I went to bestbuy and bought a 4G SD CARD (class 6) rated at 30m/s
I placed it into the amp and tried formatting it.
it rebooted. I've tried saving a file and it rebooted. Does it not like the 4G size?
I stuck an old and slow 1G SD CARD and I was able to save .JAM files but not .WAV files, it just reboots the amplifier