5
IMPORTANT NOTES
In addition to the items listed under “USING THE
UNIT SAFELY” on page 2, please read and observe
the following:
Power Supply
• Do not use this unit on the same power circuit with any
device that will generate line noise (such as an electric
motor or variable lighting system).
• The AC adaptor will begin to generate heat after long
hours of consecutive use. This is normal, and is not a
cause for concern.
• Before connecting this unit to other devices, turn off the
power to all units. This will help prevent malfunctions
and/or damage to speakers or other devices.
Placement
• Using the unit near power amplifiers (or other equipment
containing large power transformers) may induce hum.
To alleviate the problem, change the orientation of this
unit; or move it farther away from the source of
interference.
• This device may interfere with radio and television
reception. Do not use this device in the vicinity of such
receivers.
• Do not expose the unit to direct sunlight, place it near
devices that radiate heat, leave it inside an enclosed
vehicle, or otherwise subject it to temperature extremes.
Excessive heat can deform or discolor the unit.
Maintenance
• For everyday cleaning wipe the unit with a soft, dry
cloth or one that has been slightly dampened with
water. To remove stubborn dirt, use a cloth impregnated
with a mild, non-abrasive detergent. Afterwards, be sure
to wipe the unit thoroughly with a soft, dry cloth.
• Never use benzene, thinners, alcohol or solvents of any
kind, to avoid the possibility of discoloration and/or
deformation.
Additional Precautions
• Use a reasonable amount of care when using the unit's
buttons, sliders, or other controls; and when using its
jacks and connectors. Rough handling can lead to
malfunctions.
• When connecting / disconnecting all cables, grasp the
connector itself—never pull on the cable. This way you
will avoid causing shorts, or damage to the cable's
internal elements.
• To avoid disturbing your neighbors, try to keep the unit's
volume at reasonable levels (especially when it is late at
night).
• When you need to transport the unit, package it in the
box (including padding) that it came in, if possible.
Otherwise, you will need to use equivalent packaging
materials.
Contents
USING THE UNIT SAFELY ................................ 2
Main Features ............................................... 4
IMPORTANT NOTES ........................................ 5
About Acoustic Feedback .......................... 6
What Is Acoustic Feedback? .......................... 6
To avoid feedback, it is necessary to: ............. 6
Using the AF-70 ............................................. 6
Panel Descriptions ........................................ 7
Making the Connections ............................. 9
About Auto Adjust ...................................... 10
Caution when using the auto adjust function ... 11
How to Use Auto Adjust .............................. 11
About the Safety Margin .............................. 12
About Anti-Feedback Filter Bandwidth ........ 12
About the Lock Function ........................... 12
About the Function Setting Switches ........ 13
FILTER WIDE ............................................... 13
DYNAMIC ................................................... 13
DIFFUSE ...................................................... 13
LIMITER ....................................................... 13
ENHANCER ................................................. 13
LOW-CUT/HI-CUT ...................................... 13
When using the unit by itself ..................... 13
Option ......................................................... 13
Specifications ............................................. 14
