Electro-Voice MA-606 User manual

Electro-Voice®®
®®
®
MA-606 User Manual
User Manual
MA-606
Professional Mixer/Amplifier

Electro-Voice®®
®®
®
MA-606 User Manual
Table of Contents
Typical Connections ............................................................................... 3
Features ................................................................................................. 2
Description ............................................................................................. 2
Installation .............................................................................................. 3
Grounding .................................................................................. 3
Ventilation .................................................................................. 3
Key Input Connections ............................................................... 3
Typical Connectons ................................................................... 4
Output Connections ................................................................... 6
Hig Impedance/Constant-Voltage Systems .............................. 7
Operation ................................................................................................ 8
Front Panel Controls .................................................................. 8
Rear Panel Controls and Connections ....................................... 9
Appendix A: Limited Warranty .............................................................. 13
Exclusions and Limitations....................................................... 13
Obtaining Warranty Service ..................................................... 13
Ot er Rig ts ............................................................................ 13
Appendix B: Safety Guidelines ............................................................. 14
AC Power Supply..................................................................... 14
DC Power Supply .................................................................... 14
Safety Precautions................................................................... 14
Tec nical Specifications ....................................................................... 16

Electro-Voice®®
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MA-606 User Manual
Page 2
Features
•Level controls for each input and a master volume control.
•Individual bass and treble tone controls.
•Automatic muting circuit with threshold adjustment.
•600 ohm transformer-isolated line input for paging, with
automatic muting of all other inputs.
•Low distortion.
•Output protection circuit.
•Au iliary line level inputs with internal mi ing for stereo source.
•Balanced line level output.
•Insertion point between preamp and amplifier.
•Phantom power on all microphone inputs enables microphones
to be used without separate power supplies.
Description
The MA series products provide background music and allow paging in
environments such as churches, small businesses, and professional
offices.
The inputs include 4 combination balanced or unbalanced Microphone/
AUX level connections, 2 stereo AUX summing inputs, telephone paging
and Power Amp In connections. Inputs to Mic 1 can be set to
automatically mute the other Mic and AUX level input channels.
Input sources to Au 1 and 2 may include: tape players, compact-disc
players, AM/FM tuners, mi er-preamplifiers or wireless microphones.
The telephone paging input accepts the signal from a standard 600 ohm
paging line.
The Power Amp In jack, along with the Preamp Out jack, is provided to
insert an equalizer or other signal processing device before the power
amplifier.
The amplifier includes protection circuitry to prevent damage from either
open or shorted speaker lines.
An adjustable automatic muting circuit mutes all other inputs when the
paging input is activated.

Electro-Voice®®
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MA-606 User Manual
Page 3
Installation
To avoid hum in the output, be certain that all input cables are physically
separated from power wiring and transformers. Speaker cables should
also be kept away from input cables and power cables.
An e ample of what sources and output devices would be connected to
this unit is shown in Figure 1.
Grounding
Ground the chassis of the unit by using the ground terminal located on
the back panel. For the best grounding, connect the amplifier to an earth
ground such as a cold water pipe or ground rod. If additional equipment
is installed along with the amplifier, make sure their chassis are
connected together to reduce noise and hum.
Ventilation
To remove the heat generated by the power amplifier, provide ample
ventilation around the unit. Avoid blocking or impeding the vent slots in
the cabinet.
Locate the unit where it is free from direct sunlight, humidity, dust and
vibration.
Key Input Connections
Microphones. The Mic inputs are for use with balanced Low Impedance
(appro imately 200 ohms) or unbalanced high impedance
(appro imately 20k ohms) microphones. For high impedance
microphones, cables should be as short as possible in order to avoid
loss of High Frequency response. The results will vary with the
microphone and cable capacitance. However, a limit of 30 feet is
recommended.
The Mic inputs may be accessed by either XLR connectors or ¼ phone
plugs.
Figure 2 shows the wiring configurations of both unbalanced and
balanced microphones using either ¼ or XLR type connectors.

Electro-Voice®®
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MA-606 User Manual
Page 4
Typical Connections
Figure 1:
Typical Connections