Thermal Considerations; Ac Power Considerations; Magnetic Leakage Considerations - Bose 2150 Installer's Manual

3.0 Using The Amplifiers

3.4 Thermal considerations

When the amplifier is used freestanding, no thermal considerations are necessary other
than keeping sufficient ventilation around the unit.
Bose Model 2150 amplifiers may be stacked directly on top of each other without spacer
®
panels. If a Model 2150 amplifier is used with other amplifiers, be sure the heat output from
the amplifier does not interfere with the adequate ventilation of the others.
If the unit is rack mounted, allow for adequate ventilation exits in front of and behind the
amplifier. When several amplifiers are mounted together in a rack, you may need to provide
air inlets and a fan from the outside of the rack.
CAUTION: Do not allow the chassis to exceed the maximum operating temperature of
50˚ C. Be aware of conditions in an enclosed rack that may increase the temperature
above room ambient conditions.

3.5 AC power considerations

Be sure to plug your amplifier into an outlet capable of supplying the correct voltage
specified for your model. Check to be sure the circuit can provide enough current to allow
full-power operation of all the amplifiers in your system.
The power plug serves as the main disconnect device and should always be easily acces-
sible after installation.
The current demand of a power amplifier varies depending on the impedance of the load,
the output level of the amplifier, and the crest factor and duty cycle of the program material.
For example, consider typical conditions during rock music reproduction, with both chan-
nels driven into 4 ohms until musical peaks are just below clipping. Under these conditions,
the Bose Model 2150 amplifier requires an average of 4.2 amps for 120V versions (2.2
amps for 220-240V versions).

3.6 Magnetic leakage considerations

You can mount the Model 2150 amplifier without concern for magnetic flux leakage.
However, it is not a good idea to mount any power amplifier near a microphone input
transformer or magnetic storage media.
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AM264080_00_V.pdf • June 21, 2002