Hello, everyone! First of all, I'd like to greet the Forums from Budapest, Hungary - after browsing it for a while I found it to be a really nice, civilized and useful place. Cheers! Now the reason I'm posting. I've built a new PC (with Asus P5K mobo) for a friend who has a 6-channel speaker system and when I connect it to the mobo's on-board audio the Center/Sub speakers doesn't work. I began experimenting with a simple headset's jack and the driver has detected it in all ports (asking me what did I plug in), except for the Center/Sub and L-R Side-speakers' (for 7.1) ports. The odd thing is I've tried this with two other PCs as well (these were P5KC mobos, but same on-board audio - Realtek ALC883, one with factory BIOS, the other with an upgraded one) and the results were exactly the same. I've tried all possible audio I/O settings in Realtek's control panel (headset, 2-4-6-8 ch) but nothing. Is there something I'm doing wrong or all ALC883s on Asus P5K series are deffective?! And one more thing. If I configure the Front Panel audio port as Center/Sub in Realtek's control panel, it works just fine as Center/Sub! I've called the tech-guys at the dealer's and they said they never heard about this problem before and I should take back the mobo. But is it possible that all three *different* mobos are deffective in the same way? The config: Mobo: ASUS P5K Rev. 1.02G BIOS: 0603 (factory) CPU: Intel Core 2 Duo E4300 RAM: Kingston DDR2 800MHz 2GB kit of 2 Video: Gigabyte GF8400 GS 256MB DDR2 Audio: Realtek ALC883 (on-board) HD: Samsung HD321KJ 320GB (SATA II) DVD: LG GSA-H66N (SATA) OS: Windows XP SP2 Hungarian, Regional and Language Settings: Hungarian (the OS's been just reinstalled, there's no other software except for the factory drivers) DirectX: 9.0c Audio driver: 188.8.131.5291 (latest from ASUS) If anyone's got any ideas or experienced the same problem, please let me know! Thanks!