Void Bias D1 User Manual - page 6
Pilot Tone monitoring
The detection of a mismatch in the input pilot tone parameters
(frequency and voltage level) can be used to trigger the backup
policy and activate an alert through the general purpose output
switch.
The output pilot tone detection relies on an external signal passing
through the amplifier or the internal post DSP pilot tone generator;
in both cases any mismatch between the detected signal and the set
thresholds triggers the general purpose output switches.
IP Addressing
Factory default network settings are DHCP/AutoIP.
In order for the amplifier to self-configure when connected to
an existing LAN or PC. Fixed IP policy can also be adopted and
configured through Armonía Pro Audio Suite.
If a DHCP server is not active within the network, the amplifier
platform initiates a stateless address auto-configuration (i.e.
Zero-configuration networking methodology – Zeroconf): it self
assigns a local numeric network address (of the type 169.254.x.y –
172.31.*.* for the secondary network if present – with a subnet mask
255.255.0.0) and automatically distributes and resolves the host
names of the networking devices.
Both Armonia and the Bias D1/Q2 must belong to the same subnet.
If a DHCP server is present on the network and a Bias D1/Q2
amplifier is in AUTO IP, networking may become unstable.
As a rule of thumb, turn the DHCP
server on before connecting the amplifiers.
IP addressing of a Bias D1/Q2 amplifier is established during the
bootstrap: when the amplifier discovers a DHCP server on the network
during the startup, it negotiates the networking parameters. If the Bias
D1/Q2 does not reveal a DHCP server on the network during the
startup, it set itself in AUTO IP mode.
Networking
Bias D1/Q2 amplifiers support star network topology via the Ethernet
port and Dante
TM
networking via the Dante
TM
port.
Input selection and Backup Policy
In Bias D1/Q2 DSP+D amplifiers it is possible to select among two input
signal sources per channel: analog and Dante
TM
streams. Armonía Pro
Audio Suite software provides an interface to select the input source.
Furthermore Bias D1/Q2 DSP+D amplifiers implement a backup
policy aimed to improve reliability against signal fault. By assigning
a bus priority to the two different input sources per channel, the
system is able to automatically switch to a reliable input connection
in case of signal drop or pilot tone mismatch.
Output Load monitoring
Through the Armonía Pro Audio Suite software it is possible to set the
thresholds on the load impedance, at given frequency, that trigger
the general purpose output of any channel in Bias D1/Q2 DSP+D
amplifiers.
Armonía Pro Audio Suite
Armonía Pro Audio Suite is the default configuring interface that allows
system setting and customization of the Bias D1/Q2 DSP+D amplifiers.
Armonía can be installed on a PC running Windows (XP SP3 and higher).
Download Armonía Pro Audio Suite for free from the dedicated website:
http://www.voidacoustics.com/void_uploads/Armonia.zip
Bias D1/Q2 amplifiers are optimized for working with 4
Ω output
loads but a special configuration allows to connect low loads down
to 2
Ω.
The 2
Ω switch allows to activate on all output channels set to match
low impedance (i.e. in Lo-Z configuration) an operating condition
that optimizes the performance with very low loads, by limiting the
maximum output voltage to 85 V
peak
per channel.
For optimal 2
Ω performance, it is recommended to select LowZ
mode for all the amplifier’s channels.
Note that 2
Ω capabilities are not supported by 4804 models, the dip
switch is therefore marked “USR C”, and its function is reserved.
Lo-Z 2
Ω load operation
Any channel of can drive 70V/100V (Hi-Z) distributed line
loudspeakers. In order to connect any channel’s output to a
70V/100V line, the rear panel DIP switch corresponding to the
channel must be set.
Void recommends to use the built-in HPF (High Pass Filter) when
the amplifier is set to drive a distributed line to prevent loudspeaker
transformer saturation, which can considerably degrade sound
performance. The HPF can be activated by means of the DIP switch
corresponding to the channel, two cutting frequency are available 35
Hz and 70 Hz.
Hi-Z 70V/100V operations
Output connections are made via the Phoenix PC 5/4-STF1-7,62
177859 port.
Any mixed configuration of low and high impedance output loads
can be made: in order to set the load configuration, each channel is
provided with four DIP switches.
Output connections
The port labelled Ethernet is designed to remotely control the
amplifier via an Ethernet connection through a personal computer
and Powersoft Armonía Pro Audio Suite software.
Void recommend the use of Ethernet Cat5 straight through – patch
– cables with pin/pair assignments TIA/EIA-568-B, i.e. T568B.
Ethernet connection
The self check procedure tests the amplifier status and reports the
user in case of failures.
After few minutes, at the end of the self check procedure, a
combination of lit LED in the LED panel provides information about
the amplifier status.
In order to exit the self check test and resume normal operations,
press once the self check push button
6
.
If self check cannot be started because of a fault, the check LED
will blink fast, whilst a reassuring slow blink is an indication of a
completed self check procedure.
Self Check
Bias D1/Q2 provides a pair of paralleled general purpose output
connections per channel: one Normally Open NO and one
Normally Closed NC.
The connections are available on the back panel via the 6-pin
Phoenix MC 1.5/6-ST-3.81 5447900 connector.
These contacts are used to report potentially dangerous faults or
generally unsafe operation conditions by toggling alarm switches
relative to the following events, and any fault preventing the normal
operation of an output channel:
No AC mains (i.e. system shutdown);
Thermal stress: the system temperature is too high and the thermal
protection is engaged;
Short circuit in output wiring: either the loudspeaker or the line is in
short;
Amplifier is in Standby
DSP+D versions feature further monitoring on pilot tone and output
load trough Armonía Pro Audio Suite.
Diagnostics - GPO - Alarms
Dante
TM
enabled models accepts two input streams from the
Dante
TM
connection through the Dante
TM
port. Cabling must comply
to TIA/EIA-568-B and adopt the T568B scheme pinout.
In order to implement a Dante
TM
network, a computer running
Dante
TM
Controller have to be used. Dante
TM
Controller is a software
application that manages devices on the network. Bias D1/Q2
DSP+D amplifiers are automatically discovered and displayed in
Dante
TM
Controller with the default identifier:
MODELNAME-SERIAL
(e.g. BiasD1-71520).
Digital Audio Input connection