Crown Audio IQ-MCA-IQ-MC8 - Manual (Page 13)

Page 13 Reference Manual
IQ-MC Modules
-To clear all memory and set to
factory default presets:
Remove all input signals. Press in and
hold the switch while applying power
to the unit. The settings will be reset to
factory default, with the firmware re-
writing to EEPROM memory. Impor-
tant: This action will re-write the
memory and erase stored presets.
With the button held in and power
applied, the DATA and PRESET indi-
cators will both be lit. When the button
is released, the DATA and PRESET
indicators will alternately blink for a
few moments, indicating that memory
is being written, then the DATA indi-
cator will flash for a moment. After the
unit has been reset to the factory
default settings.
4.3 Amplifier Control and
Monitoring
The following IQ-MC module fea-
tures are accessed via IQ for Win-
dows software.
4.3.1 User Presets
The parameters for all functions can
be saved as presets. A total of 10 user
presets can be stored in the IQ-MC
EEPROM memory. Preset names are
stored on the module.
4.3.2 Clip Monitor
The Clip indicator of each channel of
the amplifier can be monitored by the
IQ System. The IQ-MC module can
cause a warning to flash on your com-
puter screen via IQ for Windows soft-
ware indicating a Clip event, Also, it
can report Clip events to it’s AUX port.
4.3.3 Input Signal Level
Monitor
The input signal level of each channel
can be monitored. This monitor fea-
ture has a range from +20 dBu to –40
dBu in ½-dB steps.
4.3.4 Output Signal Level
Monitor
The output signal level of each chan-
nel of the amplifier can be monitored.
This monitor feature has a range from
0 dB to –40 dB where 0 dB is refer-
enced to the rated output voltage of
the amplifier model.*
The IQ-MC module features scaled
output level meters. By factory de-
fault, the meters are calibrated such
that 0 dB equals the amplifier’s rated
output into 8 ohms. In 70V/100V mode,
the meters default to 0 dB equals 70/
100 Vrms. Auto-scaling is handled by
the software.
4.3.5 Thermal Headroom
Level Monitor
The Thermal Headroom level** of each
channel of the amplifier can be moni-
tored by the IQ software. This level
represents the percent of available
power/thermal capacity that is cur-
rently being used within the output
section of the amplifier.
When the thermal headroom level
reaches 100%, the amplifier cannot
produce any more power and it will
begin to limit the drive level to the
output devices to protect them from
too much stress***. The Thermal Lim-
iter feature of the IQ-MC module can
be set to engage upon a pre-selected
thermal level. (See Section 4.3.14)
* This is assumed to be 70V or the rated
8-ohm output.
** Thermal Headroom on your Crown am-
plifier may be labeled Junction Tempera-
ture Simulation (JTS).
*** See the amplifier’s Reference or Owner’s
Manual for more information about JTS
and how it works.