Whats the diffence? I am looking for that oldschool dirty sound, but still with some volume and clarity on the E and A string. Furthermore I need some strings that i can bow on (its not what I do most, but sometimes it comes in handy use) I am currently looking at Lenzner gut strings. I figure they have that old sound but still can be bowed on. But Lenzner makes both strings sets with pure gut and sets with a wounded E and A string. It may seemes as a stupid question, (yes I am newbie on the upright bass), but whats the difference, in terms of tension, sound etc, between wounded and non wounded gut strings?