Rane MA 4 Instruction Manual Download

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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

AMPLIFIER

dB Headroom

Limit

Comp

Exp

Fault

Load

Ready

Limit

Comp

Exp

Fault

Load

Ready

Limit

Comp

Exp

Fault

Load

Ready

Limit

Comp

Exp

Fault

Load

Ready

MA 4

Summary of Contents for MA 4

Page 1: ...e Audio Distribution Systems Sound System Interconnection Warranty Declaration of Conformity 21583 DIGITAL AMPLIFIER dB Headroom dB Headroom dB Headroom dB Headroom 3 6 12 24 Limit 1 Comp Exp Fault Lo...

Page 2: ...he power cord is the AC mains disconnect device and must remain readily operable To completely disconnect this apparatus from the AC mains disconnect the power supply cord plug from the AC receptacle...

Page 3: ...r le courant alternatif AC et doit absolument rester accessible Pour d connecter totalement l appareil du secteur d branchez le c ble d alimentation de la prise secteur 16 Cet appareil doit tre branch...

Page 4: ...nd Load status are indicated for each channel Extra Credit For remote turn on fault reporting and back up amplifier operations and remote level control wiring see page Manual 4 For FAULT FLAG operatio...

Page 5: ...or see metering indicates the load status The normal impedance range is 2 to 16 green Load indicator on Average load impedance is estimated over 180 ms and requires a minimum of 3 3 watts averaged ove...

Page 6: ...t The front panel fault indicator is then lit The Slave channel remains in low power standby Ready indicator flashing until a fault is detected fault flag no longer driven high by the Master channel W...

Page 7: ...r 10k to 100k may be connected to these inputs diagram at right MA 4 100 240V 50 60 Hz 500 WATTS RANE CORP Class 2 Wiring OUTPUTS Active Low Use Rane VR 2 or 20 k pot HIGH PASS 20Hz 40Hz 60Hz 80Hz ON...

Page 8: ...0 40 60 80 Hz dipswitch select Load sensing 2 to 16 normal Green Load indicator on Low load detect Below 2 is low Green Load indicator flashing High load detect Above 16 is high Green Load indicator o...

Page 9: ...s all channels Filters are 12 dB per octave Butterworth alignment 8 Each channel is set for MASTER or SLAVE operation Master channels write Fault Flag status Slave channels read Fault Flag status The...

Page 10: ...L U A F D A O L Y D A E R P X E B d 3 B d 6 B d 2 1 B d 4 2 T I M I L P M O C T L U A F D A O L Y D A E R P X E 4 H C 3 H C 2 H C 1 H C P S D T S O H D N G Y T I V I T I S N E S 4 H C 3 H C 2 H C 1 H...

Page 11: ...2 Z H 0 4 z H 0 6 z H 0 8 E D O M V 8 0 O T V 0 0 Y B D N A T S V 0 3 O T V 2 2 E T U M V 5 5 O T V 2 4 N O 1 M 2 M 3 M 4 M 1 M 2 M 3 M 4 M E S N E S Y L P P U S 5 2 R E T I M I L K A E P DETECT RMS...

Page 12: ...selection of 20 40 60 or 80 Hz highpass 2nd order Butterworth filters Load sensitive limiter circuits shall prevent clipping and the associated loss of speech intelligibility A front panel LED shall i...

Page 13: ...k connectors model KT 4 and individual transformers with mounting hardware model TF 4 are available separately allow ing the installer to build a tray with just the number of channels required see the...

Page 14: ...5178 DOC 108152 Rane Corporation 10802 47th Ave W Mukilteo WA 98275 5000 USA TEL 425 355 6000 FAX 425 347 7757 WEB rane com Rubber washer Rubber washer KT 4 tray Mounting washer 10 washer Nut Screw 1...

Page 15: ...1949 governing the interface between power amplifiers and loudspeakers used in distributed sound systems Installations em ploying ceiling mounted loudspeakers such as offices restaurants and schools...

Page 16: ...as the constant voltage distribution method Early mention is found in Radio Engineering 3rd Ed McGraw Hill 1947 and it was standardized by the American Radio Manufacturer s Association as SE 101 A SE...

Page 17: ...w different loudness levels in different coverage zones With this scheme the wire size is reduced considerably from that required in Fig ure 1 for the 70 7 volt connections Becoming more popular are v...

Page 18: ...for so many watts output at 70 7 volts and a loud speaker is rated for so many watts input producing a certain SPL Designing a system becomes a relatively simple matter of selecting speakers that wil...

Page 19: ...the first speaker where only 0 1414 amps are used to create the necessary 10 watts from here 14 00 amps flows on to the next speaker where another 0 1414 amps are used then 13 86 amps continues on to...

Page 20: ...7V tapped secondary KT 4 Open 1U tray chassis with connectors mounts four TF 4 transformers Use MT 4 transformers with any standard power amplifier and any combination of constant voltage loads up to...

Page 21: ...rconnections Grounding and EMC practices Shields of connectors in audio equipment containing active circuitry Rane s policy is to accommodate rather than dic tate However this document contains sugges...

Page 22: ...al grounding system improperly thus creating balanced equipment that is not immune to the cabling s noise currents This is one reason for the bad reputation sometimes given to bal anced interconnect A...

Page 23: ...n Figure 1b Recommmended practice CASE COMMON WRONG PRACTICE RECOMMENDED PRACTICE OPTIONAL CASE 1 2 3 3 1 2 CHASSIS GROUND SIGNAL GROUND CHASSIS GROUND CHASSIS GROUND Not using signal ground is the mo...

Page 24: ...consistent success indicates this and other acceptable solutions to RF issues exist though the increasing use of digital and wireless technology greatly increases the possibility of future RF problem...

Page 25: ...eferences 1 Neil A Muncy Noise Susceptibility in Analog and Digi tal Signal Processing Systems presented at the 97th AES Convention of Audio Engineering Society in San Fran cisco CA Nov 1994 2 Groundi...

Page 26: ...20 24 24 19 18 17 B B B B A A A A A A FEMALE BALANCED XLR NOT A TRANSFORMER NOR A CROSS COUPLED OUTPUT STAGE FEMALE BALANCED XLR EITHER A TRANSFORMER OR A CROSS COUPLED OUTPUT STAGE BALANCED TRS NOT A...

Page 27: ...RED SHIELD RED SHIELD SHIELD RED RED BLACK N C N C N C RED BLACK RED SHIELD N C BLACK RED BLACK RED 3 NC 2 RED 1 SHIELD 2 RED 1 SHIELD 3 BLACK 2 RED 1 NC 3 BLACK 2 RED 1 NC 3 BLACK 2 RED 1 SHIELD SHIE...

Page 28: ...3 BLACK 2 RED 1 SHIELD 3 BLACK 2 RED 1 SHIELD 3 BLACK 2 RED 1 SHIELD SHIELD BLACK SHIELD RED BLACK SHIELD RED BLACK RED SHIELD SHIELD BLACK RED SHIELD BLACK RED SHIELD BLACK RED SHIELD BLACK RED SHIE...

Page 29: ...WARRANTY SHALL BE THAT WHICH IS DESCRIBED TO THE ORIGINAL RETAIL PURCHASER BY THE AUTHORIZED RANE DEALER OR DISTRIBUTOR AT THE TIME OF PURCHASE Rane Corporation does not however warrant its products a...

Page 30: ...FACTORY IN THE U S If the product is being sent to Rane for repair please call the factory for a Return Authorization number We recommend advance notice be given to the repair facility to avoid possi...

Page 31: ...sponsibility of Rane Corporation Type of Equipment Professional Audio Signal Processing Brand Rane Model MA 4 Immunity Results THD N re 12 5W 8 400 Hz sine BW 20 20 kHz Baseline 72 dBr Test Descriptio...

Page 32: ...2 1 FAULT Vr Vc Vr Vc Vr Vc Vr Vc 3 2 1 MASTER SLAVE COMP 4 3 2 1 1 2 3 4 Vr Vc Vr Vc Vr Vc Vr Vc INPUTS MODE 13 22 dBu SENSITIVITY 4 3 13 22 dBu SENSITIVITY 4 2 13 22 dBu SENSITIVITY 4 1 13 22 dBu S...

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