SP2400 – 15
AC Power Considerations
Each SP2400 draws an average of 6 amps of AC
line current (@ 120VAC) when fully loaded and
playing music with a relatively high crest factor.
Voltage Conversion
The SP2400 can be configured to operate at
115V AC or 230V AC. See Appendix C for instructions
on how to change the operating voltage configuration.
Thermal Considerations
IMPORTANT:
The SP2400 is convection
cooled rather than fan cooled. This design
was chosen to avoid the requirement for
periodic air filter maintenance, and to keep the
insides of the SP2400 clean in dirty environments
(rather than blowing dirty, smoky air into it). Heat is
drawn away from the amplifiers by the heatsinks
and radiated through the cooling vents in the top
cover. When installing the SP2400, be sure to allow
sufficient air space around the top and rear of the
amplifier to allow adequate cooling for the
heatsinks. If installing in a rack,
leave at least one
rack space above and below the SP2400 for a vent,
and at least 6 inches behind the chassis to allow
proper ventilation.
If installing three or more SP2400s in a rack, use a
fan in the rack to move cool air in and warm air out of
the rack's enclosure. It may be necessary to provide
a cool air intake fan at the bottom of the rack, and a
warm air exhaust fan at the top (see Figure below).
Note:
Though it is not required, it is
recommended that a warm air exhaust fan be used
when two SP2400s are installed in the same rack.
If the amplifier should overheat, a thermal switch
is activated that disengages the speaker outputs,
allowing the heatsinks to cool down. The
OVERLOAD
indicator on the front panel will also
light to show that a protection circuit has been
activated. Once the amplifier has cooled to a safe
operating temperature, the thermal switch resets
and reactivates the speaker outputs. If this should
occur, identify the cause of the problem and take
corrective action (i.e., provide better ventilation,
install a fan in the rack to move more air, make sure
the amplifier is not overloaded with too low of a
load impedance).
1U Vent Panel
1U Vent Panel
2U Vent Panel
(or Optional Intake Fan)
2U Exhaust Fan Panel
Cool Air
Intake
Cool Air
Intake
Cool Air
Intake
Cool Air
Intake
Cool Air
Intake
Hot Air
Exhaust
