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Electro-Voice MTH-4.5/42B User's Manual

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1. SHOWN WITHOUT GRILL Rect Sina SPECIFICATIONS Frequency Response measured in far field calculated to one meter on axis swept sine wave one wait into mid bass section anechoic environment see Figure 1 150 20 000 Hz Recommended Crossover Frequencies 160 Hz 1 600 Hz 8 000 Hz Efficiency MB MF HF 14 25 25 Long Term Average Power Handling Capacity per EIA RS 426 A 1980 see Power Handling Section 1 200 120 120 Maximum Long Term Average Mid Band Acoustic Output 200 watts Sensitivity SPL at one meter indicated Input power anechoic environment band limited pink noise signal MB MF HF 1 1 14 Watt 109 116 5 112dB 1 200 120 120 Watts 140 137 5 133 dB Beamwidth angle included by 6 dB down points on polar responses indicated one third octave bands of pink noise see Figures 3 and 4 1 000 16 000 Hz Horizontal 40 40 4 1 000 16 000 Hz Vertical 20 420 5 Directivity Factor R Q 1 000 to 16 000 Hz Median see Figure 5 49 3 35 4 26 7 Directivity Index D 1 000 to 16 000 Hz Median see Figure 5 16 9 dB 2 4 dB 3 4 dB Distortion 120 dB SPL at 1 Meter Shaped Spectrum see Figure 6 Second Harmonic 200 Hz 0 9 1 000 Hz 0 8 3 000 Hz 1 4 10 000 Hz 1 3 Third Harmonic 200 Hz 0 9 1 000 Hz 0 5 3 000 Hz lt 0 1 10 000 Hz 0 6 Transducer Complement MB Four DL10X 10 inch drivers integrated 60 x 40 horn
2. allowing the differant models to be mixed as necessary throughout an array The rigging track accepts New Haven NH 32102 1 type double stud ring fittings Indi vidual rigging points have typical break strength ratings of 3 750 4 000 pounds which trans lates to working load ratings of 750 800 pounds for a 5 1 safety factor Consult the MT Flying Manual for specific structural strength ratings and limitations The enclosures may be ori ented with the rigging track on the sides of the enclosure or on the top and bottom and may be daisy chained together as long as the safety factor is 5 1 or greater and local regulations are met Electro Voice offers a line of flying hard ware accessories for use with the MT loud speaker systems CAUTION the MT loudspeaker systems should be suspended overhead only in ac cordance with the procedures and limita tions specified the MT Flying Manual and manual update notices FIELD SERVICE In the unlikely event that the MTH 4 5 42B should require service the mid bass drivers can be accessed by removing the back of the enclosure using a 2 Phillips screwdriver The mid bass drivers can be unbolted using a 5 32 inch hex key wrench and can be lifted away from the baffle board and slid out around the phase plugs There is a wiring diagram label for the mid bass section located on the back of the enclosure near the drivers The mid and or high frequency drivers can be accessed by remov
3. Two DH2AS1 compression drivers HPD42 40 x 20 horn HF Two DH2AS1 compression drivers HPD42 40 x 20 horn Impedance MB1 and 2 paralleled see Figures 2 and 7 Nominal MB MF HF 4 16 16 ohms Minimum MB MF HF 2 6 12 5 12 5 ohms Input Connections Neutrik Speakon NL8MPR Enclosure Materials Structural All Versions 14 ply birch plywood Finish MTH 4 5AC MTH 4 5ACF Black carpet 4 4 5 Black textured paint Hanging MTH 4 5ACF and MTH 4 5APF only Two point flying system tracks accept New Haven NH 32102 1 fittings Dimensions Height 91 4 cm 36 00 in Width 91 4 cm 36 00 in Depth 75 9 cm 29 88 in Net Weight 161 354 Ib Shipping Weight 182 kg 402 10 DESCRIPTION The Electro Voice MTH 4 5 42B mid bass mid frequency high frequency loudspeaker system LERNER RS MSNA Aa RR Se SG ES Manifold Technology Mid Bass Mid Frequency High Frequency Sound Reinforcement System e Sonically improved lower midrange 40 x 20 constant directivity pattern Larger MT rectangular enclosure High acoustic output low distortion Manifold Technology enables smaller and lighter loudspeaker arrays MT systems with different coverage patterns and output capabilities may be mixed and matched Unique rigging scheme for flexible array design and quick assembly e Available without rigging hardware e Available carpeted or painted is a member of t
4. anechoic environment with an input signal that would resultin a sound pressure level of 120 dB at one meter The Dx34 digital electronic unit was used to provide the necessary crossover filters equalization and signa delay A 24 dB per octave high pass crossover filter at 160 Hz was applied to the low end of the mid bass section A frequency spectrum typical of close miked rock music was employed The sound pressure level was normalized for an equiva lent one meter distance Plots of second and third harmonic distortion are shown referenced to the fundamental POWER HANDLING CAPACITY Electro Voice components and systems are manufactured to exacting standards to ensure reliability in continuous use in arduous real life conditions Besides utilizing industry standard power tests extreme in house power tests which push the performance boundaries of the loudspeakers are also performed for an extra measure of reliability The MT systems are rated per the EIA Loudspeaker Power Rating Full Range ANSI EIA RS 426 A 1980 which uses a shaped random noise signal to simulate typical music to test the mechanical and ther mal capabilities of the loudspeakers The Dx34 digital electronic unit was used to provide the necessary crossover filters and equalization during power testing Specifically the MTH 4 5 42B passes the RS 426 A 1980 power test with the following test parameters Mid bass Section MB1 amp MB2 paralleled Pea 1 2
5. cm 36 00 in high 91 4 cm 36 00 in wide and 75 9 cm 29 88 in deep and shall weigh 151 kg 354 Ib The loudspeaker system shall be the Electro Voice MTH 4 5 42B 4 5 42 MTH 4 5 42BC MTH 4 5 42BPF or MTH 4 5 42BP EY ELECTRO VOICE UNIFORM LIMITED WARRANTY tsi ee ka I E 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 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 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 repre
6. frequencies and automatically adjusts the acoustic loading to maximize acoustic output The output of the four drivers is summed through a mid bass manifold U S Patent No 4 923 021 and coupled to a 60 x 40 constant directivity horn 60 x 40 mid bass pattern is utilized to make a smooth transition to the mid frequency Because ofits small size the coverage pattern of the 40 x 20 mid frequency horn widens at SK Sea USE RSE EATS SE eR LE SEAS Se e a GPE GER ES US RPE AE EER Sak MTH 4 5 42B SPECIFICATION GRAPHICS FIGURE 1 Axial Frequency Response FIGURE 5 Directivity vs Frequency 120 30 MEEI HAL T E nT a x T PPT TT TT E E 2 mm 1 s OA oot LUAU TT PTET fT w m w 2008 109 1000 FREQUENCY HERTZ FREQUENCY IN HERTZ DIRECTIVITY INDEX D 5 FIGURE 6 Harmonic Distortion TTT ITU LLM CCCI CEU 08011111088 CH ATSC NTAL 5 T irii CCCI CCCI AW S BENNIE l EIA Ti TTT 5 2030 50 10 20 500 1000 2000 5000 10000 20000 FREQUENCY IN HERTZ 2nd HARMONIC __ 3rd HARMONIC on FIGURE 2 Impedance vs Frequency 120 110 100 IMPEDANCE OHMS SPL IN dB w kaal wa z FREQUENCY IN H
7. section has two 8 ohm drivers wired in series resulting in a single 16 ohm nominal load connected to Pins 3 3 The high frequency section also has two 8 ohm drivers wired in series for a single 8 ohm nominal load connected to Pins 4 4 A wiring diagram of the loudspeaker system is shown in Figure 7 The electrical impedance versus fre quency is shown in Figure 2 FLYING THE MT SYSTEMS A manual entitled the MT Flying Manual is available from Electro Voice and is included with each flying MT loudspeaker system A brief introductory overview is included here The MT Flying Manual should be consulted for com plete structural specifications and detailed in formation on safely suspending and using the MT systems The MTH 4 5 42BCF carpeted and the MTH 4 5 42BPF painted are versions of the MTH 4 5 42B loudspeaker system that include flying hardware The MT systems incorporate a unique two point flying system that permits a wide range of vertical angle adjustment and offers maximum flexibility in array design and implementation for both touring sound and per manent installations The quick release air craft L track type hardware design allows ar rays of loudspeakers to be assembled and disassembled very quickly and offers such flexibility in the vertical angling of cabinets that pull up points are usually unnecessary Fur thermore all of the flying MT 4 and MT 2 loud speaker models include the same rigging hard ware
8. significantly smaller and lighter than would be obtainable with conventional loudspeaker systems The MTH 4 5 42B may be combined with other members of the MT 4 and MT 2 loudspeaker family providing the array designer a variety of coverage angles acoustic output and sure sizes from which to choose For full range applications the MTH 4 5 42B may be com bined with any of the MTL 4B or MTL 2B low frequency sound reinforcement systems The MTL 4B is a low frequency system with a rect angular enclosure that is dimensionally identi cal to the MTH 4 5 42B For optimal acoustic performance of the MT loudspeaker systems the Electro Voice Dx34 digital electronic cross over equalization signal delay limiter unitis rec ommended Careful attention was paid to details to provide both the touring company and sound contractor a convenient and time saving sound reinforce ment package The MTH 4 5 42B dimensions were chosen for efficient truck pack and high density array design The systems may be stacked three high and three wide in a standard truck box enabling 14 000 watts of sound sys tem to be accommodated in only three feet of truck floor length The two point rigging system offers flexible array design and efficient assem bly To facilitate service a variety of screws washers and hex key wrenches are provided with each loudspeaker system In addition there are wiring diagram labelsin convenientlocations inside the en
9. utilizes Linkwitz Riley 24 dB per octave crossover filters at 160 1 600 and 8 000 Hz Each output section has equalization specifi cally matched to the loudspeaker system and signal delay setto achieve zero lobing error and time alignment between frequency bands addition the output levels of each frequency band are set so that with the output level controls set in the zero dB position the loud speaker system will have a flat frequency re sponse in an anechoic environment when used with amplifiers having identical gain ELECTRICAL CONNECTION AND SYSTEM WIRING Electrical connections to the MTH 4 5 42B are made on the back of the enclosure via an 8 pin connector There are two connectors on the input panel te allow paralleling of other MTH 4 5 42B systems The Neutrik Speakon NL8MPR is used for both connections One mating Neutrik Speakon NL8FC cable end connector is supplied with each loudspeaker system The pin assignments are as follows Pin 1 MB1 Pin 1 1 Pin 2 2 2 MB2 Pin 3 MF Pin 3 Pin4 HF 4 The mid bass section has four 8 ohm drivers however the acoustic loading of the phase plugs and horn increases their electrical imped ance to a nominal 16 ohms each These four drivers are wired in paralleled pairs resulting in two nominal 8 ohm loads with one pair con nected to Pins 1 1 and the other pair to Pins 2 2 The mid frequency
10. 00 watts Test Voltages 45 5 volts rms 91 0 volts peak 1 15 x R 1 73 ohms Mid Frequency Section 120 watts Test Voltages 36 4 volts rms 72 8 volts peak Rsa 1 15 x R 11 0 ohms High Frequency Section 120 watts Test Voltages 36 4 volts rms 72 8 volts peak Req 1 15 xR 11 0 ohms CROSSOVER EQ AND SIGNAL DELAY The usable frequency ranges of the individual MTH 4 5 42B sections are 150 2 000 Hz for the mid bass section 1 200 20 000 Hz for the mid frequency section and 6 000 20 000 for the high frequency section Crossover frequencies of 160 1 600 and 8 000 Hz with 24 dB per octave slopes are recommended Forfull range applications the MTL 4B low frequency loud speaker system is recommended for use with the MTH 4 5 42B For optimal acoustic perfor mance the Electro Voice Dx34 digital elec tronic crossover equalization signal delay unit is recommended The Dx34 is a programmable two in four out digital electronic unit which may be configured for stereo two way mono three way plus sub woofer or mono four way operation Each out put section Includes crossover filters equaliza tion limiting signal delay polarity and gain adjustment the parameters of which all may be programmed and stored by the user In the mono four way configuration the Dx34 includes a factory preset for optimal performance of the MT 4 5 42B loudspeaker system the MTH 4 5 42B and MTL 4B systems combined that
11. ERTZ 70 FIGURE 3 Polar Response FIGURE 7 Wiring Diagram 2 1 40 YELLOW YELLOW HF 16 OHMS NOM 16 OHMS NOM 5 dB PER HORIZONTAL DIVISION VERTICAL FIGURE 4 Beamwidth vs Frequency SS m PI 100 z 7 rig Paeet R o LL TT TT ET BLUE HORIZONTAL WL 14 RED RED We VERTICAL bss n 2 w m M na m 1200 to FREQUENCY IN HERTZ MB1 8 OHMS NOM Long horn axis vertical 1 g BLACK BLACK gestae RPE A ER ATR lower frequencies approaching 60 x 40 at the mid bass mid frequency crossover point The MTH 4 5 42B mid frequency section con tains two DH2AS1 compression drivers manifoided onto a 40 x 20 constant directivity horn The 2 51 1 375 inch bolt on version of the DH2A features a powerful motor struc ture and titanium diaphragm for maximum lin ear acoustic output extended high frequency response and accurate transient response The two drivers are coupled to an HPD42 dual throat constant directivity TransPlanar horn The dual throat design maintains the vertical horn height required for vertical pattern control while minimizing the horn length The MTH 4 5 42B high frequency section is identical to the mid frequency section contain ing two DH2AS1 compressi
12. closure FREQUENCY RESPONSE The MTH 4 5 42B frequency response shown in Figure 1 was measured on axis in the far field ananechoic environment using a swept sine wave signal The Dx34 digital electronic unit was used to provide the necessary crossover filters equalization and signal delay No high pass crossover filters were applied to the low end of the mid bass section One watt of power 2 00 volts rms at 500 Hz was applied to the mid band of the mid bass section The sound pressure level was normalized for an equiva lent one meter distance DIRECTIVITY The directional response of the MTH 4 5 42B was measured in an anechoic environmentata distance of 6 1 meters 20 feet using 1 3 filtered pink noise A full spherical measurement system was used The Dx34 digital electronic unit was used to provide the necessary crossover filters equalization and signal delay The polar response of the loud speaker system at selected 1 3 octave fre quencies is shown in Figure 3 The frequencies selected are fully representative of the polar response of the system The beamwidth of the system utilizing the complete 1 3 octave polar data is shown in Figure 4 The directivity factor Q R and directivity index D are shown in Figure 5 Complete AcoustaCADD data is available for the MTH 4 5 42B loudspeaker system DISTORTION Distortion forthe MTH 4 5 42B shown in Figure 6 was measured on axis in the far field in an
13. 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 period of one 1 year 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 Bucha nan Michigan 49107 616 695 6831 or 800 234 6831 Specifications subject to change without notice aMARKIVcompany 600 Cecil Street Buchanan Michigan 49107 MANUFACTURING PLANTS BUCHANAN NEWPORT TN SEVIERVILLE TN OKLAHOMA OK GANANOQUE ONT Electro Voice Inc 1996 Litho in U S A Part Number 533172 9609
14. h cone drivers each individually coupled to a mid bass phase plug then collectively manifolded and coupled to a 60 x 40 constant directivity horn have a total inputimpedance of 4 ohms and have a power rating of 1 200 watts as per ANSI EIA RS 426 A 1980 The mid frequency section shall operate from 1 200 20 000 Hz with a sensitivity of 116 5 dB for one watt at one meter and consist of two compres sion drivers coupled to a dual throat 40 x 20 constant directivity horn have a total input im pedance of 16 ohms and have a power rating of 120 watts as per ANSI EIA RS 426 A 1980 The high frequency section shall operate from 1 200 20 000 Hz with a sensitivity of 112 dB for one watt at one meter and consist of two compression drivers coupled to a dual throat 40 x 20 constant directivity horn have a total input impedance of 16 ohms and have a power rating of 120 watts as per ANSI EIA RS 426 A 1980 The overall system shall have a uniform on axis frequency response from 150 20 000 Hz and shall have a nominal horizontal beamwidth of 40 and a nominal vertical beamwidth of 20 The loudspeaker system shall have an enclosure constructed from 0 75 Inch thick 14 ply birch plywood be finished with a black carpet or a black textured paint have a black nylon grille and have a two point rigging system that will accept New Haven NH 32102 1 type double stud ring fittings if appli cable The loudspeaker enclosure shall be 91 4
15. he family of Manifold Technology MT loudspeaker systems designed for high level sound reinforcement In concert sound touring and permanent installation ap plications The MTH 4 5 42Bis an active three way horn loaded 40 x 20 constant directivity system with a rectangular enclosure utilizing four high power mid bass drivers in the mid bass frequency band two high power com pression drivers in the mid frequency band and two high power compression drivers in the high frequency band This configuration results in exceptionally high acoustic output from a small enclosure The MTH 4 5 42B may be combined with other members of the MT 4 and MT 2 loud speaker family The combination of the MTH 4 5 42B loudspeaker system and the MTL 4B low frequency loudspeaker system form the MT 4 42B full range system There are four models in the MTH 4 5 42B series the MTH 4 5 42BCF carpeted finish with flying hardware the MTH 4 5 42BC carpeted finish without flying hardware the MTH 4 5 42BPF painted finish with flying hardware and the MTH 4 5 42BP painted finish without flying hardware The MTH 4 5 42B mid bass section utilizes four high efficiency low distortion DL10X 10 inch mid bass drivers coupled to a unique phase plug U S Patent No 4 718 517 An Aperiodic Enhancer this phase plug extends the up per end response by making use of the fact that only the apex area of the cone near the voice coil is in motion at the higher
16. ing the grille using a 2 Phillips screw driver and removing the MF HF horn baffle using a 5 32 inch hex key wrench The mid and high frequency drivers can be unbolted from the horns manifold using a 5 32 inch hex key wrench There is a wiring diagram label for the mid and high frequency section located on the horn baffle assembly near the drivers Asa further service convenience ahardware kit that includes a 5 32 inch hex key and an assort ment of spare screws and washers is included with every MTH 4 5 42B loudspeaker system Failure of the 10 inch mid bass driver will re quire the entire driver to be returned to an authorized Electro Voice service center for re pair A mid or high frequency driver failure can be repaired in the field by replacing the dia phragm assembly or if desired the entire driver can be returned to an authorized service center for repair The following service parts are available from the Service Departmentin Bucha nan Michigan MTH 4 5 42B Service Data Sheet 532483 HF 81161 XX 8 ohm DH2A Diaphragm Kit 832 2499 DH2AS1 Driver MF 81161 XX 8 ohm DH2A Diaphragm Kit 832 2499 DH2AS1 Diiver MB 810 1491 DL10X Driver ARCHITECTS AND ENGINEERS SPECIFICATIONS The loudspeaker system shall be a three way active mid bass mid frequency high frequency system The mid bass section shall operate from 159 2 000 Hz with a sensitivity of 109 dB for one watt at one meter and consist of four 10 inc
17. on drivers coupled to an HPD42 dual throat 40 x 20 constant directivity hom The use of the same horn and driver in the mid and high frequency sections ensures identical coverage patterns and mini mizes path length differences between the two frequency bands All versions ofthe MTH 4 5 42B are constructed of 0 75 inch thick 14 ply birch plywood and are extremely well braced to survive the rigors of the road The MTH 4 5 42BCF flying and MTH 4 5 42B nonflying systems are covered with black Ozite Super TNT carpeting the most rugged in the industry For permanent installa tion applications the MTH 4 5 42BPF flying and MTH 4 5 42B nonflying systems are available with a black textured paint finish The MTH 4 5 42BCF carpeted and MTH 4 5 42BPF painted systems incorporate a two point flying system All models feature a black nylon cloth grille The RD 1 removable dolly is available for use with the carpeted MTH 4 5 42BCF and MTH 4 5 42BC versions for portable applications APPLICATIONS The MTH 4 5 42B is ideal for any professional concert sound or permanent installation appli cation requiring high sound pressure levels with low distortion from a compact enclosure The Manifold Technology design maximizes the acoustic output per enclosure frontal area acoustic output per enclosure bulk volume and acoustic output per enclosure weight of the loudspeaker system This enables loudspeaker arrays to be constructed that are
18. sentatives 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 Ceci Street Buchanan MI 49107 616 695 6831 or 800 234 6831 Incidental and Consequential Damages Excluded Product repair or fy sega and return to the cus tomer 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 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 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 for three 3 years

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