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Operation Manual
I-Tech HD Series Power Amplifi ers
page 24
4.4 File Transfer Via the USB Port
On the front panel of the amplifi er is a USB Type A port which can transfer fi les either 
direction between a USB fl ash drive and the amplifi er. These fi les can be of two types:
A Preset fi le, which contains amplifi er DSP settings for a specifi c loudspeaker/
amplifi er confi guration. 
A Device fi le, which contain all 50 presets and the current amplifi er DSP settings.
When you plug in the drive, the amplfi ier defaults to a fi le-exchange mode and is 
muted. Then you can load or save individual fi les. No computer is needed for this fi le 
transfer.
How to transfer a fi le from a USB fl ash drive to the amplifi er:
1. The fi le must reside in the fl ash-drive root (top-level) directory.
2. Plug the fl ash drive into the amplifi er’s USB port on the front panel.
3. The screen asks if you want to load or save a fi le. Press the left Encoder to LOAD a 
fi le.
4. The screen asks whether you want to load a device fi le or preset fi le. Press the left 
Encoder to load a device fi le, or press the right Encoder to load a preset fi le.
5. The screen says “Select File to Load.” Turn an Encoder to select the fi le. 
6. If you are loading a preset, the front panel shows the acceptable fi les in the fl ash 
drive root directory. Turn the Encoder to view the fi les; press the Encoder to select. 
Note: You can’t explore folders or subfolders.
7. The amplifi er loads the fi le into its memory and displays the Eject Menu. To stop 
the transfers, press the left Encoder. To continue with more transfers, press the right 
Encoder.
8. Unplug the fl ash drive. The amp is unmuted and returns to the determined state.
9. If desired, recall the preset following the procedures in Sections 4.3.2 and 4.3.3.
How to transfer a fi le from the amplifi er to a USB fl ash drive:
1. Plug the fl ash drive into the amplifi er’s USB port on the front panel.
2. The amplifi er goes into “File Mode” and is muted.
3. The front panel asks if you want to load or save a fi le. Press the right Encoder to 
select SAVE.
4. The screen will ask whether you want to save a device fi le or preset fi le. Press the 
left encoder to save a device fi le, or press the right encoder to save a preset fi le.
5. If you chose to save a preset fi le, the screen says “Select Preset to Save.”
6. The screen shows the preset fi les in the amplifi er’s memory. Turn an Encoder to 
view the fi les; press the Encoder to select.
7. The amplifi er’s Preset fi le will be saved to a default fi lename in the fl ash-drive root 
directory.  If the default fi lename already exists, a number will be appended to the end 
of the fi lename. 
8. You will see the Eject Menu. To stop the transfers, press the left Encoder. To 
continue with more transfers, press the right Encoder. Unplug the drive when 
fi nished.
9. Unplug the fl ash drive. The amp is unmuted and returns to the determined state.
4 Advanced Operation
Insert USB Device
USB Main Menu
  LOAD or SAVE
Ch1
Enc
Ch2
Enc
      Save a File
DEVICE    PRESET
Save Device File
Load Preset File
     Load a File
DEVICE   PRESET
Load Device File
Save Preset File
Ch2
Enc
Select Preset to
            Save
Select file to load
Select Preset to
     Overwrite
Select file to load
EJECT  MENU
DONE
NOTE: Pressing any of the navigation buttons
(MENU, PREV or NEXT) at any time will go to the
“EJECT-MENU” selection screen.
Ch1
Enc
     (Pop-up box)
Loading Device File
     (Pop-up box)
      Loading File
        Successful
     (Pop-up box)
   Safe to Remove
     (Pop-up box)
      Loading File
            Failed!
      (Pop-up box)
  Overwriting Preset
         Successful
     (Pop-up box)
Overwriting Preset
            Failed!
     (Pop-up box)
      Save to USB
        Successful
     (Pop-up box)
      Save to USB
            Failed!
     (Pop-up box)
      Save to USB
        Successful
     (Pop-up box)
      Save to USB
            Failed!
Figure 4.3  USB File Transfer Flow Chart