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3 Operation
3.4 Front Panel Controls and Indicators
D. USB 2.0 Connector
Accepts a USB drive to transfer presets from the
Many of these functions can be disabled using
drive to the amplifier DSP, and vice versa.
Blackout Mode (a selection in the Advanced
E. Fault Indicator
Menu, Section 4.2.3).
Red LED, one per channel, flashes when the
A. Cooling Vents
ampli fier output channel has stopped operating.
Front-to-rear forced airflow through foam dust filter
Usually this means that the amplifier must be
serviced.
B. LCD Control Screen
Integrated LCD with white backlight, controls
F. Thermal Indicator
ampli fier setup and operation.
Red LED, one per channel, illuminates when the
channel has shut down due to thermal stress or
The LCD Control Screen and its controls let the user
overload.
adjust the amplifier's attenuation and muting,
con figure the amp, set up and view error monitoring
g. Clip Indicator
(such as temperature and load supervision), and
Red LED, one per channel, illuminates when the
recall DSP presets. The presets allow the user to
channel's output signal reaches the onset of audible
quickly reconfigure the amp for various applica tions.
clipping. The Clip Indicator also will illuminate
dur ing Thermal Level Control (TLC) limiting. The
C. Power Switch
Clip Indicator can be turned of during Blackout
Push-on/push-off switch glows green when AC
mode.
power is present at the power cord and the amplifier
circuit breaker is in the "on" position.
Figure 3.1 Front Panel Controls and Indicators
page 12
I-Tech HD Series Power Amplifiers
H. Level Controls (Encoders)
M. Ready Indicator
Speed-sensitive, 0.5 dB steps, range 0 to –100 dB.
Green LED, one per channel, illuminates when the
These two knobs affect the Channel-1 and
channel is initialized and ready to produce audio
Channel-2 output levels. They also select Menu
out put. Indicator is off when the channel is set to
items and adjust parameter values that are displayed
standby mode via System Architect or in Blackout
on the LCD control screen.
mode.
I. Menu/Exit Button
N. Power Indicator
"Menu" enters the main menu. "Exit" leaves the
Blue LED indicates amplifier has been turned on and
menu.
AC power is available. The LED will flash when the AC
line voltage is 15% above or below the nominal rated
J. Prev Button
range. This indicator can be turned off in Blackout
Selects the previous item in the menu.
mode.
K. Next Button
O. Data Indicator
Selects the next item in the menu.
Yellow LED indicates network data activity. Data
L. Signal Indicators
indicator flashes only when the amplifier is polled for
data, or is polled to see whether it is online. This
These can be disabled during Blackout mode. Three
indicator can be turned off in Blackout mode.
green LEDS per channel indicate the ampli fier's input
and output signal levels. From top to bot tom the
P
Bridge Mode Indicator
LEDs are
Yellow LED illuminates when the amplifier is set to
–10 dB: amplifier output is 10 dB below clipping.
Bridge-Mono mode.
–20 dB: amplifier output is 20 dB below clipping.
Signal: selected input signal is above –40 dBu.
Operation Manual
I-Tech HD Series Power Amplifiers
3 Operation
3.5 Back Panel Controls, Indica tors
These two connectors accept 2-pole or 4-pole
and Connectors
®
Speakon
connectors. See Figures 2.5 through
2.10 and Tables 1, 2 and 3 for connector wiring.
The top Speakon
®
connector is wired for both
A. Fans
channels so it can be used for bridge-mono
Provide front-to-back forced airflow for cooling.
wiring or for stereo wiring of two speakers to a
®
single Speakon
connector.
ANALOg INPUTS SECTION
E. Binding Post Output Jacks
B. Balanced Analog XLR Inputs
One pair per channel of high-current, 60A color-
A 3-pin female XLR connector for each channel.
coded binding posts. Accepts banana plugs,
wire or spade lugs.
C. Balanced Analog XLR Loop-Through
Outputs
F. Power Cord Connector
Two 3-pin male XLR output connectors are pro vided
Standard 20 amp IEC inlet. Voltage range is
(one per channel). The signal at these connectors is
indicated above IEC inlet.
paralleled with the input signal for feeding the input
signal to other amplifiers.
g. Reset Switch/Circuit Breaker
If the current draw of the amplifier exceeds safe
OUTPUTS SECTION
limits, this breaker automatically disconnects
®
D. 4-Pole Speakon
Output Connectors
the power supply from the AC mains. The switch
®
Two high-current, 50A Neutrik
®
Speakon
NL4MLP
resets the circuit breaker.
(mates with NL4FC and NL4), one per channel.
Class 2 output wiring required.
Figure 3.2 Back Panel Controls and Connectors
Operation Manual
M AES/EBU Digital Loop-through Output
H. MAC Address
Male XLR active/re-clocked AES/EBU digital loop-through.
This specific amplifier's network identifier that is burned into its
The signal at this connector duplicates the digital input
firmware.
signal for feeding the input signal to other amplifiers.
I. Preset Indicator
It is not recommended to loop through more than four
LED flashes to signal the number of the current preset if active.
amplifiers. If larger distribution of AES is needed, the use of
LED is green if the preset values have not been changed once
loaded. LED is yellow if the preset values have been changed
an AES distribution ampli fier is recommended.
since they were loaded.
NETWORKINg SECTION
J. Reset Button
N. Link/Act Indicator
To restore factory default settings: Press the Reset Button with a
Shows net work activity.The LINK ACT LED illuminates when
thin, non-conductive object, then turn on amplifier power, and
the network port is connected and flashes when network
continue to hold the reset button until the Preset light comes
activity is detected.
on green (approximately 16 seconds)..
O. Network Connector
K. Data Indicator
®
This EtherCon
Ethernet connector is for networking.
Flashes yellow only when the amplifier is polled for data, or is
Warning: Only connect to networks that remain inside the
polled to see whether it is online.
building.
DIgITAL INPUTS SECTION
P. Cond Indicator
Turns on if the amplifier is set to be the CobraNet conductor.
L. AES/EBU Digital Input
The CobraNet conductor is a CobraNet node that provides
This 3-pin female XLR connector accepts a dig ital signal in the
the master timing clock for the CobraNet digital audio
AES/EBU format.
transport network.
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