NOS (never used!) Volume Control & Buffer Amp Board F-2574 for AU11000 (probably for AU9900 too).
As you can see on the pictures, the board is really like new condition (on all solder points for connecting wires you can still see copper) .
Please look carefully at all four high resolution pictures, because they are part of description.
Installation should be done by qualified technician only, because it is not simple to do that!
Please note, I cannot accept return or refund for this item once when that item will be shipped to you.