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Operation Manual
I-Tech HD Series Power Amplifi ers
page 26
4.6 Digital Audio Options (AES/EBU)
Digital audio inputs allow you to keep the amplifi er input signals
in the digital domain. Keeping the input signal digital reduces the
number of Dig ital-to-Analog and Analog-to-Digital conversions.
This provides better sound quality and reduces pickup of
electrical interference.
The AES/EBU connector provides the most widely accepted
format. Con nect an AES/EBU signal to the AES/EBU connector on
the rear panel. If the amplifi er’s low-voltage power supply is lost
for any reason, the AES input signal goes directly to the AES
output. The amplifi er has a digital buffer converter so it will adapt
to any AES sample rate between 32 and 96kHz that is sent to it.
4.7 Networking the Amplifi er
If you need help understanding network concepts, please see
Appendix A on Network and CobraNet Basics. Please check the
System Architect help fi le for directions on how to use its
networking confi guration tools.
An I-Tech HD amplifi er may be used in an existing I-Tech network
and can use existing I-Tech device or venue fi les.
You can make the following settings via the front panel or by
using the Network Troubleshooter:
HiQnet node address
DHCP off/on
IP address
Subnet mask
You cannot set the CobraNet IP address via the front panel.
4.7.1 Network Troubleshooter
The network troubleshooter can assist you in setting up your
HiQnet network for the fi rst time. Using the troubleshooter, you
can address your components and be informed of addressing and
other errors in the system. Please note that this wizard is designed
to work with devices that are on the same physical network
segment as the computer it is running on. It will not work through
a router.
Select Network Card
The fi rst page of the wizard lists all the network adapters currently
in the computer. If you have more than one adapter, you can scroll
through the list and see the IP Address assigned to each card.
If you have a card with an IP address of 0.0.0.0, it typically means
one of several things:
1. The card is disabled.
2. The card is not connected to a network.
3. The card is setup to obtain its address from a DHCP server, and
no DHCP server is available.
Select the card that is connected to the HiQnet system and click
the Next button. The Wizard will walk you through the rest of the
process. Please see the System Architect online help for more
information.
4.8 Software-Controllable Onboard DSP
Crown’s latest-generation Digital Signal Processing is built into
the I-Tech HD amplifi er. Its 24-bit/96kHz converters offer
extremely low noise and extended dynamic range. When you use
an I-Tech HD amp, the loud speaker processors, crossovers,
limiters and delays are in the onboard DSP – so you don’t need
those rack-mounted devices. This drastically cuts setup time,
commissioning, rack space and costs.
The I-Tech HD’s DSP can be monitored and controlled with a
computer running System Architect software, and connected to
the amplifi er Network Connector by a network Category 5 cable.
Some applications for this DSP are:
• Set up signal fl ow
• Optimize system gain structure
• Set up speaker confi gurations (set the drive levels, frequency
bands, delays and limiting for your particular speakers)
• Set up EQ, fi ltering, compression, and much more.
The next several pages explain some of the available DSP
functions. See the System Architect Help fi les for more detailed
information.
4 Advanced Operation