Stewart Audio AV25-2 NET+ - Manual (Page 9)

3.2.1 Indicators
The AV25-2 NET series has up to 4 rear panel LED indicators. The first
is the power indicator which will illuminate when power is supplied to
the amplifier. 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 final 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 amplified.
To fix 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-
fier from sleep when a signal is detected. After 5 minutes without an
input signal the amplifier will go into sleep mode.
The rear panel contains two individual channel volume knobs . The am-
plifier 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 flat-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+ amplifier includes selectable priority switching which
allows either the network or local input to override the other depending
on the configuration. The switch located on the rear of the amplifier
allows the operator to select the priority input. When audio is detected
on the priority input the amplifier 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
configuration 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 configure the bundles of the AV25-2 NET+?
A: Bundle settings should be configured 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 Configuration 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 .