Owner's manual

3.2.1 Indicators
The AV25-2 NET series has up to 4 rear panel LED indicators. The rst
is the power indicator which will illuminate when power is supplied to
the amplier. The second light is the signal present LED which will illu-
minate when signal is detected on either one of the input connection
channels. The nal 2 LED indicators (only on the NET+ models) are the
“Clip” indicators, one for each channel. These lights will indicate that
the input signal is too “hot” and will sound distorted when amplied.
To x this, the gain should be reduced at the preamp or mixer level.
3.2.2 Controls (NET+ Models Only)
All AV25-2 NET+ controls are located on the rear of the unit. There is
no power switch so the AV25-2 NET+ will turn on whenever power is
supplied to it. Signal Sense Technology (SST ) will power up the ampli-
er from sleep when a signal is detected. After 5 minutes without an
input signal the amplier will go into sleep mode.
The rear panel contains two individual channel volume knobs . The am-
plier is set to run off of a line-level source and the level should be ad-
justed for optimum performance. To adjust this knob, you will need a
small at-head screwdriver. While a typical program source level is
present, spin the rotary knob as far clockwise as you can without hear-
ing distortion or without the “Clip” indicator illuminating. If the signal is
distorting and the knob is all the way counter-clockwise, adjust the gain
down at the source level.
3.2.3 Signal Priority Switching (NET+ Models Only)
The AV25-2 NET+ amplier includes selectable priority switching which
allows either the network or local input to override the other depending
on the conguration. The switch located on the rear of the amplier
allows the operator to select the priority input. When audio is detected
on the priority input the amplier will cut the signal from the secondary
input. An example scenario is in a paging situation where a network
signal would override a local audio input.
3.3 CobraNet
3.3.1 CobraNet FAQ
Q: How do CobraNet devices communicate on the network? Do they
receive an IP address?
A: CobraNet devices operate without the need for an IP address. Many
conguration applications for CobraNet devices will assign an IP ad-
dress for organizational purposes. However, CobraNet devices operate
using data channels called “bundles”. In order to connect a transmitter
and a receiver in a CobraNet network, both devices simply need to be
set to the same bundle number. There is no need for a DHCP server (a
router for example).
Q: How do I congure the bundles of the AV25-2 NET+?
A: Bundle settings should be congured using Cirrus Logic’s CobraNet
Discovery Utility. Instructions for downloading and operation can be
found in section 3.3.2.
Q: Why is the CobraNet Discovery Utility not detecting any devices?
A: First, ensure that your computer has an IP address. If you are operat-
ing without a DHCP server (ie in a switch-only network) then you will
need to manually set an IP address in the Network Conguration sec-
tion of Windows. Next, go to Tools > Options in the top menu and
make sure the proper network device is selected in the top dropdown.
Q: Can the AV25-2 NET+ transmit the input channels to other CobraNet
devices?
A: No, the AV25-2 NET+ is designed only to receive audio .