Network Structure; Audio-Over-Ip Network - Genelec 4435A Operating Manual

For 4435A loudspeaker, calculate the output
power for each output as 15 W for PoE and
30 W for PoE+. Ensure that the total power
does not exceed the switch or power injector
total power.
Example: IP switch total power is 150
W. You use PoE+ and four outputs are
connected. The total output power is 4 x 30
W = 120 W. This is smaller than the capacity
of the IP switch, 150 W. This scenario is
acceptable.
PoE cable loss calculation
There is power loss in the Ethernet cable.
The reason for the power loss is that the CAT
cable conductor is thin and has considerable
resistance. The power loss increases with
increasing cable length. The maximum cable
length is 100 meters (333 feet). Calculate
the power loss in cable at 25 mW/m or 7.4
mW/ft. The 4435A will automatically adapt to
the power loss in the cable, but lower input
power will affect slightly the duration of the
maximum SPL output. In order to minimize
the cable loss and to maximize the duration
at maximum SPL, consider using power
injectors close to the loudspeakers or short
cable runs.
Selection of IP switch
Smart IP and 4435A are fully compatible with
standard Ethernet and IP switch technology.
Genelec recommends using gigabit speed
managed IP switches with full PoE+ on
each of the outputs intended for 4435A
loudspeakers. Managed IP switches offer
the ability to configure, manage and monitor
the local area network, typically using a web
browser user interface, and this helps in
creating a well working system.
The IP switches should support Quality
of Service (QoS) and be media ready.
Differentiated services (DiffServ) typically
implements QoS prioritization of IP traffic.
DiffServ marks IP packets according priority.
In response, IP switches can prioritize media
traffic to improve system performance.
Differentiated services code point (DSCP)
markings in the IP packet headers are
sensed by the QoS capable IP switch.
Genelec does not endorse certain IP
switch brands as Smart IP works perfectly
with all high-quality standard IP switches
with these capabilities. Use of 100 Mbps IP
switches is discouraged.
Name Standard
PoE IEEE 802.3af-2003
PoE+ IEEE 802.3at-2009
Table 1. PoE and PoE+ power levels.
Medium
peak level
Time profile of
PoE power
availability
PoE+
PoE
Figure 6. 4435A power supply enables high output level peaks exceeding the incoming
PoE power level; the PoE standard limits the duration of the peaks

Network structure

Genelec recommends always designing a
network structure with star topology. Only
one IP device (for example, one 4435A)
should be connected at one port in an IP
switch. IP device ports should not be daisy
chained to several IP devices.
Audio-over-IP requires the use of
cable-based LAN network. Low-latency
uncompressed audio-over-IP streaming
does not work over WLAN.

Audio-over-IP network

Audio-over-IP streaming supports unlimited
number of channels in the playback system.
These audio channels are automatically
synchronized perfectly in time by the audio-
over-IP streaming technology, forming a
single playback system. The 4435A accepts
AES67 and Dante audio-over-IP streams.
The streams are set up with Dante Controller
or Dante Domain Manager software. Each
4435A supports reproduction of one or the
sum of two audio audio channels in the
stream. The stream audio sample rate can
range 32-96 kHz, with 16-24 bit resolution.
The 4435A contains one interface for
standard Ethernet IP network connectivity.
The network interface speed is 100 Mbps.
The interface also allows Genelec's Smart
IP Manager software to work on the 4435A.
Power at switch Min. power at 4435AA
15 W 13 W
30 W 26 W
High peak
level
PoE+
PoE
Time profile of
audio power
usage
This software is available for AV installers
at Genelec web site and runs on Windows
10 or Windows 11 computers. The
software allows AV installers to configure
an almost unlimited number of rooms,
zones, loudspeakers and audio channels,
and includes device discovery, a versatile
room acoustic equalisation tool set, system
organisation and status monitoring.
The 4435A contains an application
programming interface (API) supporting
control via third-party hardware, software
or house automation. The API enables
integration to all house and home automation
systems. Detailed information about the API
are provided in a separate document from
Genelec.
A balanced line input is available on 4435A
besides the IP interface. The balanced line
analogue audio input can be configured with
Genelec Smart IP Manager software.
Setting up audio streams
The 4435A can be set to receive one audio
channel or a sum of two audio channels in
a stream. In addition, using the Smart IP
Manager software, 4435A can be set to also
sum in the analog input signal as well. Audio
stream setup is done by using Dante Controller
software. Download the software from https://
www.audinate.com/products/software/dante-
controller. Dante automatically divides a