ใครมีใช้อยู่ก็สามารถตามไปโหลด FW 2.5.6 ได้เลยครับ

http://www.acousticresearch-hifi.com/AR-M2/

Firmware 2.5.6
http://static.voxxintl.com/firmware/ARM2/HIFI-AR6780-ota-eng_mmc.zip

Firmware Update Guide
http://static.voxxintl.com/firmware/ARM2/M2_Firmware_2.5.6_Update_Guide.pdf




>Acoustic Research M2 Firmware 2.5.6 Release Note

>Change log

2.5.6
- Gapless playback support
- Correct misdetection of sample rate in playing some Apple Lossless (ALAC) files

2.3.1
- Korean IME included

2.2.1
- Improved compatibility for the WAVE-EX format

2.1.0
- Revised power saving scheme
Reduces possible ‘pops’ caused by enabling/disabling the analogue circuitry
- Reduced power consumption for 16/44.1kHz CD quality playback
- Additional support for non-unicode ID3 tags in MP3 files

>Notes and Requirements for Firmware Update

- Firmware upgrade is not field reversible. After the firmware upgrade, customers will not be able to revert the firmware back to earlier version.
- 1GB free space or more is available on the internal storage of M2
- Windows 7/8/10 or newer
- Mac OS X 10.6.9 or above with Android File Transfer installed
- Upgrade should only be executed when the battery level is 80% or higher

>Procedures to Update Firmware

1. Download the firmware file HIFI-8926-ota-eng_mmc.zip
2. Connect AR-M2 to the computer with Micro USB data cable
3. For PC users, run Windows Explorer. Open ARM2 > Internal SD card.
Copy the file into the root level of Internal SD card

For Mac users, run Android File Transfer (if it does not launch automatically)
If a micro SD card has been installed, please select Internal SD card.
Copy the file into the root level of the Internal SD card.
4. Disconnect AR-M2 from the computer after the file transfer completes
5. Open Settings > About devices, select System update
6. Select Local updates > FOLDER > Internal storage
7. Select HIFI-8926-ota-eng_mmc.zip
8. After the prompt “Are you sure to reboot?” appears, select OK

The firmware update will be executed.
Please do not interrupt the firmware update process until completion.

>4th April 2016