If mounted in a sealed rack, leave the top and bottom spaces open to create a
chimney effect within the rack, which will provide cooling as air is drawn in the
bottom and exhausted
out the top. The amount of airflow necessary will be determined by a number of
factors, including ambient temperature, the amount of heat generated by other
equipment in the rack, the properties of the enclosure being used, and how hard
the amplifier is working. In extreme cases it might be necessary to install a
cooling fan in the rack for additional cooling.
In free standing installations where the amplifier is sitting on a shelf or hard
floor the four rubber feet must remain mounted to the bottom of the amplifier.
Under no circumstances should the amplifier be placed directly on carpeting or
similar surfaces.
AC Power Considerations
Your Stewart Audio DA-70-2 and DA-70-4 amplifiers are designed to operate on
120 volt, 60 Hz AC current.
Your Stewart Audio DA-70-2-PFC and DA-70-4-PFC amplifiers are designed to
operate over a range of 90 volts - 240 volts, 50-60 Hz alternating current.
Average power consumption will depend on load impedance, signal level and
program material.
Typical power consumption in Amperes:
(All channels driven @ 4 Ohms /120V AC)
Model Idle 1/8 power 1/3 Power Full Power
DA-70-2 0.2 0.4 0.6 1.4
DA-70-4 0.3 0.7 1.3 3.0
DA-70-2-PFC 0.2 0.4 0.7 1.6
DA-70-4-PFC 0.3 0.8 1.4 3.2
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