cardas golden reference biwire

Just hooked up a pair of used but new wires mentioned above. I did not have my speakers biwired before. There is a significant change with these wires. The bass is just a little overpowering. Will this change with "break in"? or is this a result of the type of wire or the added benefit of the biwire? I am not sure I can live with this much base. However I love the extended mids and highs, trhe soundstage has also doubled incredibly.