Technical information

Page 8
Micro-Tech 600/1200/2400 Power Amplifiers
Reference Manual
Fig. 2.1 Front Facilities
2 Facilities
A. Filter Grille
This metal grille supports and protects the dust filter (B).
To clean the dust filter, detach the grille by removing the
three screws that hold it in place.
B. Dust Filter
The dust filter removes large particles from the air drawn
by the cooling fan. Check the filter regularly to prevent
clogging (see Sections 3.2 and 4.5).
C. ODEP Indicators
During normal operation of the Output Device Emula-
tion Protection circuitry, these amber indicators glow
brightly to show that reserve thermodynamic energy is
present. They dim proportionally as energy reserves
decrease. In the rare event that energy reserves are de-
pleted, the ODEP indicators turn off and the protection
circuitry proportionally limits output drive so the ampli-
fier can safely continue operating even under severe
conditions. These indicators also help identify more un-
usual operating conditions (see Section 4.2).
D. Enable Indicator
This indicator lights when the amplifier has been turned
on, AC power is available and the low-voltage power
supply and fan are operational (see Section 4.2).
E. Power Switch
This rocker switch is used to turn the amplifier on and
off. When turned on, the output is muted for approxi-
mately four seconds to protect your system from start-
up transients. (To change the start-up delay time,
contact Crown’s Technical Support Group.)
F. Power Cord
All units are shipped with an appropriate plug and cord
for the required AC voltage (see Figure 3.16). Also, refer
to Section 7 for power usage information.
G. Stereo/Mono Modes Switch
The three operating modes of a Micro-Tech amplifier are
controlled by this three-way switch. Stereo mode is used
for normal two-channel operation, Bridge-Mono mode
is used to drive a single channel with a load impedance
of at least 4 ohms, and Parallel-Mono mode is used to
drive a single channel with a load impedance less than
4 ohms. Important: Turn off the amplifier before
changing the stereo/mono modes switch (see Sec-
tion 3.3).