x2Tweeters certainly didnt fade out. Anybody that cares about good audio goes components instead of 2way, 3way, or 4way speakers. To answer the first question, yeah you'll be able to tell it but not sure you need it. Tweeters carry most of the audible range and are very important. High frequencies are directional so some properly placed tweeters can improve sound. You don't want too much though. And if you cant point them at your head there is no use for them.