Limited Pink Noise Signal 300 to 2 000 Hz Crossover Fr
10. ured at 10 feet using a 4 volt input in an anechoic chamber The response is one third octave averaged No external equal ization was used DIRECTIVITY A unique feature of the FM 12C is the constant directivity dispersion provided by the Direktor The polar response of the system at selected one third octave bandwidths is shown in Figure 2 These polar responses were measured in an anechoic environment at 10 feet using one third octave pink noise inputs The frequen cies selected are fully representative of the polar response of the system Beamwidth of the system utilizing the complete one thirg octave polar data is shown in Figure 3 R Q and directivity index 0 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 be cause it contains many frequencies simultane ously 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 contin uous level which our ears interpret as loud ness but also short duration peaks which are many times higher than the average just like actual program The long term average level stresses the sp
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