seem speaker is better than line out if you cannot connect any other speaker to use this jack
Left Side Subwoofer Jack (on selected models) The proprietary subwoofer jack is used to connect the subwoofer that comes with your Notebook PC ONLY. The subwoofer allows you to enjoy amazing bass (low frequency) sounds in your multimedia applications. DO NOT connect other device to this jack. Doing so may damage the subwoofer jack or the Notebook PC -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1040873 Title: [N56VZ, Realtek ALC663, Black Headphone Out, Right] No sound at all: Subwoofer not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1040873/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
