Skip to main content
Chat with Biamp tech support
Biamp Cornerstone

Voltera D Chassis and Hardware Functions

This page describes the various hardware functions of the Voltera D Loudspeaker Controllers. It covers the front and rear panel controls, wiring connections with which a user may need to interact, and detail related to filter cleaning maintenance.



Voltera D models

The Voltera D series of Amplified Loudspeaker Controllers (ALCs) includes 4 models. Each can be configured as part of either a Biamp Tesira system, using Tesira Software, or in non-Tesira applications, using Biamp's VenueTune software. 



Per Channel

(Symmetrical Power) W 

Per Channel

(Asymmetrical Power) W 


Power W 


D 1200.4

​300 W 

900 W (3x)

1200 W​ 


D 2400.4 


600 W​ 

1800 W (3x)

2400​ W 


D 1200.8


150​ W 

600 W (4x)

1200​ W 


D 2400.8 

300​ W 

1200 W (4x)

2400​ W 





Front panel

The Voltera D front panel primarily provides feedback on the current operating state of the loudspeaker controller via LED indicators. This tamper proof design helps ensure all configurations are managed from the appropriate software and can protect against unintentional interruptions or changes. 

Front Panel 2400_4.png

Front panel buttons


Locate can be used to bring attention to a device by flashing green LEDs on the front panel. Voltera D uses Biamp's Visual Locate function.

When activated via the chassis front panel, or software, the Visual Locate feature will trigger the front panel LED ladder (alarm / activity / status / ais) to flash for assistance in locating the selected chassis in a rack. Visible Locate can be deactivated either via software, or front panel. 

Front panel LEDs

The Voltera D loudspeaker controllers include front panel LEDs to provide feedback on device status. Front panel LED activity descriptions for all Tesira devices can also be found in the Tesira Help File. Voltera D can also be referenced in the VenueTune Help File.

Device Status 

LED Off Green Yellow Red
Power No mains or PoE power Device is on with mains power Device is in standby mode Device is on with PoE power only
Alarm No fault is reported in this device (when device is powered) -- Minor fault is reported in this device Major fault is reported in this device
Activity -- Device is active and properly configured and audio has been started -- Audio is stopped on a configured device or the device is not configured
Status -- Device is configured and is part of a system or ready to participate in a system Device is not configured but is ready to receive a configuration Device not ready to receive a configuration
AIS (Alarm In System)* No fault is active in any device in the system (when device is powered) -- Minor fault is active in a device in the system

Major fault is active in a device in the system

Channel State 

LED Off Green Yellow Red
Temp Temp < 70% 
(Fan speed low) 
-- Temperature 70% to < 90% 
(Fan speed medium) 
Temperature 90%  to 100% 
(Fan speed max )
Limit Channel is within safe limits  -- Low Limit Level (-3dB to -6dB)  High level limit (<-6dB) or Clip / Protection 
Signal No signal present  Signal level between 
-60dBFS and -6dBFS 
Signal level within -6dBFS and - 1dBFS.   Signal within 1dB of maximum level (-1dBFS) 
Mute Not muted -- -- Channel mute is active.

Filter and cooling

Air is ducted from front to rear of the Voltera D chassis. There is a user serviceable air filter that should be considered as part of regular maintenance. Note, that the air filter cleaning schedule will be dependent on site installation conditions. A tool-less design allows for easy access and removal of the filter.

VD Filter 1.png

  1. Remove the grill by pressing on the side that includes the amplifier model text.

VD Filter 2.png

  1. The left side of the grill will lift away from the main chassis.

VD filter 3.png

  1. Remove the grille from the Voltera D.

VD Filter 4.png

  1. Use a dry cloth to clean the chassis and front panel
  2. Use compressed air to remove dust from the filter, or wash with clean water. If water is used, let the filter dry completely before reinstalling.

VD Filter 5.png

  1. Carefully return the grille to the front of the device using the magnetic snap points.

Replacement filters can be ordered using Biamp part number 999.1558.90A.

Rear panel

rear panel 4 channel.png

rear panel 8 channel.png

Logic I/O and GPIO 

Voltera D includes 4 channels of logic I/O and 4 channels of fixed function GPIO. 

The logic I/O provides the same customizable capabilities found on other Tesira devices.

The GPIO provides dedicated functionality:

  1. Input: Mute All / Active low
  2. Output: Health Status / Active fault if low
  3. Output: Standby Status / Unit in standby if low
  4. Input: Standby Mode / Active low

Analog audio inputs

Depending on the model, either 4 or 8 analog audio inputs are provided. These are line level only and can function in one of two modes - analog failover or as an analog input block in a Tesira system. 

When configured for an analog input block, the inputs are available to Tesira, serving as an analog input point to the system and routable to other destinations outside of the local loudspeaker controller they originate from.

When configured to support failover, the inputs will only be available to their particular loudspeaker controller and act as a backup for network media sources. This failover can be forced from software, allowing selection between the network media and analog input for a given channel. Note, that when configuring analog inputs for Voltera D from VenueTune, they are available in either a 1 to All, or 1 to 1 failover configuration.

More information on configuring input capabilities can be found at Voltera D Amplified Loudspeaker Controllers - Software configuration options.

Network connections

Voltera D loudspeaker controllers have two 1-Gigabit RJ-45 network ports. Additional detail on the configuration and operation of these ports can be found at Voltera D Amplified Loudspeaker Controllers - Networking.

Loudspeaker connections

Voltera D loudspeaker controllers include either 4 or 8 connections to the built in amplifier. The amplifier outputs will support sourcing the rated power into low impedance as well as constant voltage (70V / 100V) loudspeakers. The appropriate settings are applied based on the loudspeaker profile chosen during configuration.

Power asymmetry on every output provides a percentage of total chassis power beyond the symmetrical power per channel. The 4-channel models have power sharing capabilities up to 75% of the total power into any channel, while the 8-channel models support up to 50% of the total power to each. 

Voltera D power specs.png

Mating plugs for the loudspeaker wiring connections are included with Voltera D and can be reordered using Biamp part# 322.0430.900.



  • Was this article helpful?