Ok, it's bass and not base. And to answer your question - no. Sub woofers are made to play bass notes ( 200hz or less ), mid-range is for just that ( 200hz to about 8000hz ) and tweeters are designer to play high notes 0 8000hz and higher. Ok, some definitions spec the actual frequencies differently, but you get the idea. And if you talk about 1400 watt on a 12 inch speaker - you will need a lot of high frequency power to just move the speaker coils. My recommendation - buy a decent set of speakers that covers the entire audio spectrum in a nice linear curve. Ask for variable crossovers for the cutoff frequencies between bass, mid and treble.

No and always buy the largset diameter base speakers you can afford.

These are the types of Q's and A's I joined the site for. Thanks guys, I've a bit more knowledge now when I'm ready to update my equipment!