My computer crashed and it was a dell dimension shitbox whatever but i was running acid pro 6.0 and have an audiophile 2496 soundcard a tubepre preamp and a MXL V67 mic and the quality was awesome.

now im on my Mac G5 with the same soundcard as before and the other stuff is also the same ( it can go on both systems) and everything sounds so shitty! I now am using Abelton live lite on my mac to record. Why does it sound like shit? and how do i make it so i can't hear myself in my headphones while im recording...or doing anything for that matter?

Please Help!!!