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Advanced Setup 29
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advanCed setup
Loading a Custom Low-Pass Filter
To add a custom low-pass filter to your subwoofer you must first
visit MartinLogan.com:
• www.martinlogan.com/balancedforce210/download
• www.martinlogan.com/balancedforce212/download
Download the appropriate file to match your main speakers.
Save the custom low-pass file in the root directory of a USB flash
drive. To assure a successful upload to your subwoofer we rec-
ommend having no other files or folders on the flash drive—the
subwoofer can only load one file at a time.
Insert the flash drive into the USB Input on the back of the
subwoofer. The subwoofer will automatically find the file and
load the custom low-pass filter. When a USB flash drive is
connecting to the USB Input the USB Status light indicates the
following information:
No color: Idle (no USB device currently connected).
Flashing Green: Reading USB flash drive.
Solid Green: Success. File found and loaded. Okay to
remove USB flash drive.
Solid Red: Failed. No changes made. Cannot find file or
flash drive not formatted using FAT32 file system (see FAQ and
Troubleshooting).
Flashing Red: Failed. Cannot read drive due to electrical
problem.
Updating Firmware
Please note, the subwoofer will load whichever firmware revi-
sion is on the connected flash drive—even if the firmware revision
on the flash drive is older than what is currently loaded on your
subwoofer. To make sure you’re installing the latest firmware revi-
sion check MartinLogan.com before updating your subwoofer:
• www.martinlogan.com/balancedforce210/download
• www.martinlogan.com/balancedforce212/download
To check which revision your subwoofer currently has installed,
press the Custom Low-Pass button and hold it for 3 seconds. The
Tone Sweep LED light will blink a number of times that is equal to
the current revision number (e.g. two blinks = revision 2 firmware).
Please note, updating the firmware should not erase settings for
PBK (Perfect Bass Kit) and the Custom Low-Pass filter. A notice
will be posted on our website alongside the firmware download
if, for some unforeseen reason, a specific firmware revision must
erase these settings—otherwise, these setting should still be in
place after a firmware update.
1 To update your subwoofer’s firmware you must first visit
MartinLogan. (www.martinlogan.com/balancedforce210/
download or www.martinlogan.com/balancedforce212/
download) and download the latest firmware file for your
subwoofer model. Save the firmware file in the root directory
of a USB flash drive. To assure a successful upload to your
subwoofer we recommend having no other files or folders on
the flash drive—the subwoofer can only load one file at a
time.
2 Unplug the subwoofer from the AC outlet.
3 Insert the flash drive into the USB Input on the back of the
subwoofer.
4 Reconnect the subwoofer to the AC outlet. The USB Status
LED will continually blink red-green-red-green while the firm-
ware is being updated—this blinking may pause momentarily
during the update. Do not remove the flash drive until the LED
stops blinking and shows a solid color for at least 5 seconds.
See below.
When a USB flash drive is connecting to the USB Input the USB
Status light indicates the following information:
No color: Idle (no USB device currently connected).
Blinking Green/Red: Reading USB flash drive.
Solid Green (for over 5 seconds): Success. File found
and loaded. Okay to remove USB flash drive.
Solid Red (for over 5 seconds): Failed. No changes
made. Cannot find file or flash drive not formatted using FAT32
file system (see FAQ and Troubleshooting).
Blinking Red: Failed. Cannot read drive due to electrical
problem.