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VOLTERA A Series
A 300.2 A 600.2 A 300.4 A 600.4 Analog Amplifiers
Installation and Setup Guide
Product Information Sources
• This guide covers installing and setting up the amplifier.
• Please see the product datasheets on Biamp.com for each Voltera amplifier’s
specifications.
• If you are installing the amplifier in an AV system managed by a Tesira DSP device,
you will need a copy of the Tesira Design Software. See page 18 for details.
Included in the Box
• 0.3” euroblock connector plugs for the amplified outputs (yellow)
o 2 plugs for the 2-channel amps. 4 plugs for the 4-channel amps.
• 3.81mm audio input mating plugs
• Detachable IEC Power cord
• 4 adhesive feet
• 1 single device rack mounting bracket, 1 device rack mounting bracket, and 4
surface-mounting brackets.
Channels status display
(The number of channels varies by amplifier type.)
Amplifier type identifier
Power indicator
Installation Considerations
• Install the device away from heat sources, such as vents, radiators, heat registers, and
stoves.
• Do not exceed the maximum ambient operating temperature of 32° - 104° F (0° - 40° C).
• Avoid installing near water or steam.
Device Layout
Front Panel
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Voltera Amplifiers Installation and Setup Guide
Off
The amplifier is off.
Green
The amplifier is powered.
Yellow
The amplifier is asleep.
Off
Green
Yellow
Red
temp
Channel within safe
temperature limits
N/A
Fan speed medium
Fan speed max
limit
Channel within safe
limits
N/A
Channel limiting
low to medium
Channel
limiting high
signal
No signal
Signal
present*
Signal 6 dB from
maximum output
Signal 1 dB
from max
output
mute
Channel unmuted
N/A
N/A
Mute active
Front Panel LED Indicators
Power Indicator
Channel Status Indicators
*A minimum signal strength of -56 dBu is required to register as present.
Back Panel Channel Status Indicators
Signal present is indicated with green. Yellow and red indicate
the signal is strong enough to engage the limiter function.
These states are also shown on the channel’s front panel
signal and limit indicators. See the chart above.
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Voltera Amplifiers Installation and Setup Guide
Note: If the device is held in sleep using the logic input, after the boot the
device will remain in sleep mode and will not display the firmware version.
0 - 9 Binary representation:
0: 0000 5: 0101
1: 0001 6: 0110
2: 0010 7: 0111
3: 0011 8: 1000
4: 0100 9: 1001
Firmware Version Indicator
The device’s firmware version is identified using a sequence of lights on the Channel
Status indicator LEDs representing two binary numbers.
• Read the LEDs from top to bottom.
• When an LED is on it represents a 1.
• When an LED is off it represents a 0.
• Channel 1 indicates the major version number.
• Channel 2 indicates the minor version number.
This example is displaying firmware version 1.5,
• Channel 1, only the mute LED is on, a binary of 0001, representing 1.
• Channel 2, the temp and signal LEDs are off whereas the limit and mute LEDs
are on, a binary of 0101, representing 5.
Display the Firmware Version Indicator
Display the device’s firmware version by booting it from a powered off state and the
following will take place,
1. All the front panel LEDs flash green, then turn off briefly.
2. The device’s firmware version displays, on channel 1 and 2, for 2 seconds.
3. All the front panel LEDs flash green briefly before the device returns to
displaying normal channel statuses.
Firmware may be updated using the Voltera A Series firmware update tool, page 18.
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Voltera Amplifiers Installation and Setup Guide
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Voltera Amplifiers Installation and Setup Guide
A 300.2 and A 600.2 Back Panels
The amplifiers share an identical panel layout.
A 300.4 and A 600.4 Back Panels
Limit / signal indicators
2, 3-pin input ports
Logic input / output connectors
Voltage control input
Attenuator and high pass filter switches
2 speaker output ports
Channel 2 gain control
Channel 1 gain control
Factory config port
(not for use)
Channels 3 and 4 gain controls
4, 3-pin input ports
Logic input / output connectors
Voltage control input
Attenuator and high pass filter switches
4 Speaker output ports
Channel 2 gain control
Channel 1 gain control
Factory config port
(not for use)
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Voltera Amplifiers Installation and Setup Guide
Included Mounting Brackets
1 Single-Device Rack Mounting Bracket
1 Device Rack Mounting Bracket
4 Surface Mounting Brackets
Installation and Setup Overview
Installation
Perform the procedures described in the Installation chapter to install the amplifier on a flat
horizontal surface or in an AV equipment rack.
✓ Install in a location.
• Freestanding, page 8
• Surface mount, page 9
• A single amplifier in a 19-inch rack, page 10
• Dual amplifiers in a 19-inch rack, page 11
19-inch rack installation configurations using the included mounting brackets
✓ Connect the amplifier.
• Connect to its input, output, and other relevant devices in the system, page 13.
o This section includes a description of the port functions and technical details.
o Optional: Adjust the output gain levels.
o Set the output power modes on each channel and set the High Pass Filter to on
or off.
• Attach and plug in the power cord, page 17.
Amplifier Setup
Perform the procedures in the Setup chapter to configure the amplifier for use in a Tesira
software-administered AV system.
✓ Configure the amplifier.
• Download the Tesira Design Software, page 18.
• Add the amplifier to the Tesira system and select its output speaker types, page 19.
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Voltera Amplifiers Installation and Setup Guide
Installation
Install Option: Freestanding
Place the amplifier on a flat horizontal surface.
1. Verify the surface is flat and level, and that the amplifier's power cord and connections
will be safely out of the way to avoid snagging, yanking, or crushing.
2. Attach the 4 included adhesive feet to the bottom of the amplifier. The 4 feet should be
attached near the 4 corners.
3. Place the amplifier on the surface.
Advance to the connect the amplifier procedure on page 13.
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Voltera Amplifiers Installation and Setup Guide
Install Option: Surface Mount
Secure the amplifier to a flat surface using the surface mount brackets.
8x - M3x5mm screws
1. Verify the surface is flat and level, and that the amplifier’s power cord and connections
will be safely out of the way to avoid snagging, yanking, or crushing.
2. Use the included screws to fasten the 4 surface mounting brackets to the 4 attachment
points on the bottom of the amplifier.
Note: Use only the provided M3 x 5mm screws. Using incorrect screws may damage the
device.
3. Place the amplifier on the surface and fasten the mounting brackets to the surface.
Advance to the connect the amplifier procedure on page 13.
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Voltera Amplifiers Installation and Setup Guide
Install Option: A single amplifier in a 19-inch AV rack
Install a single amplifier by itself in an AV equipment rack using the included single-device
mounting bracket and the device mounting bracket.
4x – M4 x 8mm screws
1. Verify the installation rack space meets the temperature and spacing requirements in
the Installation Considerations section on page 2.
2. Attach the single-unit mounting bracket to the left or right side of the amplifier.
3. Attach the device mounting bracket to the opposite side of the amplifier.
4. Place the amplifier in the rack and use 2 of the included screws to secure the mounting
plate to the rack.
Advance to the Connect the Amplifier procedure on page 13.
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Voltera Amplifiers Installation and Setup Guide
Option: Dual devices in a 19-inch rack
Install two amplifiers side by side in a standard AV rack using the device mounting bracket
included with each unit and two of the included surface mounting brackets.
1. Verify the installation rack space meets the temperature and spacing requirements in
the Installation Considerations section on page 2.
2. Place both amplifiers side by side on their tops, with the bottom facing up. You are
about to fasten the amplifiers together for installation, so their front panels must face in
the same direction.
Note: Use only the provided M3 x 5mm screws. Using incorrect screws may damage the
device.
8x - M3 x 5mm screws
3. Attach 2 of the surface mounting brackets to the bottom of the 2 amplifiers on the
surface-mount attachment points where the amplifiers meet. Each bracket should cover
the adjoining mount points on both amplifiers.
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Voltera Amplifiers Installation and Setup Guide
4x – M4 x 8mm screws
4. Fasten the included device mounting bracket to the left side of the amplifier it came
with. Then fasten the included device mounting bracket to the right side of the second
amplifier.
5. Place the linked amplifiers in the rack and secure them in place.
Advance to the Connect the Amplifier procedure on page 13.
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Voltera Amplifiers Installation and Setup Guide
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Voltera Amplifiers Installation and Setup Guide
Connect the Amplifier and Set the Hardware Settings
Connect the amplifier to the input and output devices in the AV systems as well as any voltage
control and input / output logic. See the descriptions in this section for the port functions.
Adjust the mode settings and turn on the high pass filter if required for your system.
Connect the Input Devices to the Input Ports
Connect input AV devices requiring signal boosting to line and speaker voltage levels to the 3pin input ports.
Pitch: 3.81mm
Adjust the Output Gain
The default gain setting for each output channel is 0 dB. This provides a sensitivity of 4 dBu for
rated program power. The gain can be adjusted from mute to +3 dB using the back panel dial
control.
Limiter threshold: Increasing the gain over 0 dB also increases the limiter threshold for the
channel. For example, +3 dB grants a doubled program power capacity on that channel.
Switch position diagram
Switches: Each channel has 2 mode switches. These
can be positioned in 4 combinations activating one of
4 output modes.
The HPF switch is placed in either the ON or Off
position.
Set the Output Mode and High Pass Filter
Mode switches (M)
The 4 modes modify the gain structure and limiter thresholds.
• 100 Volts - use this mode if the channel will drive a constant voltage 100 V circuit with
peak power up to twice the nominal power.
• 70 Volts - use this mode if the channel will drive a constant voltage 70 V circuit with
peak power up to twice the nominal power.
• 8 Ω (ohm) – use this setting if the loudspeaker will drive an impedance greater than 6
ohms.*
• 4 Ω (ohm) - use this setting if the loudspeaker will drive an impedance lower than 6
ohms.*
*If power exceeding the rated program power is required, boost the gain trim above 0 dB. See
page 13.
The Tesira Design Software can further assist in optimizing the amplifier’s outputs.
High pass filter switch (HPF)
• Adds 70Hz second-order high pass filtering when in the ON position.
Connections and Settings continued on the next page
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Voltera Amplifiers Installation and Setup Guide
Note: Improperly wiring the
potentiometer to the Voltera A may
cause it to either function in reverse
or not function.
Ground
VC
+5V
Connect the Speakers to the Output Ports
Keep the following points in mind.
• To minimize power loss, use a speaker cable of appropriate gauge for the load
impedance.
• Use the supplied euroblock plugs to connect loudspeaker outputs.
• If stranded speaker wire is used, be sure to incorporate all strands into the connector, as
stray strands can short to the adjacent terminal or chassis.
• Do not leave excessive bare wire outside the terminals, as this can lead to shorts.
Optional: Connecting the Volume Control Inputs
Function: Output level adjustment. Provides 0V to 5V external volume control per input
channel.
Pitch: 3.5mm
Recommended: 10k linear-taper potentiometer.
Potential: These ports are not potential-free.
A linear-taper potentiometer in the 5k-50k range is recommended. If a logarithmic (audiotapered) potentiometer is used, the control will not seem to work evenly across the range.
The inputs do have noise filtering but for longer cable runs lower-value potentiometers in the
5k-10k range will have greater noise immunity.
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Voltera Amplifiers Installation and Setup Guide
Optional: Connecting the Logic Inputs and Outputs (I/Os)
Pitch: 3.5mm
Pin Functions
Note – the pin functions are factory set.
• Pin 1 Input: Mute all
o Active low
• Pin 2 Output: Health output
o Fault exists if low
• Pin 3 Output: Sleep mode status
o Unit asleep if low
• Pin 4 Input: Sleep mode
o In sleep mode when low
Potential: These ports are not potential-free. External relays may be needed to prevent ground
loops depending on the application.
Pin Data
• When activated, the I/O ports are tied to GND through a FET transistor.
o Also known as an open drain or open collect function.
• +5V reference limited to 150mA
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Voltera Amplifiers Installation and Setup Guide
Plug in the Amplifier
Always use the detachable power cord that came with the amplifier or an identical
replacement.
1. Attach the power cord to the power receptacle on the back of the amplifier.
2. Plug the connected power cord into the wall power outlet.
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Voltera Amplifiers Installation and Setup Guide
Amplifier Setup
For amplifiers being installed in a Tesira-managed AV system.
Downloading Tesira Design Software
You will need a copy of the Tesira Design Software when integrating the amplifier into an AV
system managed by a Tesira DSP device such as a Tesira Server or a TesiraFORTÉ. The software
enables the setup of a loudspeaker processing block preceding the amplifier in the system and
provides help on configuring the output mode switches and gain settings for the loudspeakers.
Voltera A amplifiers can also be installed in non-Tesira systems. You do not need a copy of the
Tesira Design Software for this type of system setup.
Download Site
The software can be downloaded from Biamp.com.
• Click here: Tesira Software (biamp.com)
Tesira Help System
The Tesira Software Help system provides instructions and overviews for using the Tesira
Design software. It is typically embedded on digital Tesira system devices and can also be
found online.
• Tesira Help System (Online)
Support Articles & Firmware Update Tool
Technical support articles for Tesira Software can be found on Biamp’s Cornerstone
knowledgebase support site.
• Click here: Tesira - Biamp Cornerstone
Cornerstone is also the location of the Voltera A Series firmware update tool.
• Click here: Voltera A Amplifier firmware update tool - Biamp Cornerstone
Training
Training courses for Tesira products and system core concepts are available online.
• Click here: Biamp Training – In Person and Online Training, Certification Courses
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Voltera Amplifiers Installation and Setup Guide
Configuring the Amplifier in a Tesira System
For Tesira-DSP-managed systems only. See the Tesira Help system described on the previous
page for help configuring the speaker in the AV system.
1. Connect a computer with the Tesira software to the controller device for the AV system
the amplifier is now installed in.
2. Use the Tesira software to add the amplifier to the AV system topology.
3. Select the speaker types the amplifier will output to.
4. Save and then upload the configuration file to the controller.
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Voltera Amplifiers Installation and Setup Guide
November 09, 2023
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