Personally for the slight price difference I would go with the octane zrs... Better built, more power handling, better tinsel leads... If your dead set on the octane rs though they do well.. They can get pretty low, and wow did they impress me how loud they got... A few years back I was running 2 15 pg titaniums, and I wanted to do a swap out for test. So i took out the ti's, and put 2 octane 15s in, and wow they were just asloud, or louder (very efficent)... They didnt have as good sq, nor did they hit as low, but they are definately good budget woofers... In all honesty I would put forth more cash to get the octane zrs due to them being better built..