"Thanks for your interest in our products. The most recent iOS from Apple does not require a firmware update. So, the DACport LX will work right out of the box with the iPad.
The only other item you will need to connect the DACport LX to your iPad is a "Camera Connection Kit". This allows a "regular" USB device to be connected to your iPad."
Maybe it applies to only LX which doesn't have amp section in it? What he meant by firmware update is iPad firmware for DACPort, which I asked about.
I have an iPad 2 with iOS 4.3.3 and when I plug in the standard DACport the iPad tells me it uses too much power. Maybe the LX is the exception, since my unamped Pico DAC works fine.