Revox Voxnet 219 User manual

Introduction network receiver
1
Klk
4
D 1.0
OM V1.00
SW 80-0.7.0

Contents Voxnet 219
1
Welcome..............................................2
Commissioning ............................................ 3
Scope of delivery......................................... 3
Safety........................................................... 3
Fuse.............................................................. 3
General safety instructions......................... 4
Safety measures ......................................... 5
Regulations pertaining to the unit .............. 6
Rack installation.....................................7
Environmental conditions in the rack..8
Installation with wall-mounting
bracket ....................................................9
Front of the Voxnet 219 ............................. 10
Status LED.............................................10
Display ....................................................... 11
Connection panel ...................................... 13
Detailed description /Connection panel...... 14
IR Link ....................................................14
Network.................................................14
Trigger IN ..............................................14
Trigger OUT...........................................14
USB ..............................................14
Voxnet peripherals............................15
Multiroom example: Voxnet with 2 rooms
................................................................16
Voxnet Configurator .................................. 17
Technical data......................................19
I/O module..........................................20
Installing modules......................................20
Connections ...............................................21
Connection description....................... 21
Technical data ..................................... 22
Voxnet 218 keypad............................23
Cabling .................................................. 24
CAT cable cabling plans..................... 24
Parallel switching ................................ 24
Technical data ..................................... 25
Network terminology glossary ..26
DHCP .....................................................26
DNS .......................................................26
Ethernet network ................................. 26
Gateway................................................26
IP address............................................. 26
LAN........................................................27
MAC Address ....................................... 27
NAS .......................................................27
Power line – LAN ................................. 27
Proxy server ......................................... 27
Router (WLAN Router) ........................ 27
Server....................................................27
UPnP-AV ............................................... 28
http://www.gnu.org/software/gmedias
erver/VLAN ........................................... 28
Appendix............................................29
Warranty ....................................................29
Copyright ....................................................29
Environmental protection ..........................29

Voxnet 219 Safety
2
Welcome
Voxnet is an Ethernet-based multiuser /
multiroom audio system developed by
Revox with a new, unique operating
philosophy and an impressive audio
quality. This is characterised by
streaming at CD level quality and with
the smallest latency periods, so that
music can be heard in its purest form,
with practically no delay, in each room.
The hardware audiophile core of the
system is represented by the modular
Voxnet 219 stereo amplifier. Its powerful
2 x 50 watt outputs can even provide
enough power to drive column speakers.
The integrated DSP (Digital Signal
Processor) allows adjustments to be
made to handle all Revox speakers. You
just have to select the corresponding
Revox speaker in the Configurator list
and then define the positioning and/or
the installation method. This is all you
need to achieve the optimum in sound
quality for a clean reproduction. In
addition, a professional 8 band equaliser
(parameters: Q, Fc, Gain) allows you to
balance the system to meet your
personal preferences.
Traditional music sources, both
analogue and digital, can be connected
through the optional I/O module.
Needless to say, this is possible in HD
quality with data rates of up to 192
kHz/24 bit. In order to deliver even more
comfort, all inputs are equipped with
freely definable detector switching to
permit automatic switch-on, for example,
as soon as an audio signal is detected on
the corresponding input.
One of the Voxnet system's powerful
tools is the range of trigger options
available, that make it possible to control
the system in many ways externally,
using, for example, the five input
triggers: Infrared (RC5), Audio, Room,
Source and Voltage (IN). In the opposite
direction, other devices can be
controlled and/or addressed through the
output trigger (OUT / 12 VDC).
As well as the triggers, the Voxnet
system also offers proxy servers that can
be used to control devices outside the
Voxnet world, using IP commands.
Revox can supply corresponding 1 U
height shelves to accommodate 2 Voxnet
219s, for quick and secure installation in
a 19" rack (Article no.: 1.563.090.00). A
single bracket (Article no.: 1.563.091.00)
is also available for wall-mounting.
This product innovation from Revox
stands out as a true system for life,
thanks to its legendary robustness and
longevity, which the brand is known for
throughout the world.

Safety Voxnet 219
3
Commissioning
Please check the unit and accessories
after unpacking, to ensure that
everything is there and that there are no
signs of transit damage. Read the User
manual through carefully before starting
to use the unit. Keep the manual for later
reference. A unit that shows signs of
mechanical damage or which has had
liquid in it may not be connected to the
mains supply.
Only use the mains cable supplied. If a
different cable has to be used, it must
comply with the values 10A/125V. Any
alternative power cable used must have
corresponding certification
(UL/CSA/VDE).
The unit’s power supply and connections
values (mains voltage, frequency) must
be checked before connecting it to the
mains.
Use of switch-on current limiter
In the case of the installation of more
than 4Voxnet 219s per secured 16A
circuit, Revox recommends the use of a
switch-on current limiter.
This provides effective protection
against a mains circuit breaker being
tripped during switch-on following a
power outage or an overnight shutdown.
Scope of delivery
Voxnet 219 Room Amplifier (1x)
Power cable (1x)
Network cable (1x)
4 self-adhesive rubber feet
Safety
Take note of the label on the back of the
unit.
In order to avoid the risk of an electric
shock, do not open the housing.
Maintenance and repairs should only be
carried out by qualified experts.
Fuse
The Voxnet 219 does not have any fuses
that can be replaced by the user. The
special fuse in the power supply unit
may not be exchanged by the user.
In this case of a fault, please contact
your nearest Revox Service Point.

Voxnet 219 Safety
4
General safety instructions
Please follow the instructions in the
User manual supplied.
Do not position the unit close to strong
heat sources or in direct sunlight.
Please take note of the following, if the
Multiroom amplifier is to be installed in
a cabinet or closed shelves: Allow at
least 5 cm of free space around the
device, so that the air can circulate
freely and so that there is no build up
of heat. Do not cover openings on the
back or front walls of the unit.
It must be ensured that the correction
functioning of the unit's ventilation
openings is not affected by being
covered, e.g. by curtains, newspapers,
table cloths, or similar.
This unit conforms to protection class
2. This means that with this unit, the
ground cable is not connected to the
housing, in order to effectively
eliminate sound-damaging ground-
loops. With these Multiroom amplifiers
however, Revox uses the ground cable
for the reduction of noise fields. For
this reason, both the supplied cable
and the connection panel are fitted
with a ground cable.
Unplug the unit if you are going to be
absent for a longer period of time.
Unplug the unit from the mains during
storms. Voltage peaks through the
mains power supply caused by
lightning strikes can damage the unit.
There must be easy access to the
power plug so that the unit can be
unplugged at all times.
Lay the power cable such that it
cannot be damaged. The power cable
should not have kinks or by laid over
sharp edges. It should not be walked
on or be exposed to any chemicals.
The last point is valid for the whole
unit. A power cable with damaged
insulation can lead to electric shocks
and represents a fire hazard.
Never pull on the cable when plugging
the unit in or out. Always hold the plug.
Liquids, flammable or other objects
should not be inserted in the unit’s
openings as this can lead to faults, fire
or an electrical shock.
Do not expose the device to splash
water or high levels of humidity. Do
not stand containers filled with liquid,
e.g. flower vases, on the device.
It is only designed for operation in
temperate, non-tropical climates.
Take note of and follow the safety advice
on the following pages.

Safety Voxnet 219
5
Safety measures
Read and take note of the following
safety advice for your own safety and to
avoid unnecessary damage to your
equipment. Please keep this safety
advice in a safe place for future
reference.
Avoid locating the unit in a position
which:
- is exposed to direct sunlight
- is directly next to a source of heat
- has poor ventilation
- has a dusty atmosphere
- is unstable
- has high humidity
The guarantee covers intended usage of
the device.
High build-ups of dust and humidity
cause creepage current in the device
that can cause a risk of shocks when
touching the unit or lead to a fire.
If you have moved the unit from a cold to
a warm environment, leave it switched
off for about two hours because of a
possible build up of condensation
dampness.
You should always switch your Voxnet
219 off before connecting or
disconnecting other devices or
speakers.
Protect your unit from:
- Damp, dripping or splash water and steam
- Knocks and mechanical loads.
- Magnetic and electrical fields
- Cold, heat, direct rays of the sun and
severe changes of temperature
- Dust
- Interventions in the inside of the device
- Do not stand any articles with open
flames, e.g. lit candles on the unit.
Please note
In order to exclude the risk of an electric
shock, do not remove the housing. Only
have any repair work carried out by a
Revox specialist dealer.
Volume
Loud music can cause hearing damage.
Avoid extremes of volume, particularly
over longer periods of time.
Supervision
Do not allow children to handle the
equipment without supervision. Do not
allow children in close proximity to the
unit. Do not operate the Multiroom
amplifier without supervision. Unplug the
unit if you are going to be absent for a
longer period of time.
Cleaning
The unit should be cleaned using just a
damp, soft and clean cloth without any
abrasive cleaning agents.

Voxnet 219 Safety
6
Regulations pertaining to the unit
In EU and EEC countries, Revox offers a
guarantee on units bought in the EU,
over and above the statutory rights of
guarantee claims against the seller. The
guarantee covers material and labour
during the period of the guarantee,
which is defined by the Revox Sales
Partners in the individual countries that
make up the EU.
In all countries, the guarantee services
offered by the Revox Sales Agent are
over and above the statutory regulations.
They are only valid in the country of
purchase. Proof of purchase from an
authorised Revox Partner must be
produced to make a claim on the
guarantee.
The guarantee is made null and void in
the case of incorrect intervention
measures or non-professionally
executed repairs.

Operation Voxnet 219
7
Rack installation
The Voxnet 219 is designed for
installation in a 19" rack. A shelf / tray
(Revox Article no.: 1.563.090.00) is
available as an accessory, which can
take two Voxnet amplifiers. The height of
the shelf is 1 U.
The tray can be built into the rack with
and without Voxnet amplifiers. Both
options are possible depending on the
installation environment.
The Voxnet 219 has a recess to the left
and right of the front edge which the
metal lugs of the tray (upper picture / )
fit into. Locate the amplifier, lined up
with the right or the left of the tray and
push it backwards until it reaches the
back wall of the tray. The amplifier is
now fixed in place horizontally at the
front and vertically.
Now turn your attention to the rear of the
tray. Two knurled thumb screws are
provided with each amplifier for fixing it
into place (lower picture / ). Screw the
amplifier into place with these until they
are hand-tight.
This completes the installation of the
Voxnet 219.

Voxnet 219 Operation
8
Environmental conditions in the rack
In the case of a rack installation, you
must ensure that the inside temperature
of the rack does not exceed +40°C /
+104°F. If necessary, the rack must be
actively cooled using a fan.
The Voxnet amplifier itself is fitted with
an active fan control and controls its
own inner temperature. Cool air is
sucked in at the front of the amplifier,
drawn through the unit and blown out of
the slots at the back. For this reason,
cool air must be able to get to the front
of the amplifier to be drawn in, even if
the rack door is closed. Multiple trays
can be mounted underneath each other
in the rack, without having to leave any
gaps between them.
Stack of 8 Voxnet 219s
Use of switch-on current limiter
In the case of the installation of more
than 4Voxnet 219s per secured 16A
circuit, Revox recommends the use of a
switch-on current limiter.
This provides effective protection
against a mains circuit breaker being
tripped during switch-on following a
power outage or an overnight shutdown.

Operation Voxnet 219
9
Installation with wall-mounting bracket
An optional wall-mounting bracket is
available (Revox Article no.: 1.563.091.00),
which can take one Voxnet amplifier. In
this case, the Voxnet 219 connections
are directed downwards. The front panel
with the display is directed upwards.
The 4 x 30 mm pan head screws supplied
are used for mounting the bracket on the
wall, as shown in the assembly
instructions. Then, you can simply hang
the bracket on the screws.
It is advisable to complete the cabling of
the Voxnet 219 before mounting it on the
wall-mounted bracket as the
connections are very close to the wall.
The amplifier can now be placed on the
bracket. It must be ensured that the
Voxnet 219 lies flush against the bracket
and that its two lugs are located in the
recesses beneath the front of the Voxnet
219 (lower picture / ).
Finally, the two knurled thumb screws
(lower picture / ) are screwed into the
amplifier's locking threads and hand-
tightened.
The picture shows the positioning of the
Voxnet 219 (transparent) on the wall-
mounted bracket (dark in the
background).

Voxnet 219 Operation
10
Front of the Voxnet 219
Status LED
Name
Function
Info display Displays various operating data details. Called through the Setup button
Ventilation intake Do not cover the opening - required for fresh air intake
Monitor [socket] Headphone output - 3.5 mm, stereo jack
Power [LED] Operational state status display
Setup [button] For calling up various operational data in the info display [activate
bootloader]
Voxnet [LED] Voxnet system activity display
Power
Voxnet
Display
Function
Standby
Bootloader activate: [Press and hold the Setup button and
power up the Voxnet 219]
Voxnet 219 is switched on: IP not assigned or has been
subsequently separated from the network

Voxnet 219 active in the background: one or more inputs from
an optional module are in sensitive mode and/or are being
streamed from other amplifiers.
Voxnet 219 is switched on: IP is assigned

Operation Voxnet 219
11
Display
Various operational data can be called
up through the Setup button.
The Voxnet 219 is supplied with the current Voxnet server
firmware over the bootloader.
The Voxnet 219 starts up after the firmware has been 100%
updated. This state is shown briefly in the display.
After start-up, the Voxnet 219 receives its IP address from the
router via DHCP. This can take a few seconds.
When the unit is delivered, the
R
oom is displayed with the
corresponding MAC address from the Voxnet 219. The room
identifier is completed with a (0). After configuration through
the Voxnet Configurator, the display shows the assigned
"Room alias". A level display gives information about the
amplifier / output volume status.
As with the room, the
S
ource is defined as a combination
with the MAC address. The source identifier is competed
with a (0). After configuration through the Voxnet
Configurator, the display shows the assigned "Source alias".
A level display gives information about the input level of the
current source.
Source index:
CO
: coaxial
OP
: optical
AN
: analogue
The
T
rigger ([IN/OUT) is also defined as a combination with
the MAC address. The trigger is completed with an indexing
value. After configuration through the Voxnet Configurator,
the display shows the assigned "Trigger Alias". The status of
the IN and/or OUT trigger is shown in the bottom line of the
display.

Voxnet 219 Operation
12
You can read off through the infrared display which RC5 code
(address / command) was received last. A current RC5
reception is indicated by the display of [IR], shown in a light
colour here.
The version number shows the current firmware version of
the Voxnet 219.
If a module is installed in the Voxnet 219, its identity can be
determined through the display article number, here for
example, 1.563.080.00 from the I/O module.
The Voxnet 219's IP address that it received from the router
via DHCP is shown here.
Display of the Voxnet 219's own MAC address.
The Voxnet 219 switches itself off after the display loop is
completed assuming that no audio input has detected a
signal. Otherwise, the next time the Setup button is pressed,
the room identifier is displayed.

Operation Voxnet 219
13
Connection panel
Name
Function
AC Power
Power cable connection (class 1 with ground cable)
Please take note of the connection specifications: 100-240 VAC~ / 50-60 Hz /
140 W max.
[Retaining] M4 threaded hole for locking the unit in place on the rack-assembly shelf or
on the wall-mounted bracket.
[Blanking plate] Opening for the installation of optional Voxnet modules, e.g. I/O module
IR Link* Connection for Voxnet 218 wall-mounted keypad or various other Revox IR
receivers.
[Ventilation outlet] Do not cover the opening - required for expelling heated air
Network RJ45 socket for LAN cabling in the Voxnet network (100 Mbit)
R Speaker L Speaker connection / Impedance: at least 4 Ω
DSP correction profiles available for all Revox speakers in the Configurator
Trigger IN Voltage trigger input: 5 - 48 VAC/VDC. Potential-free. Ri: approx. 1000 Ω
Trigger OUT* Voltage trigger output 12 VDC (configurable)
[Rating plate] Unit-specific information
USB mini USB mini socket for uploading bootloader
* Max. overall current from IR Link and Trigger OUT: 80 mA

Voxnet 219 Operation
14
Detailed description /Connection panel
IR Link
Various Revox products can be
connected to the IR Link:
•Voxnet 218 wall-mounted keypad (I =
23mA)
•M204 IR Receiver (I = 7mA)
•M204 IR Receiver flange (I = 7mA)
•M204 IR Receiver aluminium housing (I =
7mA)
All products have one thing in common,
that they send and/or forward RC5
commands to the Voxnet 219. The Voxnet
218 is described in more detail in a
separate chapter in this manual.
If the Voxnet 219's Trigger OUT is not
being used, devices with an overall
current of up to 80 mA may be
connected to the IR Link. The individual
current requirements in [mA] are listed
above.
Please note that cables with small cross-
sections or long cable lengths can
impact both qualitatively and
quantitatively on the data signal to such
an extent, that it is no longer recognised
by the Voxnet 219.
Max, lengths: 100 m at ≥0.25mm² / cable
strand (≤AWG 23)
* Overall current
[IR-Link + Trigger Out): max. 80 mA
Network
Network connection to the Voxnet
network. This has to be separated from
other domestic networks physically or
through a VLAN. Minimum requirement:
100 Mbit; preferably a 1 Gbit network.
Trigger IN
Voltage-controlled input trigger (room
trigger) that is given its function through
the Voxnet Configurator. It can be used
both for the ON and the OFF state of
different actions.
Input voltage can be between 5 and 48
volts, DC or AC. The IN trigger applies a
load of approx 1000 Ωto the supplying
source.
Trigger OUT
The output trigger supplies 12 VDC. Its
function can be defined through the
Configurator or by using Voxnet text. The
OUT trigger can deliver an overall
current* of up to 80 mA, assuming that
the IR Link is not being used.
USB
USB mini connection for uploading the
Voxnet 219 bootloader as a fall-back
solution if the firmware should no longer
work correctly.

Operation Voxnet 219
15
Voxnet peripherals
The Voxnet 219 is a network-based
amplifier that is assigned its functionality
and its operating mode configuration
through the Revox Voxnet Configurator.
This is described in a separate operating
manual,
"Voxnet Configurator" .
The following hardware peripherals are
needed for the Voxnet system:
•DHCP router for the assignment of
IP addresses and for access to the
Internet for iRadio streams.
•Synology NAS, as specified by
Revox. Contains a Voxnet server
software in the DSM package
centre. This includes all Voxnet
services, the rights management
and the licence server. The
Synology NAS can be ordered from
Revox in a pre-configured state,
including the Voxnet server
software.
•Managed layer 2 switch (or higher)
with IGMP snooper functionality.
Revox has a list of recommended
switches to select from.
•Fixed-cabling 1 Gbit LAN - 100 Mbit
to the clients (Voxnet 219) is
sufficient.
•Separation of the Revox Voxnet
system in a VLAN or in a physically
separated network. In order to
ensure correct functioning, no
other clients, e.g. Smart TVs,
tablets, streaming products, etc.
should be present in the same
network. IP-controlled products
such as IP-serial converters or IP-
IP converters as offered by the
Global Caché company for
example, can of course be
operated in the Voxnet network.

Voxnet 219 Operation
16
Multiroom example: Voxnet with 2 rooms
Components in the Voxnet system
1.
DHCP router
2.
Layer 2 switch (managed)
3.
Synology NAS with Voxnet software
4.
Voxnet 219 amplifier with I/O
5.
Voxnet 218 wall-mounted keypad
6.
Revox M2014 IR receiver
7.
Revox speakers

Operation Voxnet 219
17
Voxnet Configurator
Revox offers a web-based GUI for the
configuration of the Voxnet system,
which can be called up through all
commonly used browsers such as
Firefox, Internet Explorer, Chrome etc.
This approach has the advantage that
the installer or system integrator has the
flexibility of choice and can use
platforms such as a Win-PC, Mac, iPad,
Android tablet or even in an emergency,
a Smartphone.
The Configurator communicates with the
Voxnet server that is located on the
Synology NAS. All configuration data
from the entire Voxnet system is stored
there.
Voxnet Configurator "General info"
Areas that affect the individual Voxnet
219 amplifiers are also stored locally
there.
All setup options are described in detail
in the separate "Voxnet Configurator"
and "Voxnet Text Protocol" operating
manuals. Here there follows just a small
glimpse into the options, in order to give
an overview of the new operation and
configuration philosophy of the Voxnet
system.
All the relevant settings for the Voxnet
system and its components are made in
the Configurator.

Voxnet 219 Operation
18
Alongside the simple selection menus
such as those for the definition of the
analogue output of a Voxnet 219, more
extensive settings are carried out in the
"Voxnet Text" programming language.
This greatly increases the level of
freedom of how the amplifier can
operate. You can decide, for example,
what should happen when a signal is
detected at the
Coaxial digital input. In
such a case, a traditional solution is that
the amplifier simply switches on
automatically and plays the signal
received over the
Coaxial input.
This would be achieved with the
following Voxnet text command in the
audio trigger: $r.peter:room:select:
$s.peter;$s.peter:play:coaxial
In the same way, it would also be
possible to switch on a television
through an external IP-RS232 converter
when a signal is identified, by using the
Voxnet IP Proxy. In such a case, the
following Voxnet text command would
have to be entered for the corresponding
audio trigger:
$p.sonytv:power_on (Voxnet IP-Proxy)
These two examples are just two
examples of the diversity of functions
offered by the Voxnet system.