I sold the old precision to pick up a Warwick, because Warwick makes a fine bass. However, after putting a set of the old reliable XLs, it's not giving me the sound I like from XLs. There's plenty of low end, and low mids for that matter, but it's just sort of muddy sounding. Is this an issue of strings, or of pickups being too close to the strings? The pickups are up pretty high, but I didn't want to mess with them in case the answer was as simple as using prosteels instead. Can magnetic pull account for mudiness?