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ACU/NHB Firmware V1.11 & CobraNet(CM-1) Firmware V2.9.16 for Win 7/Vista/XP

Important Notice

Corresponding to Low Latency

  • Though the recently released V1.11 firmware for ACU16-C and NHB32-C supports the low latency modes of CobraNet, it may be the case that these low latency modes cannot be used due to an old version of the CobraNet module being installed in the ACU16-C or NHB32-C. This depends upon their production timing.
  • Units whose serial number (found on the rear panel) start with the following letters* cannot switch latency. Units with other serial numbers can normally switch to low latency without firmware update.

    * IO, IP, IX, IY, IZ, JH, JI, JJ, JK

Difference in behaviour due to various version combinations of ACU16-C, NHB32-C, and CobraNet module

  • The latency sometimes cannot be switched due to different version combinations, as the CobraNet module must be a compatible version with the ACU16-C and NHB32-C firmware. If the latency cannot be switched, then check the version combination and the behaviour in the following table.
  • Please use the latest version of CobraNet Discovery in upgrading CobraNet Module (CM-1) firmware. Cobranet Discovery can be downloaded from the following URL.

Behavior when
latency is switched
V1.01 V2.8.8 NetworkAmp Manager is working at 5.33ms without any change though it looks as if it is set. It does not show error messages, etc. Choose 5.33ms to operate it.
V2.8.8 The latency can be set only to 5.33ms. An applicable ACU16-C or NHB32-C shows an error message, "An error has occurred! Skip this device or abort?" if users try to execute "Connect & send to network" to set latency to other than 5.33ms. Choose 5.33ms to operate it.
Users can switch the latency normally.

Main Revisions and Enhancements

Fixed Bugs

  • Fixed a bug that the communication between a PC and a power amplifier goes offline if the communication breaks down between the ACU and another ACU or NHB (caused by the CobraNet cable being pulled out, or the HUB being turned off for example).
  • Fixed a problem that communication between NHB and other NHB/ACUs goes offline if the NHB's word clock is not set to "NETWORK" and it becomes unlocked.

System Requirements

OS Windows 7
32-bit, Ultimate / Professional / Home Premium
Windows Vista
32-bit; Ultimate/Enterprise/Business/Home Premium/Home Basic
Windows XP
Professional / Home Edition/td>
Windows 2000
CPU 1.4GHz or higher Intel Core/Pentium/Celeron family processor Intel Pentium/Celeron 450MHz or faster
Memory 1GB or more 64MB or more
HDD 100MB or more
Display 1024 x 768 pixels or higher; High Color 16-bit or higher
Other USB port USB port or COM port

former version information.

ACU/NHB Firmware V1.10 & NetworkAmp Manager V1.1.0 for Win

New Features
  • Low latency mode of CobraNet is now supported, which enables users to choose from 5.33ms,2.67ms and 1.33ms.
  • It became possible to control PC-1N series amps via NetworkAmp Manager.
Fixed Bug
  • A message “Amplifier gone offline” was logged in the log window even when no operation was performed.
  • A message “Unexpected data change detected” was logged in the log window of NetworkAmp Manager even when no operation was performed.
  • When communication between NetworkAmp Manager and ACU/NHB was disconnected a dialog saying “Disconnected from network because the connected ACU/NHB has not responded for over 30 seconds!” was shown even when no operation was performed.
  • Parameters sent was not correctly affected when “Connect & send to setwork” was executed via NetworkAmp Manager.
  • A message saying “ACU16-C gone offline” or “NHB32-C gone offline” was logged in the log window when connecting via NetworkAmp Manager.
  • When switching to a page in NetworkAmp Manager, it occasionally was brought back to the previous page unexpectedly.
  • It took longer for NetworkAmp Manager to get connected when NetworkAmp Manager was just invoked and never went online by executing “Connect to network” via NetworkAmp Manager.
  • When two or more NHBs were connected and NetworkAmp Manager showed Patch page for one NHB, switching Patch page to another one did not occasionally make the new page shown correctly.
  • Control Link page was occasionally flickered.

License agreement and software

ACU/NHB Firmware V1.11 & CobraNet(CM-1) Firmware V2.9.16 for Win 7/Vista/XP

You also need to download these files.

You are recommended to download these files.

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