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 Be sure to read the instructions in this section carefully before use.
 Make sure  to observe  the instructions in this manual as the conventions of safety symbols and messages
 regarded as very important precautions are included.
 We also recommend you keep this instruction manual handy for future reference.

Safety Symbol and Message Conventions

Safety  symbols and messages  described  below are used in this manual  to prevent  bodily injury and  property 
damage  which  could  result  from  mishandling.  Before  operating  your  product,  read  this  manual  first  and
understand the safety symbols and messages so you are thoroughly aware of the potential safety 

Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.

Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.

When Installing the Unit

   Do not  expose  the unit   to rain or an  environment
   where it may be splashed by  water or other liquids, 
   as doing so may result in fire or electric shock.

   Use the unit only with the voltage   specified  on the
   unit.  Using  a  voltage  higher  than  that  which  is
   specified may result in fire or  electric shock.

   Do not cut, kink, otherwise damage   nor modify the
   power  supply  cord.  In  addition,  avoid  using  the
   power cord in close proximity to heaters,  and never
   place heavy objects -- including the unit   itself -- on 
   the  power  cord,  as  doing so may result  in  fire or  
   electric shock.

 Be sure  to replace  the unit's   terminal  cover  after
 connection  completion.  Because  high  voltage   is
 applied to the speaker terminals, never touch these  
 terminals to avoid electric shock.

 Be  sure  to  ground  to  the  safety   ground  (earth)
 terminal to avoid electric shock. Never   ground to a 
 gas pipe as a catastrophic disaster may result.

 Avoid  installing  or  mounting  the  unit  in  unstable
 locations, such  as   on a rickety  table   or  a slanted
 surface.  Doing  so  may  result  in  the  unit   falling
 down,   causing   personal   injury  and/or  property 
 damage.

When the Unit is in Use

   Should  the  following  irregularity  be  found  during 
   use, immediately switch  off  the  power, disconnect
   the  power  supply   plug  from  the  AC  outlet  and 

   contact  your  nearest  

  dealer. Make no further

   attempt  to operate the unit in this   condition as  this
   may cause fire or electric  shock.
     If  you  detect  smoke  or  a strange  smell coming
     from the unit.
     If water or any metallic object gets into the unit
     If the unit falls, or the unit case breaks
     If the power supply cord is damaged (exposure  of
     the core, disconnection, etc.)
     If it is malfunctioning (no tone sounds.)

   To prevent  a fire or electric  shock, never open  nor
   remove  the  unit  case  as  there  are  high  voltage 
   components  inside  the  unit.  Refer all servicing to
   your nearest  

 dealer.

Myers

Myers

 Do  not  place  cups,  bowls,   or other containers  of
 liquid  or  metallic  objects on top  of the unit. If  they 
 accidentally spill  into the unit, this may cause  a fire 
 or electric shock.

  Do   not   insert    nor   drop    metallic    objects   or 
  flammable  materials  in  the   ventilation slots  of the
  unit's  cover,  as  this  may  result   in  fire  or electric
   shock.

3

1. SAFETY PRECAUTIONS

Summary of Contents for AMPLIFIER

Page 1: ...INE2 LINE1 MIC LEVEL TREBLE TREBLE BASS BASS TREBLE TREBLE TREBLE BASS BASS MIXER ZONE AMPLIFIER VOLUME CHIME SIREN CHIME SIREN DC ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ALL CALL 2 4 8 0 CLIP PROT ON OFF AC MI 120S TREBLE BASS BASS 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 MIC1 MIC2 MIC3 MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX LINE LEVEL 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3...

Page 2: ... 1 SAFETY PRECAUTIONS 3 2 GENERAL DESCRIPTION 5 3 FEATURES 5 4 NOMENCLATURE AND FUNCTIONS 4 1 Front Panel 6 4 2 Rear Panel 7 5 OPERATING 9 6 APPLICATIONS 10 7 SPECIFICATIONS 11 8 BLOCK DIAGRAM 12 9 DIMENSIONAL DIAGRAM 13 ...

Page 3: ...in fire or electric shock Be sure to replace the unit s terminal cover after connection completion Because high voltage is applied to the speaker terminals never touch these terminals to avoid electric shock Be sure to ground to the safety ground earth terminal to avoid electric shock Never ground to a gas pipe as a catastrophic disaster may result Avoid installing or mounting the unit in unstable...

Page 4: ... sooty smoke or steam as doing otherwise may result in fire or electric shock When the Unit is in Use Do not place heavy objects on the unit as this may cause it to fall or break which may result in personal injury and or property damage In addition the object itself may fall off and cause injury and or damage Make sure that the volume control is set to minimum position before power is switched on...

Page 5: ...rity muting Switchable audio signal priority for MIC channels 1 1 EMC input signal over other input soures all 100V open the area 2 Remote MIC and Telephone input over SIREN CHIME MIC 1 4 LINE 1 2 input sources 3 MIC 1 SIREN CHIME over MIC 2 3 LINE 1 2 input sources siren The Mixer Zone Amplifier series is equiped with priority function They are designed to suit all PA system application in school...

Page 6: ... 12 5 MIN MAX MASTER VOLUME MIC4 LINE2 LINE1 MIC LEVEL TREBLE TREBLE BASS BASS TREBLE TREBLE TREBLE BASS BASS VOLUME CHIME SIREN CHIME SIREN DC ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ALL CALL 2 4 8 0 CLIP PROT ON OFF AC TREBLE BASS BASS 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 MIC1 MIC2 MIC3 MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX LINE LEVEL 1 2 3 4 5 6 1 2 3 4 5 6 ...

Page 7: ... power and certain unbalanced line level devices maymalfunction or produce an Audible hum when phantom power is active 22 MIC INPUT CHANNEL 1 4 This is a special connector which will accept either a 3 conductor XLR or a 3 conductor 1 3 jack These inputs are suitable to receive signal from microphones level devices 24V 24V 3 COLD 2 HOT 1 GNO 0V 23 24 25 26 LINE INPUT CHANNEL 1 2 This line level inp...

Page 8: ...r off for all channels When the switch is turned on 24V DC power is supplied to pins 2 and 3 of each channel s input connector Use phantom power when connecting cond enser microphones which require an external power supply 38 220 240V 50 60HZ POWER INPUT Pin 1 Remote amplifier input signal hot Pin 2 Remote amplifier input signal cold Pin 3 Signal ground Pin 4 Remote control 1 Speaker 1 Pin 5 Remot...

Page 9: ...er system in parallel you can connect speakers with a total rated input of up to 100W NOTE Be sure that total impedance is not less than rated impedance See upper chart WARNING Extreme care must be exercised when connecting high impedance systems as Potentially Hazardous voltages may be present at these terminals Do not install this equipment in a confined space with less than adequate ventilation...

Page 10: ... CHIME 2 TONE 4 TONE REMOTE MIC GAIN 70V 100V COM 100V COM 100V COM 100V COM 100V COM 100V ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 MICROPHONE WITH ZONE CONTROL 1 2 3 0 10 0 10 0 10 CHIME VOL MASTER VOL MIC VOL ON OFF POWER 24VDC 1 2 3 1 GND 2 GND 3 24DC CHIME 2 TONE 4 TONE TEL OUTPUT MIC ACTIVE OUT BATTERY 24DC MIC 2 MIC 1 MIC 4 MIC 3 ALARM IN ALARM OUT EMERGENCY PANEL AUDIO OUT R L AUDIO SOURCES MIC L...

Page 11: ...EBLE 10KHZ TONE CONTROL BASS 100HZ TREBLE 10KHZ FREQUENCY RESPONSE 3DB PRE AMP OUT MIC 1 4 LINE 1 2 TEL IN REMOTE IN T H D REMOTE MIC POWER SOURCE POWER CONSUMPTION WEIGHT DIMENSIONS mm TEL AUDIO INPUT 350W RMS 240W RMS 120W RMS 70W MAX 50W MAX 20W MAX MI 350S MI 240S MI 120S 2 45MV 5K BAL 245MV 5KohmBAL 250mV 47Kohm Better than 55dB Better than 65dB 100Hz 15KHz 80Hz 15KHz 12dB 12dB 24VDC 0 3V 10K...

Page 12: ...8 BLOCK DIAGRAM 8ohm 8ohm 12 ...

Page 13: ...HIME SIREN CHIME SIREN DC ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ALL CALL 2 4 8 0 CLIP PROT ON OFF AC TREBLE BASS BASS 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 MIC1 MIC2 MIC3 MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX LINE LEVEL 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 0 10 10 0 0 0 0 0 0 0 0 0 0 0 CHIME ACTIVE MIN MAX MASTER VOLUME MIC4 LINE2 LINE1 ...

Page 14: ...PUBLIC ADDRESS SYSTEM VersionV0 1 ...

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