Meyer Sound 750-LFC Operating Instructions Manual Download Page 4

750-LFC OPERATING INSTRUCTIONS

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English 

• To reduce the risk of electric shock, disconnect the appara

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tus from the AC mains before installing audio cable. Recon

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nect the power cord only after making all signal 
connections. 

• Connect the apparatus to a two-pole, three-wire grounding 

mains receptacle. The receptacle must be connected to a 
fuse or circuit breaker. Connection to any other type of 
receptacle poses a shock hazard and may violate local elec

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trical codes. 

• Do not install the apparatus in wet or humid locations with

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out using weather protection equipment from Meyer Sound. 

• Do not allow water or any foreign object to get inside the 

apparatus. Do not put objects containing liquid on or near 
the unit.

• To reduce the risk of overheating the apparatus, avoid 

exposing it to direct sunlight. Do not install the unit near 
heat-emitting appliances, such as a room heater or stove. 

• If equipped with an external fuse holder, the replaceable 

fuse is the only item that can be serviced by the user. When 
replacing the fuse, only use the same type and value.

• This apparatus contains potentially hazardous voltages. Do 

not attempt to disassemble the unit. The only user-service

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able part is the fuse. All other repairs should be performed 
only by factory-trained service personnel.

Deutsch

• Zur Minimierung der Gefahr eines elektrischen Schlages 

trennen Sie das Produkt vor dem Anschluss von Audio-und/
oder Steuerleitungen vom Stromnetz. Das Netzkabel darf 
erst nach Herstellung aller Signalverbindungen wieder 
eingesteckt werden.

• Das Produkt an eine vorschriftsgemäss installierte 

dreipolige Netzsteckdose (Phase, Neutralleiter, Schutzleiter) 
anschließen. Die Steckdose muss vorschriftsgemäß mit 
einer Sicherung oder einem Leitungsschutzschalter abgesi

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chert sein. Das Anschließen des Produkts an eine anders 
ausgeführte Stromversorgung kann gegen Vorschriften ver

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stossen und zu Stromunfällen führen.

• Das Produkt nicht an einem Ort aufstellen, an dem es direk

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ter Wassereinwirkung oder übermäßig hoher Luft

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feuchtigkeit ausgesetzt werden könnte, solange es sich 
nicht um ein Produkt handelt, dass mit der Meyer Sound 
Weather Protection Option ausgestattet ist.

• Vermeiden Sie das Eindringen von Wasser oder Fremd

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körpern in das Innere des Produkts. Stellen Sie keine 
Objekte, die Flüssigkeit enthalten, auf oder neben dem Pro

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dukt ab.

• Um ein Überhitzen des Produkts zu verhindern, halten Sie 

das Gerät von direkter Sonneneinstrahlung fern und stellen 
Sie es nicht in der Nähe von wärmeabstrahlenden Geräten 
(z.B. Heizgerät oder Herd) auf.

• Bei Ausstattung mit einem externen Sicherungshalter ist die 

austauschbare Sicherung das einzige Gerät, das vom Benu

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tzer gewartet werden kann. Verwenden Sie beim Austausch 
der Sicherung nur den gleichen Typ und Wert.

• Dieses Gerät enthält möglicherweise gefährliche Spannun

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gen. Versuchen Sie nicht, das Gerät zu zerlegen. Der einzige 
vom Benutzer zu wartende Teil ist die Sicherung. Alle 
anderen Reparaturen dürfen nur von im Werk geschultem 
Servicepersonal ausgeführt werden.

Français

• Pour éviter tout risque d’électrocution, débranchez 

l’enceinte de la prise secteur avant de mettre en place le 
câble audio.Ne rebranchez le cordon secteur qu’après avoir 
procédé à toutes les connexions de signal audio

• Brancher l'appareil sur une prise secteur à trois fils et deux 

pôles avec mise à la terre. La prise doit être reliée à un fus

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ible ou à un disjoncteur. Le branchement à tout autre type 
de prise présente un risque de choc électrique et peut 
enfreindre les codes locaux de l'électricité. 

• N’installez pas l’enceinte dans des endroits humides ou en 

présence d’eau sans utiliser d’équipements de protection 
adéquats fournis par Meyer Sound.

• Ne laissez pas d’eau ou d’objet étranger, quel qu’il soit, 

pénétrer à l’intérieur de l’enceinte. Ne posez pas d’objet 
contenant du liquide sur ou à proximité de l’enceinte. 

• Pour réduire les risques de surchauffe, évitez d’exposer 

directement l’enceinte aux rayons du soleil. Ne l’installez 
pas à proximité de sources de chaleur, radiateur ou four par 
exemple.

• S'il est équipé d'un porte-fusible externe, le fusible rem

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plaçable est le seul élément qui peut être réparé par l'utilisa

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teur. Lors du remplacement du fusible, n'utilisez que le 
même type et la même valeur.

• Cet appareil contient des tensions potentiellement dangere

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uses. N'essayez pas de démonter l'appareil.Le fusible est la 
seule pièce réparable par l'utilisateur. Toutes les autres 
réparations doivent être effectuées uniquement par du per

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sonnel de maintenance formé en usine.

Español

• Para reducir el riesgo de descarga eléctrica, desconecte el 

aparato de la red eléctrica antes de instalar el cable de 
audio. Vuelva a conectar el cable de alimentación sólo 
después de realizar todas las conexiones de señal.

• Conecte el aparato a una toma de corriente de tres hilos y 

dos polos con conexión a tierra. El receptáculo debe estar 
conectado a un fusible o disyuntor. La conexión a cualquier 
otro tipo de receptáculo representa un riesgo de descarga 
eléctrica y puede violar los códigos eléctricos locales.

Summary of Contents for 750-LFC

Page 1: ...Keep these important operating instructions Check www meyersound com for updates OPERATING INSTRUCTIONS LINE ARRAY 750 LFC Compact Low Frequency Control Element...

Page 2: ...ic mechanical recording or otherwise without prior written permission from Meyer Sound The following is a partial list of Meyer Sound trademarks and service marks 650 P 650 R2 Acheron AlignALink B Noi...

Page 3: ...the replaceable fuse is the only user serviceable item When replacing the fuse only use the same type and the same value 15 Refer all other servicing to qualified service personnel Servicing is requi...

Page 4: ...ekter Sonneneinstrahlung fern und stellen Sie es nicht in der N he von w rmeabstrahlenden Ger ten z B Heizger t oder Herd auf Bei Ausstattung mit einem externen Sicherungshalter ist die austauschbare...

Page 5: ...onerlo a la luz solar directa No instale la unidad cerca de aparatos que emitan calor como un calefactor o una estufa Si est equipado con un portafusibles externo el fusible reemplazable es el nico el...

Page 6: ...750 LFC OPERATING INSTRUCTIONS vi...

Page 7: ...20 TruPower Limiting 20 Amplifier Cooling System 21 On Status LED 21 Chapter 4 QuickFly Rigging 23 Important Safety Considerations 23 750 LFC Rigging Options 23 Groundstacking 750 LFC Loudspeakers Wit...

Page 8: ...NG INSTRUCTIONS viii Appendix A Rain Hoods 41 750 LFC Rigid Rain Hood 41 750 LFC Collapsible Rain Hood 41 Appendix B 750 LFC Specifications 43 750 LFC without Rigging Dimensions 45 750 LFC with Riggin...

Page 9: ...me sonic linearity as Meyer Sound s 900 LFC low frequency control element in a smaller lighter cabinet making it ideal for building scalable systems to suit portable applications or fixed installation...

Page 10: ...the MUB LINA Figure 3 or MYA LINA yoke In addition the pole mount can be used to pair the 750 LFC with the ULTRA X40 and other UltraSeries loudspeakers NATIVE MODE LINA and 750 LFC loudspeakers are o...

Page 11: ...d Figure 6 yield good results For ULTRA X40 applications the ratio shown in Figure 7 yields good results CAUTION Make sure that all cables for looped loudspeakers are wired correctly Pin 1 to Pin 1 Pi...

Page 12: ...dspeakers are not coplanar or those requiring delay offsets to align subsystems or to create directional low frequency control These systems require additional processing NOTE For Native mode to work...

Page 13: ...produce noise or hum or cause serious damage to the input and output stages of the system s electronic components 120 V AC 3 Phase Wye System Single Line Line Neutral Earth Ground Figure 8 illustrate...

Page 14: ...A Consider the total current draw for all loudspeakers on the circuit including the first loudspeaker see Table 1 AC Loop Output Gray The gray AC Loop Output connector allows multiple 750 LFC loudspea...

Page 15: ...speaker s amplifier to cycle on and off or cause damage to the power supply 750 LFC CURRENT REQUIREMENTS Current draw for loudspeakers is dynamic and fluctuates as operating levels change Because diff...

Page 16: ...h voltage transients up to several kilovolts Filters common mode and differential mode radio frequencies EMI Sustains operation temporarily during low voltage periods Powering on the 750 LFC Loudspeak...

Page 17: ...all liquids away from 750 LFC loudspeakers to avoid hazards from electrical shock Use the cable rings see Cable Rings on page 20 on the rear of the 750 LFC cabinet to reduce strain on the AC power ca...

Page 18: ...750 LFC OPERATING INSTRUCTIONS 18...

Page 19: ...eature when placing an order AUDIO CONNECTORS The 750 LFC is available with XLR 3 pin Figure 12 or 5 pin Figure 13 connectors for audio Input and audio Loop output XLR 5 pin connectors accommodate bot...

Page 20: ...culate the load impedance for the looped loudspeakers divide 10 k the input impedance for a single loudspeaker by the number of looped loudspeakers For example the load impedance for ten 750 LFC louds...

Page 21: ...STEM The 750 LFC loudspeaker employs natural convection in its cooling system The amplifier s heat sink provides natural convection cooling from the air flowing near its fins When exposed to high ambi...

Page 22: ...750 LFC OPERATING INSTRUCTIONS 22...

Page 23: ...ets at a 5 1 safety factor and BGV C1 with some angle restrictions additional load ratings are possible use MAPP to verify load ratings supports mixed arrays of LINA and 750 LFC loudspeakers without t...

Page 24: ...speaker 35MM Pole Stand Adapter assembly kit PN 40 010 971 01 0 36 lb 0 16 kg This large base stand adapter can be used to mount the MYA MINA LINA Yoke or MUB MINA LINA on a pole to allow easy tilting...

Page 25: ...s MG MINA LINA 750 LFC Multipurpose Grid Fitted with GLK for improved load rating when hanging 750 LFC MVP Motor Vee Plate Attached to front center of grid with two motors to adjust the horizontal aim...

Page 26: ...nets 750 LFC CARDIOID ARRAYS The 750 LFC loudspeaker can be configured in cardioid arrays to reduce undesirable low frequency leakage behind the loudspeakers The loudspeaker s linearity ensures that c...

Page 27: ...uick release pins to securely link adjacent loudspeakers in flown and groundstacked array configurations NOTE For more information about the MRK 750 rigging kit including its kit contents weight and i...

Page 28: ...o circumstance should all six links be used at the same time as this approach will not add any load capability In fact the load capacity will decrease by about half of that provided by the rear links...

Page 29: ...les Thefront and rearGuideALinks attach at angles of 0 1 5 3 25 or 4 75 allowing for curved 750 LFC arrays Because the cabinet s front and rear GuideALinks are symmetrical the curved arrays can also i...

Page 30: ...port the weight of the mounted loudspeakers and that they are installed according to the manufacturer s instructions One ULTRA X40 42 loudspeaker 55 lb 25 kg One MINA or LINA loudspeaker with MUB MINA...

Page 31: ...e used to support 750 LFC loudspeakers in groundstacked configurations The caster frame for 750 LFC cabinets equipped with the MRK 750 rigging includes four fixed 0 link slots that attach to the cabin...

Page 32: ...r more secure transport because the bottom cabinet can be linked and pinned to the caster frame The three cabinets can be linked and pinned together as well TIP Durable nylon pullover covers sized for...

Page 33: ...ould only be used to move the MCF 750 caster frame when cabinets have been outfitted with the MRK 750 rigging kit and the cabinets have been securely linked When lifting a stack with a forklift always...

Page 34: ...ER FRAME WITH RIGGING MCF 750 Caster Frame with Rigging Weight 34 lbs 15 4 kg Figure 29 MCF 750 Caster Frame Dimensions for cabinets with rigging 24 91 in 633 mm 24 16 in 614 mm 24 16 in 614 mm 17 14...

Page 35: ...TER FRAME WITHOUT RIGGING MCF 750 Caster Frame without Rigging Weight 28 7 lbs 13 0 kg Figure 30 MCF 750 Caster Frame Dimensions for cabinets without rigging 24 16 in 614 mm 24 91 in 633 mm 17 14 in 4...

Page 36: ...750 LFC OPERATING INSTRUCTIONS 36...

Page 37: ...S module of that particular loudspeaker Conversely a loudspeaker can be identified in Compass RMS by pressing the Identify button on the loudspeaker s RMS module Loudspeaker icons can be arranged in C...

Page 38: ...functions eliminating any possibility of accidentally mut ing loudspeakers RMS Network Connectors The Weidmuller 2 conductor locking connectors transfer data to and from the RMS network Two connector...

Page 39: ...on of the environment in which they operate including air temperature pressure humidity and the location of prediction surfaces Importing both CAD DXF and Sketchup SKP files containing detailed venue...

Page 40: ...ludes custom designed settings for each family of speakers as well as to integrate families together For example the Product Integration feature matches the phase characteristics between Meyer speaker...

Page 41: ...h stainless steel screws provided 3 Make sure to tighten the screws to create a good seal against the user panel Meyer Sound recommends using a torque value of 10 12 in lbs 1 1 1 4 N m 750 LFC COLLAPS...

Page 42: ...750 LFC OPERATING INSTRUCTIONS 42...

Page 43: ...it may be higher depending on EQ and boundary loading Pink noise is a full bandwidth test signal with a peak to RMS ratio of 12 5 dB B noise is a Meyer Sound test signal that ensures measurements refl...

Page 44: ...lifiers to system operator s host computer PHYSICAL Dimensions 21 80 in 554 mm W 20 30 in 515 mm H 20 88 in 530 mm D Dimensions with rigging 21 55 in 547 mm W 20 43 in 519 mm H 20 88 in 530 mm D Weigh...

Page 45: ...mm 21 8 in 478 mm 18 8 in 515 mm 20 3 in 530 mm 20 9 in 6 mm 2 in 279 mm 11 0 in 248 mm 9 8 in 1 1 2 in 38 mm U S 1 3 8 in 35 mm E U M20 thread at the bottom 750 LFC dimensions without rigging and wi...

Page 46: ...55 in 547 mm 21 55 in 519 mm 20 43 in 1 1 2 in 38 mm U S 1 3 8 in 35 mm E U M20 thread at the bottom 530 mm 20 88 in 6 mm 25 in 251 mm 9 88 in 277 mm 10 90 in 750 LFC dimensions with rigging and rain...

Page 47: ...tial area is likely to cause harmful interference in which case the user will be required to correct the inter ference at their own expense This device complies with Part 15 of the FCC rules Operation...

Page 48: ...750 LFC OPERATING INSTRUCTIONS 48...

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Page 52: ...Meyer Sound Laboratories Inc 2832 San Pablo Avenue Berkeley CA 94702 1 510 486 1166 meyersound com 2018 2020 Meyer Sound All rights reserved 750 LFC Operating Instructions PN 05 271 005 01 C...

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