Figure 5.1 MT-BB Input Panel Accessory; 5 Advanced Features and Options; 5.2 Accessories- Page 14

Micro-Tech Series 

Power Amplifiers

page 14

Operation Manual

5.2  Accessories

5.2.1 Cooling Fan Options

Every Micro-Tech amplifier has a built-in high-
velocity fan that provides optimum cooling. 
Two optional replacement fan blades are avail-
able for special cooling requirments. Crown 
part C 6594-3 is a quieter, low-velocity fan 
blade that in many cases can provide adequate 
cooling. Crown part C 6593-5 is a reverse air 
flow fan blade which changes the direction of 
the air flow in and out of the amplifier (

not

  rec-

ommended for the Micro-Tech 2400). 

Important: The optional replacement fan 
blades should only be installed by a 
qualified technician

.

5.2.2 Input Connectors Option

The MT-BB is an accessory panel that 
provides barrier-block input connectors. 
An MT-BB accessory might be desirable 
in applications requiring bare wire con-
nections. It can also be used to daisy-
chain an input signal from one amplifier 
to another, just like the MT-XLR

The  MT-BB must be installed at an authorized 
service center or the Crown factory.

5.3 Filter Cleaning

A dust filter is provided on the air intake to the 
cooling system (Figure 4.1, letter “B”). If this 
filter becomes clogged, the unit will not cool as 
efficiently as it should and may produce lower-
than-normal output levels due to high heat-sink 
temperature.

To remove the filter, use a phillips screwdriver 
to remove the three screws that hold the front 
grille in place. Wash the filter with mild dish-
washing detergent and warm water. Be sure to 
dry the filter before installing it. Replacement 
filters may be ordered from the factory.

Dust filters are not 100% efficient. So, depend-
ing on the local environment, the internal heat 
sinks of the amplifier will benefit from periodic 
cleaning by a qualified technician. Internal 
cleaning information is available from our 
Technical Support Group.

5 Advanced Features 
and Options

Figure 5.1 MT-BB Input Panel Accessory