VHD4.21 · AC Power Requirements
VHD4.21 · A
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Voltage Requirements
The VHD4.21 operates safely and without audio discontinuity if the AC voltage stays within the operating window
of 160V-260V at 50 or 60Hz. The VHD4.21 operates in 230V mode. The VHD4.21 features constant power source array
ensuring the power remains the same in case of power drops.
CAUTION: If the On LED does not illuminate or the system does not respond to audio input, remove AC power
immediately. Verify that the voltage is within the proper range. If the problem persists, please contact KV2
Audio or an authorized service center.
If the voltage drops below the low boundary of its safe operating range, the loudspeaker will shut down if the voltage
does not rise above the low boundary before storage circuits are depleted. How long the loudspeaker will continue to
function during brownout depends on the amount of voltage drop and the audio source level during the drop.
If the voltage increases above the upper boundary of the range, the power supply can be damaged.
NOTE: It is recommended that the voltage supply be within the rated voltage window. This ensures that AC
voltage variations from the service entry-or peak voltage drops due to cable runs-do not cause the amplifier to
cycle on and o or cause damage to the power supply.
Make sure that even with the AC voltage drop, the AC voltage always stays within recommended operating ranges.
The minimum electrical service amperage required by a VHD4.21 speaker system is the sum of each loudspeaker's
maximum continuous rms current. An additional 50 percent above the minimum amperage is recommended to
prevent peak volt-age.
AC Power
The VHD4.21 is an advanced self-powered loudspeaker system with on-board amplification and control systems.
Understanding power distribution, voltage and current requirements, as well as electrical safety issues, is critical to the
safe operation of the VHD4.21.
The VHD4.21 uses a PowerCon 3-pole AC main system with locking connectors to prevent accidental disconnection.
The main AC connector (blue) serves as the power input.
The Power Connector
The VHD4.21 requires a grounded outlet. It is very important that the loudspeaker AC supply be properly grounded
in order to operate safely and correctly. PowerCon 32A AC cable-wiring diagram to create international or special-
purpose power connectors:
Power connector assembly
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