I used the midrange. While I have enough bass with the setup I have...a pair of Pioneer three ways...I miss the subs.
I'm looking at replacing the Monsoon amp with a PPI 900.4. I'm getting older and find the need to crank it up even more. The setup I have is giving me a bit more distortion than I like.
Once the bank account recovers from that, then I'll look into a sub.