Usally recievers aren't used to power subs. Subs are usally powered. Its not slim but i really like my harmon/kardon 320 i think. It blows my high end (or used to be) kenwood away. Harmon doesn't rate thier power the same so don't dissmiss it cause it says only 50 watts. I will guarantee you those will be clean and hang with most others 100 watts.