Rell or JL subwoofer?

I have the JL Audio 110's, never had any problems. I now use it for 100% music, and they sound great. When I did surround sound, they sounded fine also. I really appreciate the DSP,  it really made setting it up and matching it to the main speakers easy. I get great low bass, but it all sounds as if it's coming from my main speakers. The only thing I'd like is to be able to adjust the volume from an app. But then I'd probably be playing with it all the time, so it's fine.

I've heard good things about SVS and Rel, I doubt you'd go wrong with any of them.

I’ve owned Martin Logan, HSU, SVS SB15 and SB16, JL Audio F110s with the CR1, JL Audio F112s, REL Carbons, and REL G1 mkII, I currently use REL No. 32s. Which one works best for you depends on your room, system, and your preferences.

My view is that the JL Audio subs are, in large part, superior because of the built in room correction.  Is that worth the huge prices? Not sure.

Was reading the responses, and  I don’t know how I it got pasee me that svs has the 3000 and 4000 series!!! Adding them to the equation, JL, Rel or svs?   I read that JL has the room correction thing,  I guess it will come down to which set I can get the best deal on, my cousin has a car audio shop and might have acces yo dealer pricing on some of these

You can get 2 SVS SB3000s for $2100 (or $2000 if you buy them from their outlet), and they include integration software and come with a 45-day, risk-free trial including shipping both ways along with great customer service.  Rel has no integration software if that matters, and I believe both Rel and JL will be considerably more expensive for comparable specs.  Best of luck.