Ok.. i noticed the issue.
I did a dumb troubleshoot method to diagnose the problem since i'm new to hifis.
I switch left speaker to right channel and right speaker to left channel.
Ended up it has the same issue with the right speaker too.
I start to notice that i'm not suppose to remove the jumper screws.
I put it in and fasten the jumpers caps and now both side is having normal sound.
Sound isnt as good as what i imagined.(At least at these price range, you can't expect it to be same level as high end speakers which cost a bomb)
But at least, pc speakers are nowhere comparable to these.
And also, it reserve some slots for me to add in surrounds and subwoofer in future.
Although i doubt that i need a subwoofer unless i'm trying to freak or irritate my neighbors.

I'm currently using this setup for my room entertainment. Wharfedale diamond 10.1 bass seems to be very sufficient for me. I personally hate heart thumping bass. I like clarity which gives soundstage and concert feel type quality speakers. I believe to meet such demand... 1-3k price range might not be sufficient unless i'm going with earphone or headphone solution..

Hi All Sifu ,

Wharfedale Pro Titan A12 Sub-Woofer .....

Any1 can share abt this woofer .......