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FRONT PANEL
INPUT SENSITIVITY (1)
The maximum input gain (minimum sensitivity rating) is achieved at the full clockwise setting, and this setting
yields the maximum mixer/system headroom. A setting of less than full clockwise will yield lower system noise
at the expense of mixer/system headroom. Calibration indicates sensitivity in dBV necessary to attain the full
available rated output power.
POWER LED (2)
Illuminates when AC power is being supplied to the amp, and the associated channel is operational. If either
channel were to experience fault conditions or to exceed the safe operating temperature limits, then that channel
will shut down, and the associated power LED will cease to illuminate, indicating such conditions exist. Also,
whenever the BRIDGE mode is selected, the power LED of channel B is defeated (OFF), just as if there were a
fault condition on channel B. This provides a positive indication that the VX-1.5K is configured for bridge
mode.
DDT ACTIVE LED (3)
Illuminates when DDT Compression is taking place in that channel. With the ENABLE/DEFEAT switch in the
DEFEAT position, this LED indicates when clipping distortion is occurring in that channel.
CIRCUIT BREAKERS (4)
The VX-1.5K uses circuit breakers in place of main fuses. These breakers arc provided to limit the current to the
associated power transformer for each channel, and thereby offer protection from overheating and possible
destruction due to fault conditions in the amplifier. The. breaker trip current value has been carefully chosen to
allow continuous power output performance, yet still provide adequate protection for the power transformer.
Normally these breakers should not trip unless there is a fault in the amp circuitry that draws excessive mains
current. However, abnormal conditions such as a short circuit on either or both channels or continuous operation
at overload or clipping, especially into 2 ohm load will cause the breaker to trip. If this occurs simply reset the
breaker and correct the cause of the overload. When tripped, the button on the breaker will be outward nearly
1/2", and can be reset by pushing inward. A normal reset button length is about 1/4". If this ''thermal" type
breaker does trip, then simply pushing the button back in will reset it after waiting a brief period of time to allow
it to cool down. If the breaker trips instantly each time you attempt to reset it. then the unit should be taken to a
qualified service center for repair.
POWER SWITCH (5)
Depress to T position to turn on.
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