Crown I-T9000 HD, Operation Manual

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I-Tech HD Series Power Amplifiers I-Tech HD Series Power Amplifiers
page 32 page 33 Operation Manual Operation Manual
I-Tech 12000HD AC Current Draw and Thermal Dissipation:
Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Data based on both channels driven.
Line Current
120VAC
Watts Out
Per 1A
Amp Line
Current
Line Current
208VAC
Watts Out
Per 1A
Amp Line
Current
Line Current
230VAC
Watts Out
Per 1A
Amp Line
Current
Btu/hr
kcal/h
r
Idle (sleep mode)
0.9
1.1
1.0
62
212
18
3
Idle (awake)
2.0
1.8
1.6
213
726
62
5
1/8th Power Pink Noise
8 Ohms/Ch.
Typical of program material
16 Ohms Bridge
just at clip.
4 Ohms/Ch. 8 Ohms Bridge 2 Ohms/Ch. 4 Ohms Bridge
1/3rd Power Pink Noise
8 Ohms/Ch.
Typical of program material
16 Ohms Bridge
with severe clipping.
4 Ohms/Ch. 8 Ohms Bridge 2 Ohms/Ch. 4 Ohms Bridge
441
1504
379
8.3
63.6
103.3
5.1
4.7
14.6
68.8
2394
603
14.2
764
2607
657
8.7
18.1
715
2439
615
144.2
701
1370
4677
117
9
1589
5425
136
8
118.0
131.1
17.9
8.2
33.9 35.1
11.0 20.8 19.9
9.9
18.7
62.9 77.4 76.3 69.2
128.3 128.6 115.2 106.1
8.0 7.7
111.8 124.5 113.6
230VAC
142.0
Watts
Dissapite
d
Thermal Dissipatio
n
I-T12000HD
Load
120VAC
208VAC
Protection System
Your Crown amplifier provides extensive pro tection and diagnostic capabilities, including thermal level control,
fault indicators, high-pass filtering, DC protect, AC under/over volt age protection, inrush limiting, and variable-
speed fans with tachometer feedback. Microprocessor monitors fans, and signals an error via System Architect if
fans are not operating.
Thermal Level Control (TLC)
If the amplifier becomes too hot for safe opera tion, the TLC will engage the input compressor and the clip LED will
illuminate. By compress ing the input, the amplifier will not generate as much heat and will have a chance to cool
down. The degree of compression is proportional to the amount of overheating. This feature allows the show to go
on, rather than having the amplifier shut down, and only occurs in extreme situations.
Circuit Breaker
If the current draw of the amplifier exceeds safe limits, this breaker automatically disconnects the power supply
from the AC mains.
Advanced Featured
Global Switching Power Supply with PFC
Thanks to its global power supply, the I-Tech amplifier works anywhere in the world. There’s no need to reset an
AC mains voltage switch, and no need to order a special model. The amp will work and meet all specs on 100V -
240VAC, 50/60 Hz.
Crown’s Switching Power Supply minimizes the amplifier’s weight.
Typical non-switching power supplies require large, heavy transformers in order to produce the required power at
the output stage. These transformers must be large to operate at 50 to 60 Hz (standard AC supplied by the power
company).
By contrast, switching power supplies can operate with a much smaller (and lighter) trans former because they first
convert the AC up to a much higher frequency, thereby reducing waste.
Power Factor Correction (PFC) controls how your amplifier draws current from the AC mains. Instead of drawing
high-magnitude cur rent spikes that reduce the capacity of your power distro (and couple noise into other sys tem
components), PFC draws a smooth and quiet current waveform that is in phase with the mains voltage waveform.
PFC allows you to reduce the size and weight of your power distri bution and improve the performance of your
signal processors.
Color-Coded Overlay
The labels on the rear panel are color coded to group similar functions under common colors.