Lab.gruppen Amplifier

All 3 power models in the D Series platform are available as Tesira variants for seamless integration into a comprehensive networked environment based on AVB protocols. All amplifiers function as a discrete high-power output device in the Tesira environment, with multi-channel audio inputs, control and monitoring all carried over a single Cat-5e/6 network cable. Full amplifier specifications and manuals are available at Lab.Gruppen.com

• D 200:4T
• D 120:4T
• D 80:4T  

An analog input option is available for analog failover, which may be required in critical PA/VA applications.  These are specified as separate model variant -

• D 200:4Ta
• D 120:4Ta
• D 80:4Ta

Software features

• D Series Tesira system integration - Tesira expander class device with full integration of amplifier configuration and amplifier surveillance
• Device swap - Host name hot swap with full configuration transfer
• Auto power down - Configurable auto power down to ultra low consumption SLEEP state
• Channel processing - Mute, Level, Signal invert

AVB Audio Network

• AVB I/O 4x4
• Sample rates / transport 48 kHz / Unicast
• Network latency Configurable 1 or 2 milliseconds

Optional 4 channels analog inputs

• Usage Configurable as Tesira system inputs or analog failover
• Balanced mic or line level input +48V phantom power and digitally controlled input gain
• Maximum input and digital reference +24 dBu
• Sampling rate / resolution 48 kHz / 24 bit
• Input impedance 8 k ohm
• Frequency response (20 Hz - 20 kHz @ 4 dBu) +/- 0.25 dB
• THD+N (20 Hz - 20 kHz @ 0 dB gain +4 dBu in) 0.006%
• Dynamic range (20 Hz - 20 kHz, 0 dB) > 108 dB
• Cross talk (20 Hz - 20 kHz @ 0 dB gain + 4 dBu in) > 85 dB

Amplifier Features

• Rational Power Management™ (RPM) – True flexibility in allocating total available power output across channel count for most efficient use of system inventory
• Up to 5000 W per channel for driving high power elements (e.g. subwoofers) on all models
• • all 4 channels on D 200:4T
  • up to two channels on D 120:4T
  • up to one channel on D 80:4T
• Integrates seamlessly with Tesira DSP platform as a high-power output object
• Control D Series from within Tesira software
• Platform indicators for Alarm, Activity, Status and Power and per-channel indicators for Load, Amp, Signal and Mute
• CAFÉ (Configuring Amplifiers For the Environment) Software incorporating ESP (Equipment Specification Predictor) for design, system planning and equipment planning, installation and commissioning.
• Regulated Switch-Mode Power Supply (R.SMPS™)
• Breaker Emulation Limiter (BEL™) to prevent power interruption
• Under-voltage Limiting (UVL™) for continued operation despite severe voltage drops
• Best-in-class Power Factor Correction (PFC) with Current Draw Modelling
• Proven and reliable Class TD® Output Stage with patented Intercooler® high-efficiency cooling system
• Dedicated on-board surveillance & load monitoring system
• Optional analog inputs for local system inputs or analog failover (D 200:4Ta, D 120:4Ta, D 80:4Ta)
• Detachable Phoenix plug-in audio connectors for audio I/O

 

Rear Panel Connections:

Speaker Outputs

Connect your speaker cabling here.

AVB / Control

The amplifier is configured and connected to in the same way as any other Tesira AVB Expander. Please review the AVB Network Considerations section for more details.

Serial Connector

The RS232 interface is used to control the power state of the amplifier externally. It operates at 9600 baud with 8 data bits, 1 stop bit, and no parity bits. These settings cannot be modified.

The following are the list of text commands. Each command and response ends with a carriage return <CR>, which is hexadecimal 0x0D. Each command and response is case-sensitive.

 

Text Command	Text Response	Description
wake	OK	When in the SLEEP state, transitions to the ON state. Because this wakes up the Tesira host card from SLEEP, the Tesira host card will respond with the text response once it is powered up and ready to receive new commands. Will also reply If already in the ON or STANDBY states
Wake	ERR	While in the ON or STANDBY state, an error will be returned as a text response of ERR<CR> if an unrecognized command or an invalid power value is received. While in the SLEEP state no error is returned. When powering up or transitioning from, or to, SLEEP, a text response of ERR<CR> will be returned. It is necessary to wait for the OK<CR> before issuing valid commands.
status	0- Sleep      1- On  2- Standby	Returns the status of the power state of the Tesira host card.
set power <value>	OK	Transitions to the power state specified by the value. This text command is not available in the SLEEP state. Use “wake” command to turn on the amplifier and then use this command to change the power state.

 

Logic Connector

The Logic connector is used for power control and status monitoring. The connector use is fixed and is defined as follows:

 

Pin	Function	Description
1	Ground
2	Input	A transition from logic 0 to logic 1 transitions the power state to ON. A transition from logic 1 to logic 0 transitions the power state to SLEEP. This is edge triggered.
3	Input	Not used
4	Output	A logic 0 when the amplifier is in the ON state and logic 1 otherwise (STANDBY and SLEEP).
5	Output	A logic 0 when either the amplifier or an audio channel has at least one fault. A logic 1 when there are no faults. Faults detected by the Tesira application that runs on the Tesira host card do not apply to this output.

 

NOTE: A logic 1 is defined as TTL high level and a logic 0 is defined as TTL low level