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When Using the Amplifier
Make sure that the volume control is turned to minimum position before power is
switched on. Loud sound produced at high volume when power is switched on may
impair hearing.
DO NOT place heavy objects on the amplifier, for it may cause it fall and may result
in body injury and/or property damage. Besides, the object itself may cause
damaged or body injury.
DO NOT operate the amplifier for the extended period of time with the sound
distorting. It is an indication of malfunction, which can cause heat and result in fire.
Switch the power off, and unplug the power supply plug from the AC outlet for safety
purposes, when cleaning or leaving the amplifier unused for 7 days or more. Fire or
electric shock may occur.
If the dust accumulates on the power supply plug or in the wall AC outlet, fire may
result in. Clean it periodically. In addition, make sure the plug is inserted in the
wall outlet securely.
Contact your local dealer to clean the dust, it the dust has accumulated in the
amplifier for a long period of time. Dust accumulation may result in fire or damage.
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Description
QSB-6xxE series booster amplifiers cover models from 120W RMS to 480W RMS. This
manual is for 360W QSB-636E and 480W QSB-648E.
QSB-6xxE series is easy to use booster amplifier. It has one phone jack and one XLR
jack as input; and the same as output. And there is one screw speaker output terminal for
the direct connection to 8 ohm, or 70V, or 100V speaker.
There is only one set of LED as power on and level indicators on the front panel. On the
rear panel the sensitivity selection switch is for the sensitivity 100mV or 1V selection.
Beside the switch, there is one gain control for the input signal adjustment.
Besides 115 / 230V AC power source, QSM-6xxE series booster amplifier also accept DC
24V battery power source as backup power.
To ensure the amplifier working normally and safe operation, it has speaker short, over
temperature, and overload protection function.
QSM-6xxE series is simple and easy to use booster amplifier.
