Best speaker cable for audio physic padua speakers

I am currently own a pairs of AP padua (bright speaker). These speakers are great, clean, strong mid and high range. But I am dis....about low range (lack of bass). Someone told me that it might be speaker cable. I upgraded many s. cables:
Cardas Golden cross
Harmonix hs101
Tara labs the one
XLO limit
MIT 750
Xingdak
All cables would not help much warmth sound. are anyone having same problems? Is it due to speaker cables? and is which s.cable out there can help to improve the bass?