Hello,
I use two of the JL Audio F110 subs with the JL Audio CR1 crossover. My speakers are rated down to 25hz at -3db. I am one of those goofballs who use their two channel system as part of the surround system. Both my two channel system and the CR1 crossover have home theater bypass so I can use the JL Audio subs with both systems. In my room which is 24’x13.8’x8’. I have two REL T9 subs which I will add later. I mostly listen to 2 channel split between tt and my DAC. It all sounds really, really good. I have found that the subs make everything sound more real because bass adds dimension and space because it enhances or lets you realize time. I sometimes like to listen at low volume. By adding the subs it lets me get great dynamic range. I know subs are heavy and you don’t want to pay shipping to try them out. If you live in the Chicagoland area this store lets you try before you buy.
holmaudio.com
This is a great way to see if subs can make a difference. I know everyone has their preferences. By demoing in your home you can make up
your own mind. I hope this helps.