so sick of losing power when a/c is on

[n00b on demand]

Ive had my SVX since Nov of 2003 so this is my first summer with this car. Now when i drive other peoples cars i never really notice a loss of power when the a/c is on but in the SVX it is veryyyy noticeable. When i have my a/c on i usually have it in the middle on the second setting with the temp down to 65 degrees. If I am at a red light and i acclerate the car wont rev or and it will move a tiny bit then it will burst out with energy and be fine. When i turn off the a/c this never happens and the car runs normal. Why does the a/c drain so much power?