User manual
QT ZM66M 
User Manual
User Manual Q-Tech Commercial Series
QT ZM66M
2
WARNING
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 
Quest 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 Quest 
dealer.
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.
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 earth terminal to • 
avoid electric shock.










