Lowell MA30 Installation Sheet And Operators Manual Download Page 1

  

  

         

Optional Accessories (sold separately): 

Lowell  Manufacturing  offers  the  optional  30WK  wall  kit  (used  to  wall  mount  the  MA30  Mixer/Amplifier),  the  30RK 
rack  kit (used  to mount  the  MA30 Mixer/Amplifier in a 19" rack), the 30HRK  half-rack  kit (used  to mount  the  MA30 
Mixer/Amplifier  in  a  half  rack),  along  with  a  full  line  of  19"  equipment  cabinets,  half-rack  cabinets,  wall  mount 
shelves,  rack  mount  AC  power  panels,  AC  power  strips,  and  cooling  fans  that  can  be  used  to  install  the  Lowell 
Amplifier products.   See www.lowellmfg.com for product details. 

Getting Started:

Please study carefully the 

IMPORTANT SAFETY INSTRUCTIONS

” 

that are given on page 2 before applying power 

to  your  MA30  mixer/amplifier.    Those  experienced  with  the  use  of  a  mixer/amplifier  will  find  that  the  input  jacks, 
output  jacks, and  controls follow industry  standard conventions and will  be  very  intuitive.   Standard  4

W,

   8

W,

 25V, 

and  70V  speaker  outputs  are  provided.    Those  that  are  not  familiar  with  the  speaker  wiring  required  for  these 
industry standard outputs will find a  very helpful  section covering this topic  on  pages 6, 7, and 8 of this 

Installation 

Sheet and Owner

s Manual

.

1

REMOVABLE

PHOENI X

CONNECTOR

Instruction Sheet

IS-MA30

Issued: 2-8-19

Lowell Manufacturing Company

100 Integram Drive

Pacific, Missouri 63069 U.S.A.

Call: 800-325-9660

Fax: 636-257-6606

Click: www.lowellmfg.com

MA30

INSTALLATION SHEET

AND OPERATORS MANUAL  

1

MA30 General Description:

The MA30 is equipped with a 30 watt power amplifier with 4

W,

 8

W,

 25V, and 70V speaker outputs available at screw 

terminals.   The  unit  is  powered  by 120VAC  60Hz.   The  main  AC input  is  protected  by  a  circuit  breaker  on the rear 
panel.   An  unswitched  convenience  AC  outlet  is  provided  on  the  rear  panel  that  is  protected  by  a separate  circuit 
breaker.   The  mixer/amplifier  includes  3  input  channels.   The  first  channel (marked  MIC/TEL  on  the  front panel)  is 
switchable for microphone or telephone inputs and also includes a  switch to select the  AUX 2 dual combining RCA-
phono connectors.  This channel also includes a  TEL/MIC  switch.  In the TEL (telephone) position, this switch pads 
the input to allow  the channel to  be fed by  a 600

W

 balanced  line  level  telephone  page port  output signal.  The first 

channel  includes  a  MUTE  ON/OFF  switch.    When  the  mute  switch  is  turned  ON ,  a  dynamic  microphone  or 
telephone input  will  mute  the  AUX 1, Aux  3, or  Program  inputs.   The  second  channel  (marked  PROGRAM  on  the 
front panel) is switchable for program input screw terminals  or AUX  3 dual combining  RCA-phono connectors.  The 
third channel (marked AUX 1 on the front panel) is for the AUX 1 dual combining RCA-phono connectors.  The front 
panel also includes BASS and TREBLE controls, a power-on LED, and an output level LED indicator.

30RK

30HRK

30WK

Summary of Contents for MA30

Page 1: ...Missouri 63069 U S A Call 800 325 9660 Fax 636 257 6606 Click www lowellmfg com MA30 INSTALLATION SHEET AND OPERATORS MANUAL 1 MA30 General Description The MA30 is equipped with a 30 watt power amplifier with 4W 8W 25V and 70V speaker outputs available at screw terminals The unit is powered by 120VAC 60Hz The main AC input is protected by a circuit breaker on the rear panel An unswitched convenien...

Page 2: ...ompletely disconnect this apparatus from the AC mains disconnect the power supply cord plug from the AC receptacle This apparatus shall be connected to a mains socket outlet with a protective earthing connection When permanently connected an all pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in the electrical installation of the building If rack mou...

Page 3: ...r Amplifier 30W RMS AUX 1 Input AUX 1 Volume Control PROGRAM Volume Control G COM HOT PROGRAM Input AUX 3 Input MIC TEL Volume Control G COM HOT MIC TEL Input AUX 2 Input G COM 8W 8W 70V 25V COM 4W SPEAKER LEVEL OUTPUTS MUSIC ON HOLD MOH OUTPUT MOH Level Control Telephone Input Screw terminals switchable same terminals as mic input 100mV 10kW balanced Program Input Screw terminals 100mV 10kW balan...

Page 4: ...tomer Service to arrange for a replacement INITIAL PERFORMANCE CHECK GENERAL WIRING AND INSTALLATION GUIDELINES DO NOT run microphone cables near AC power wires data cables telephone cables or speaker wiring to avoid picking up extraneous signals in the sound system DO NOT run speaker output cables near data cables telephone cables or other low voltage wiring that could pick up the signal from the...

Page 5: ... plastic feet maintain the proper spacing under the amplifier for passive convection cooling Do not place anything on top of the amplifier where the vents on the top of the chassis would be blocked If the amplifier will be rack mounted we recommend that you provide a minimum of 1 75 of open space above and below the unit to assure proper ventilation Provide ventilation fans in the equipment cabine...

Page 6: ...the impedance of the amplifier output For example it is safe for the amplifier if the 8W output is used to drive an 8W load or a 16W load and it is safe for the 4W output to drive a 4W load or a 6W load but it is not safe for the 8W output to drive a 6W load and it is not safe for the 4W output to drive a 2W load Overloading the amplifier output can cause distortion and can damage the amplifier an...

Page 7: ... 5 watt 70V 25V dual voltage transformer That means that this speaker can be used on both 70V systems and 25V systems The 8W secondary of the transformer is connected directly to the 8W input terminals on the 810 speaker The primary has transformer taps for either 70V or 25V at 0 25W 0 5W 1W 2W and 5W When a designer is mapping out the coverage of these ceiling speakers he she will determined how ...

Page 8: ...that tapping the speakers at 1W is the best choice Some system designers feel it is best to tap the speaker transformers as high as possible Consider an example where a sound system that has a 125W 70V amplifier only has 10 speakers If the transformers are tapped at 0 25W each the total speaker load will be 0 25W X 10 speakers 2 5W If the amplifier is turned all the way up so its output is 70 volt...

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