Ivanj.:
To followup on Cornfedboy's comment regarding previous threads, you may want to do a search for a post I started back in May on this very subject entitled "Speaker Cable Lengths - W/Monos". I received a lot of constructive Audiogoner assistance.
At the time I was inquiring into your very dilemma. In a nut shell, for my particular cables, there was such thing as "too short" per the manufacturer as it relates to the design of the cable. (In my case with Tara "The Ones", the min. recommendedation was 4 feet.)
Ultimately, I did cut my 10 footers down to 4'-3" lengths and biwired, and I was very, very satisfied. I would recommend that you touch base with the cable manufacturer, and ultimately have them do your mods if you use a high end cable.
Good Luck.