I'm sorry.我講的太快了而且沒有說清楚,造成各位困擾
其實X-FI在原先設計上是要和喇叭共用一個接孔
而且當切換後也需要在Console中設定現在是喇叭或是耳機
這個有點麻煩,如果您又常常需要耳機或喇叭換來換去
不過感謝大大提供這麼好的方法,下次小弟也要來試看看

其實這忽然讓我想起以前使用Live時,我喜歡用KX驅動程式來聽音樂
而KX驅動程式原先的設定是"默認前後置交換"
所以我的2.0聲道喇叭必須要插入黑色的插孔才有聲音
而KX小組的解釋是如此可以獲得更好的音質(解釋如下)
The AC97 Codecs used in SBLive! cards are rather noisy devices (when compared to I2S Codecs), and this leads to some quality problems. As a rule, SBLive Rear outputs have much better Signal To Noise Ratio (SNR), Total Harmonic Distortion (THD) and Channel Separation (acs) since they use the I2S Codec. So, if you want to get better sound quality for music playback it is recommended that you plug your speakers into the 'Rear Out' and enable the 'Swap Front and Rear' kX Mixer option (the swap is enabled by default).

結果聽習慣後,我有一天便很好奇的取消前後置交換,用前置來輸出
當下聽了以後馬上就給它換了回來,因為真的有差...

所以如果用線性輸出孔1音質沒差的話,那就太棒了!!