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Rane MA 4 Instruction Manual

Other manuals for MA 4: Operator's Manual, Operator's Manual, Datasheet

Summary of MA 4

  • Page 1

    Ma 4 multichannel amplifier contents (in order of appearance) important safety instructions ma 4 manual ma 4 data sheet mt 4 data sheet constant-voltage audio distribution systems sound system interconnection warranty declaration of conformity 21583 digit al amplifier db headroom db headroom db head...

  • Page 2

    Attention: risque de chocs electrique - ne pas ouvrir risk of electric shock do not open caution to reduce the risk of electrical shock, do not open the unit. No user serviceable parts inside. Refer servicing to qualified service personnel. The symbols shown below are internationally accepted symbol...

  • Page 3

    Attention: risque de chocs electrique - ne pas ouvrir risk of electric shock do not open caution afin d’éviter tout risque de choc électrique, ne pas ouvrir l’appareil. Aucune pièce ne peut être changée par l’utilisateur. Contactez un sav qualifié pour toute intervention. Les symboles ci-dessous son...

  • Page 4

    Manual-1 ma 4 multichannel amplifier digital amplifier db headroom db headroom db headroom db headroom 3 6 12 24 limit 1 comp exp fault load ready 3 6 12 24 limit 2 comp exp fault load ready 3 6 12 24 limit 3 comp exp fault load ready 3 6 12 24 limit 4 on comp exp fault load ready ma 4 operators man...

  • Page 5

    Manual-2 description & operation • each channel delivers 100 watts of power into a 4 or 8Ω load (constant power). º average load impedance is estimated, then used to set the limiter to confine the maximum average power to 100 watts. • universal voltage , power-factor-corrected power supply (see figu...

  • Page 6

    Manual-3 • individual fault flag ports are provided for each channel. º when a fault is detected on power up, the channel or channels affected are not enabled, and the appropriate front panel fault indicators are lit. A detected fault is re-tested every 10 seconds. º when a channel develops a fault ...

  • Page 7

    Manual-4 ma 4 100-240v 50/60 hz 500 watts rane corp. Class 2 wiring outputs active low use rane vr 2 or 20 k Ω pot high-pass 20hz 40hz 60hz 80hz on 4 + – + – + – + – + – + – + – + remote level 4 4 flag 3 2 1 fault vr vc vr vc vr vc vr vc – + – + – + – + – + – + – + – + – 3 2 1 master slave comp 4 3 ...

  • Page 8

    Data sheet-2 ma 4 multichannel amplifier specifications parameter specification conditions/comments input impedance 10 kΩ each leg, differential, 1 khz maximum input +22 dbu sensitivity range/resolution +22 to +4 dbu 256 steps remote level control range/resolution attenuate only; 0 db to –80 db audi...

  • Page 9

    Data sheet-3 ma 4 multichannel amplifier ma 4 100-240v 50/60 hz 500 watts rane corp. Class 2 wiring outputs active low use rane vr 2 or 20 k Ω pot high-pass 20hz 40hz 60hz 80hz on 4 + – + – + – + – + – + – + – + remote level 4 4 flag 3 2 1 fault vr vc vr vc vr vc vr vc – + – + – + – + – + – + – + – ...

  • Page 10

    Data sheet-4 ma 4 multichannel amplifier power-factor- correction switch-mode power supply t u p n i g a l f t l u a f 1 h c 1 e v a l s / r e t s a m b d 3 b d 6 b d 2 1 b d 4 2 combination controller d r a w r o f w s - 2 e s u f r e t l i f i m e h s u r n i e g a t l o v r e v o h 3 g 2 n 1 c e ...

  • Page 11

    Data sheet-5 ma 4 multichannel amplifier power-factor- correction switch-mode power supply t u p n i g a l f t l u a f 1 h c 1 e v a l s / r e t s a m b d 3 b d 6 b d 2 1 b d 4 2 combination controller d r a w r o f w s - 2 e s u f r e t l i f i m e h s u r n i e g a t l o v r e v o h 3 g 2 n 1 c e ...

  • Page 12

    Data sheet-6 ma 4 multichannel amplifier power-factor-correction (pfc) near perfect power-factor with ⅓ the peak current and ½ the average current (green) compared to non power-factor-corrected supply with conduction of 3 ms (black). The response is mea- sured at 100 watts. Architectural specificati...

  • Page 13

    Data sheet-1 mt 4 multichannel transformer features • four channels, 100 watts, 100 / 70 volt • input 8Ω, 100 watts • euroblock strain-relief connectors • 1u, 19 inch rackmount tray • frequency response 40 hz to 20 khz +0, -1 db • separate mounting tray and individual transformers available options ...

  • Page 14

    Data sheet-2 mt 4 multichannel transformer parameter specification limit units conditions/comments transformer rating 100 watts maximum average power 30 watts maximum continuous average power ..........Connectors chassis mounted euroblock strain relief ..........Chassis 1u rack-mount tray input volt...

  • Page 15: Ranenote

    Constant-voltage- constant-voltage audio distribution systems: 25, 70.7 & 100 volts • background — wellspring • u.S. Standards — who says? • basics — what is “constant” anyway? • voltage variations — make up your mind • calculating losses — chasing your tail • wire size — how big is big enough? • ra...

  • Page 16

    Constant-voltage- stemming from this need to minimize cost, maxi- mize efficiency, and simplify the design of complex audio systems, thus was born constant-voltage. The key to the solution came from understanding the electric company cross-country power distribution practices. They elegantly solved ...

  • Page 17

    Constant-voltage- 8Ω 8Ω power (loudness) taps 7o.7 v @ full power amp amp in in amp 8 Ω 8 Ω 7o.7 v @ full power power (loudness) taps figure 1. Low-inpedance series-parallel 8Ω direct drive figure 2. 70.7v transformer-coupled constant-voltage distribution system figure 3. 70.7v direct-drive constant...

  • Page 18

    Constant-voltage-4 voltage variations — make up your mind the particular number of 70.7 volts originally came about from the second way that constant-voltage distribution reduced costs: back in the late ’40s, ul safety code specified that all voltages above 100 volts peak (“max open-circuit value”) ...

  • Page 19

    Constant-voltage- wire size – how big is big enough? Since the whole point of using constant-voltage dis- tribution techniques is to optimize installation costs, proper wire sizing becomes a major factor. Due to wire resistance (usually expressed as ohms per foot, or meter) there can be a great deal...

  • Page 20

    Constant-voltage-6 ©rane corporation 10802 47th ave. W., mukilteo wa 98275-5000 tel 425-355-6000 fax 425-347-7757 web rane.Com doc 103210 3-16 rane constant voltage transformers rane offers several models of constant-voltage trans- formers. The design of each is a true transformer with separate prim...

  • Page 21: Ranenote

    Interconnection-1 introduction this note, originally written in 1985, continues to be one of our most useful references. It’s popularity stems from the continual and perpetual difficulty of hooking up audio equipment without suffering through all sorts of bizarre noises, hums, buzzes, whistles, etc....

  • Page 22

    Interconnection-2 ground loops almost all cases of noise can be traced directly to ground loops, grounding or lack thereof. It is important to understand the mechanism that causes grounding noise in order to effectively eliminate it. Each compo- nent of a sound system produces its own ground in- ter...

  • Page 23

    Interconnection-3 the absolute best right way to do it the method specified by aes48 is to use balanced lines and tie the cable shield to the metal chassis (right where it enters the chassis) at both ends of the cable . A balanced line requires three separate conduc- tors, two of which are signal (+...

  • Page 24

    Interconnection-4 another way to create the necessary isolation is to use a direct box. Originally named for its use to convert the high impedance, high level output of an electric guitar to the low impedance, low level input of a re- cording console, it allowed the player to plug “directly” into th...

  • Page 25

    Interconnection-5 buzzing, there is an incompatibility somewhere in the system’s grounding configuration. In addition to these special cable assemblies that may help, here are some more things to try: 1. Try combinations of lifting grounds on units sup- plied with lift switches (or links). It is wis...

  • Page 26: To Input

    Interconnection-6 figure 4. Interconnect chart for locating correct cable assemblies on the following pages. Note: (a) this configuration uses an “off-the-shelf” cable. Note: (b) this configuration causes a 6 db signal loss. Compensate by “turning the system up” 6 db. To input male balanced xlr ¼" b...

  • Page 27: Input

    Interconnection-7 10 9 s=shield r=nc t=red s=shield r=nc t=red 8 7 s=shield r=black t=red s=shield r=black t=red male 6 5 3=black black 4 3 3=nc 2=red 1=shield shield shield 2 female 1 3=black 2=red 1=shield male b b b b s=nc r=black t=red s=shield r=black t=red 11 cross-coupled output only: connect...

  • Page 28: Input

    Interconnection-8 doc 102907 ©rane corporation 10802 47th ave. W., mukilteo wa 98275-5000 usa tel 425-355-6000 fax 425-347-7757 web www.Rane.Com 22 21 male (any unbalanced connector) (any unbalanced connector) (check: no standard polarity on euroblocks) (check: no standard polarity on euroblocks) 20...

  • Page 29

    Warranty factory authorized service your unit may someday need to be serviced by the rane factory if you live in the usa. International customers should contact your dealer or distributor for service. You must call the rane factory before shipping. Please do not return your unit to rane without prio...

  • Page 30

    Warranty procedure - valid in usa only notice! You must complete and return the warranty card or register your product online to extend the warranty from 2 years to 3 years! To validate your extended warranty: use the postcard that came in the box with your unit, or go to www.Rane.Com and click on n...

  • Page 31

    Declaration of conformity application of council directive(s): 2002/96/ec 2004/108/ec 2011/65/eu manufacturer: rane corporation 10802 47th avenue west mukilteo wa 98275-5000 usa this equipment has been tested and found to be in compliance with all applicable standards and regulations applying to the...

  • Page 32: Ma 4

    Ma 4 multichannel amplifier ma 4 100-240v 50/60 hz 500 w atts rane corpora tion class 2 w iring outputs active low use rane vr 2 or 20 k Ω pot high-p ass 20hz 40hz 60hz 80hz on 4 + – + – + – + – + – + – + – + remote level 4 4 flag 3 2 1 f a u lt vr vc vr vc vr vc vr vc – + – + – + – + – + – + – + – ...