2
3
Contents
Quick Start .......................................................................................... 3
A Look at Your Amplifier..................................................................... 6
Front View........................................................................................................ 6
Rear View ......................................................................................................... 7
Preparation.......................................................................................... 8
Placing the Amplifier ...................................................................................... 8
Placing Speakers ............................................................................................. 8
Presetting the Controls................................................................................... 8
Presetting the Audio Input Sources......................................................... 8
Presetting the Amplifier............................................................................ 8
Tips for Speaker Connection ......................................................................... 9
Total Speaker Impedance......................................................................... 9
Proper Phasing .......................................................................................... 9
About Speaker Terminals ......................................................................... 9
Determining the Speaker Wire Length ................................................... 9
Connections ...................................................................................... 10
Connecting Speaker Wires to the Amplifier............................................... 10
Connecting One Speaker............................................................................. 10
Connecting Two Speakers in Series ............................................................ 11
Connecting Two Speakers in Parallel .......................................................... 11
Connecting Four Speakers in Series and Parallel Combination ............... 12
Connecting Speakers with Transformers .................................................... 13
Troubleshooting ................................................................................ 15
Specifications .................................................................................... 16
Care and Maintenance...................................................................... 16
Replacing the DC Power Cord’s Fuse ......................................................... 16
Safety ................................................................................................ 17
Do Stuff ............................................................................................. 19
Limited Warranty............................................................................... 20
Contents
Quick Start
Quick Start
Follow these steps to quickly set up your PA Amplifier. For detailed operation
instructions, see Pages 6-14.
Step 1 Connect optional components (microphones,
tuners, turntables, CD players, tape decks, or extra
AMPLIÞERTOEXPANDYOURSYSTEM
PHONO
Connect low-level sound sources, such as a turntable.
Note:
Set the
PHONO AUX/CD
switch to
PHONO
.
AUX/CD
Connect high-level sound
sources, such as CD player,
tape deck, or tuner.
MIX BUS
Use a shielded cable with
phono plugs to connect to
another MP-40 amplifier.
PHONO AUX/CD
Caution:
Before connection, turn off your amplifier and components and set
their volume controls to minimum. To prevent hum and other noise, use low-
capacitance shielded cables.
3TEP #ONNECTSPEAKERSTOYOURAMPLIÞER
Connect your speakers together in series, in parallel, or in series and parallel
combination. Then connect the speaker’s negative terminals to amplifier’s
COM
terminal, and their positive terminals to the amplifier’s
4
,
8
,
16
, or
70V
terminal.
MIC 1, MIC 2
Connect up to two
microphones.