Can I switch between a single HDL300 and Dual HDL300 system?

How to combine and divide two HDL300 systems for use in configurable spaces
Last Updated: February 8th, 2022

A switchable configuration may be useful in a meeting room with a movable divider, partition, wall or door. In this case, two HDL300 systems may be combined for Dual HDL300 operation when the meeting area is configured to the larger size.  The HDL300 systems can be divided again when the space is returned to smaller rooms.

A 2-way A/B manual ethernet switch is needed in the configuration to switch in and out the one integrated microphone and speaker bar. The switch needs to support a minimum of 10/100 Base-T Ethernet standards and pass PoE power.

Tested units:

  • CablesOnline Manual Switch Box SB-034
  • L-Com A/B Network Switch with Ethernet Control (has been tested and allows for switching remotely via telnet, web browser or SNMP)

The first set-up diagramed below switches one of the integrated microphone and speaker bars in and out of the system. This allows for a dual operation when the second microphone and speaker bar is switched into the system and allows for one of the smaller partitioned rooms to operate in single HDL300 mode when the rooms are divided.

The second set-up illustrated below switches one of the integrated microphone and speaker bars between two systems. When the “B” position is selected on the switch both configurations will work together as a dual system. When the “A” position is selected, the left microphone and speaker bar will connect to the left connect module and computer, and the right microphone and speaker bar is connected to the right connect module and computer. These two separate systems can each run independently in the two divided rooms.

The connect module should have firmware version 2.0 or higher, which supports dual system operation. Also, perform a fast calibration when the unit is switched between the two configurations.

Make sure the room meets the size requirements when configured for either the single or dual HDL300 system. Sound absorbing dividers should be considered to minimize the reverberation within the room and for minimal sound to pass between the rooms when the single system is in use.

Downgrading a Dual HDL300 system to Single HDL300 system

If you choose to downgrade your Dual HDL300 system to a single system and no longer use ethernet switching, you can easily reconfigure your dual system to accommodate changes in your space as follows.

  • Decide on which of the speaker bars to decommission
  • On the Connect Module, identify the ethernet cable that connects the speaker bar you want to decommission and unplug. 
  • Unmount the speaker bar from the wall, disconnect the ethernet cable and store both cable and speaker bar in a safe place for future use.

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