BDP 83 has an audiophile upgrade for $299. The Special Edition enhances only the analog audio connection (Stereo, 5.1ch or 7.1ch). If you use HDMI the upgrade is not recommended.
The upgrade will involve the replacing of the following parts from the player:
1. Audio Board
2. Power Supply Board
3. Back Panel with RS232 port.
OPPO BDP 83 Upgrade