Electro-Voice EVM-12L User's Manual
Contents
1. Eleclro oice SPECIFICATIONS Usable Frequency Response in a Typical Vented 1 3 Cubic Foot Enclosure 1 watt 1 meter see Figure 1 80 5 000 Hz Sound Pressure Level 1 watt 1 meter 100 dB Long Term Average Power Handling Capacity per EIA RS 426 A 1980 see Power Handling section 300 watts Nominal Impedance 8 ohms Voice Coil Diameter 63 5 mm 2 5 in Thiele Small Driver Parameters f free air resonance frequency 55Hz Q electromagnetic Q at f 0 245 Q mechanical Q at f 4 37 Q total Q at f oe 5 0 232 V volume of air having same acoustic compliance as driver suspension 82 9 liters 2 9 ft 7 half space reference efficiency 4 3 V peak displacement volume of diaphragm S x X_ 0 165 liters 0 0059 ft S effective diaphragm area 0 050 m 78 in X ax peak linear displacement of diaphragm 3 3 mm 0 13 in Mounting Information see Installation section Mounting Hole Diameter eight evenly spaced holes 7 1 mm 0 28 in etter L drill Bolt Circle Diameter 294 mm 11 56 in Baffle Opening Diameter front or rear mounting 279 mm 11 0 in Optional Mounting Accessory SMH 1 mounting hardware kit Dimensions see Figure 2 Overall Diameter 310 mm 12 20 in Overall Depth 138 mm 5 5 in Net Weight 8 6 kg 19 Ib Shipping Weight 10 0 kg 21 5 Ib DESCRIPTION The EVM 12L is a 12 inch speaker designed for professional high level high2. quality guitar amplification systems Used full range the EVM 12L s frequency response is specifically tailored for brilliant lead guitar performance and classic guitar tones The EVM 12L incorpo rates manufacturing refinements that have im proved performance Power capacity is 300 watts per EIA RS 426 A 1980 The Power Handling section describes these ratings in detail This improvement in the EVM 12L s al ready highly regarded reliability has been made without changing its other performance character istics in any way The construction of the EVM 12L features a low mass edgewound voice coil on a rugged laminated polyimide coil form driven by our large 16 Ib magnetic structure Also featured EVM 12L 12 Inch Classic Lead Guitar Loudspeaker e Classic lead guitar performance full precise overdriven tones and unrivaled clean tones e Ideal upgrade speaker e 300 watts long term power capacity Edge wound flat aluminum wire for maximum output and bullet proof reliability e 100 dB sensitivity are a heavy duty curvilinear cone and a faligue resistant cone suspension Both the coil and magnetic structure are vented All of this is packaged arounda robust eight spoke diecast aluminum frame The EVM 12L may be front or rear mounted withoutan adapter The optional SMH 1 speaker mounting kit facilitates front mounting see In stallation section RECOMMENDED ENCLOSURES Typical Enclosures The EVM 1
3. 2L will often be used to replace inferior speakers in existing enclosures Me chanical and electrical characteristics are such that the superior efficiency sound quality and reliability of the EVM 12L will be realized in virtually any sealed vented bass reflex or open backed enclosure Open backed enclosures have been used for electric guitars from the very beginning Gener ally they offer very good performance in many situations The sound is often characterized as being open and havinga full midbass response Although these enclosures are often referred to as warm sounding they do not have an espe cially tight or solid low end response The EVM 12L s performance in this type of enclo sure is considered world class for many music styles Sealed enclosures are also very commonly used for guitar for some very good reasons Like open backed enclosures sealed enclo sures are very easy to design and build The EVM 12L performs very well in virtually any possible sealed enclosure from 0 9 to 3 0 ft internal volume The enclosure size makes very little difference within this range EVM 12L performance in sealed enclosures is tight and punchy The low end is fast and solid The overall performance is very focused EVM 12L SPECIFICATION GRAPHICS FIGURE 1 EVM 12L Frequency Response in Typical Enclosure FIGURE 5 Fillister and Internal Hex Drive Screws for Front 1 3 ft 1 Watt 1 Meter Mounting not to scale PTT T
4. LEE LLLI 1 soot UT TTT Lee TTT T p COR T Co Con ne LIC 110 SPL in dB LEUTE LLLI LL LLLNIL y LEVEL TET LE HELME E w w FREQUENCY IN HERTZ FILLISTER HEAD INTERNAL HEX DRIVE SCREW MACHINE SCREW FIGURE 2 EVM 2L Dimensions 138 mm 5 5 in FIGURE6 Connection of Two EVM 12L Speakers in Parallel net Impedance Is 4 ohms FIGURE 3 Front Mounting Detail not to scale FIGURE7 Connection of Two EVM 12L Speakers in Series net impedance is 16 ohms FIGURE4 Rear Mounting Detail not to scale FIGURE 8 Connection of Four EVM 12L Speakers in Series T NUT Parallel net impedance is 8 ohms i OM SPEAKER FRAME NE Vented Enclosures The most extended and contoured low fre quency performance with the least amount of distortion is typically realized in properly de signed vented enclosures In such designs the vent or port actually reproduces the lowest octave or so of bass response The vent is driven to full acoustic output by a relatively small motion of the speaker cone itself acting through the air contained within the enclosure The excursion of the EVM 12L at these fre quencies is much reduced compared to sealed or open backed enclosures directly reducing harmonic distortion Details on vented box design construction and equalization may be obtained from Electro Voice by requesting TL806 Builders Plans Form 1544 523 I
5. NSTALLATION The EVM 12L may be front or rear mounted although front mounting is preferred because of convenience For simple front mounting the convenient SMH 1 mounting accessory is rec ommended Complete mounting instructions for standard front mounting are given below It is important that recommended baffle openings and mounting hole locations be followed Front Mounting Front mounting requires a 279 mm 11 0 in diameter cutout and a 294 mm 11 56 in bolt circle Mark the baffle opening and screw loca tions on the blank panel first Drill the screw holes before cutting the large baffle opening f 1 4 20 screws are used four screws are sufficient for secure mounting of the speaker T nuts are recommended for simple secure mounting If T nuts are used the holes should be 7 1 mm 0 281 in diameter letter L drill Apply glue to the flanges of 1 4 20 long shank T nuts before driving into the rear of the holes Sealing of the front mounted speakeris accom plished with the adhesive backed foam gasket segments that are included with your new EVM 12L Strip off the protective paper and apply the gasketto the rear mounting surface of the speaker rim making certain that the holes in the gasket line up with the mounting holes in the speaker frame Length of the 4 20 screws should be 1 2 inch plus the panel thickness when using T nuts The screws must be fillister head or internal hex drive machine screws to seat dow
6. duct repair or replace ment 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 limi tation injury to persons or property or loss of use Some states do not allow the exclusion or limitation of incidental or consequential dam ages 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 associeted 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
7. n in the re cess of the speaker frame gasket see Figure 3 Screws should be tightened evenly and securely Maximum torque possible with a proper size screwdriver should be sufficient IMPORTANT When front mounting the screw head must fit down into the front gasket cutout see Figure 3 Rear Mounting Rear mounting requires the same diameter cutout and screw circle as front mounting Other comments regarding the use of T nuts apply to rear mounting as well Screw length should be 3 4 inch plus panel thickness if using T nuts ionger for standard hex nuts If hex nuts are used a second nut should be tightened against the first nut to prevent loosening during operation A lock washer and flat washer are recommended be tween the screw head and frame see Figure 4 Screws should be tightened evenly but not excessively Maximum torque possible with a proper size screwdriver should be sufficient Do not use adhesive back gasket segments for rear mounting Normal fasteners up to 6 mm 1 4 in will fit through the eight holes in the frame Front mounting is simplest using the optional SMH 1 speaker mounting kit Custom Enclosures If a cabinet is to be constructed from scratch 3 4 inch solid and jointed or marine plywood is recommended After construction be certain interior is completely free of metal filings wood chips etc Electrical Connections Use no 18 or larger stranded wire to connect the loudspeaker to the in
8. put panel connector POWER HANDLING In musical instrument systems unlike sound reinforcement systems it is advisable to use speakers that are rated for at least as much power as your amplifier output rating It is also widely known that heavily overdriven tube am plifiers are usually capable of double their rated output power and sometimes more In this situation the user would be wise to use speak ers having a combined rating of two times the amplifier output The new EVM 12L has a long term rms power rating of 300 watts This as sures that the speaker has more than enough thermal headroom to be confidently used with virtually any guitar amplifier currently available To our knowledge Electro Voice was the first U S manufacturer to develop and publish a power test closely related to real life conditions Specifically the EVM 12L is designed to with stand the power test described in EIA RS 426 A 1980 The EIA test spectrum is applied for eight hours This shaped signal is sent to a power amplifier with the continuous power set at 300 watts into the 6 ohms EIA equivalent impedance 42 5 volts true rms Amplifier clip ping sets instantaneous peaks at 6 dB above the continuous power or 1 200 watts peak 85 0 volts peak This procedure provides a rigorous test of both thermal and mechanical failure modes UNIFORM LIMITED WARRANTY Electro Voice products are guaranteed against malfunction due to defects in materials or wo
9. rk manship for a specified period as noted in the individual product line statement s 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 Limited Warranty does not apply to a exterior finish or appearance b certain specific items described in the individual product line statement s be low 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 e malfunction occurring at any time after repairs 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 customer 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 Pro
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