I wanted to get better sound in my Toyota Tercel (4 door '95 model). I was just wondering how many inches do you recommend the subwoofers be 10 or 12in and how many watts to give me nice sound at high volumes? Also how many watts should my amplifer be? How many channels should I get? I wanted at least a 4 channel amp but if you think one with less channels would do fine let me know. Also if I get a 4 channel amp i would connect 2 to the 2 subwoofers but the other 2 should i put them in the 2 front speakers or two back? Sorry for all the questions i just want to get the right thing. THANKS!!!