KV2 Audio ESP4000 - Manual (Page 5)

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Rack Mounting
ESP4000’s will mount in standard 19” rack
systems. Integral rear mounting rack ears are
also provided for additional support. It is
important that you do not rely on fixing and
mounting the ESP4000 using just the front
panel as support. Use eight screws and wash-
ers to mount the amplifier to the equipment
rack rails (four for the fronts and four for the
rear). We recommend using a shock mounted
rack for touring use to prolong the life of your
ESP4000.
Cooling
The ESP4000 has a comprehensive cooling sys-
tem featuring chassis-sealed PCB board mount-
ing and shock mounted, speed controlled fans.
This means that the cooling system never
drives air across PCB boards, connectors or
components ensuring prolonged electronic
component lifespan and minimizing mainte-
nance cycles.
Air is drawn into the front of the amplifier by
the two fans on the rear panel, this passes over
the cooling fins of the heat sinks and exhausts
through the rear. If the heat sink gets too hot,
its sensing circuit will open the output relay,
disconnecting the load.
It is important to have an adequate air supply
at the front of the amplifier, and enough space
around the rear of the amplifier to allow the
cooling air to escape. If the unit is rack-mount-
ed, do not use doors or covers on the rear of
the rack; the exhaust air must flow without
restriction. If you are using racks with closed
backs, use fans on the rear rack panel to
ensure an ample air supply.
AC Power Requirements
The ESP4000 is an advanced power amplifier.
Understanding power distribution, voltage and
current requirements, as well as electrical safety
issues, is critical to the safe operation of the
ESP4000.
AC Power
The ESP4000 uses a pair of PowerCon 3-pole
AC main systems with locking connectors to
prevent accidental disconnection. The main AC
connectors (blue) serve as the power inputs.
The ESP4000 operates in either 115V, 230V or
250V modes. Although pre-configured at the
factory, the unit’s operating voltage mode can
be changed in the field.
Voltage Requirements
The ESP4000 operates safely and without
audio discontinuity if the AC voltage stays with-
in the operating window of 100V-130V in
115V mode, 200V-250V when working in
230V mode and 220-270V when working in
250V mode at 50 or 60Hz.
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 amplifier will shut
down if the voltage does not rise above the low
boundary before storage circuits are depleted.
How long the amplifier 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.
CAUTION
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