Subwoofers

It looks like you may be selling yourself a little short. With that nice of a set of speakers, I would think a set of REL carbon specials could do the trick properly. Plus, that way as time goes by you can save your pennies and start stacking them for a line array. Or you could just use a pair of 212/sx and be done with it. Good luck 👍 most jealous of your quest. 

Carbons are more than I want to spend. 

what do you all think of this sub 

https://www.crutchfield.com/p_265B1122WA/Revel-Performa3-B112v2-High-Gloss-Walnut.html?tp=187

@greywolf I haven't heard the Revel, but I notice that it only has line level inputs.  Maybe that works for you, but I like connecting the REL with speaker level for two channel.  It also has separate line level inputs for a LFE channel if your system doubles as a home theatre line mine does.  You can use both inputs simultaneously and it has separate gain controls for each.  

I also noticed that the crossover frequency is shown as 50 to 150.  To get my subs to blend, I'm considerably lower than 50. Not sure if that's a problem.

Thanks sls883, two channel system with a NAD M12 preamp with 2 sub outs. Used for TV, music and streaming movies.

Never had a sub with high level hook up.  

The really nice thing about having high level and the LFE input is that I can set the high level output low for music and crank up the LFE gain for movies.  If you are using the subs for home theatre, I think I'd go with the REL S812 if you like loud explosions, etc.  The S510 would work for some people, but I like a little more for home theater especially in my large room.  I don't know if other subwoofer brands will also do this. Perhaps they will.

I lucked out and got both of my REL subs new for under $4500.  You probably won't get a deal like that, but I would guess that some of the larger online resellers would discount 10% if you call them (Music Direct, Audio Advisor, Crutchfield, etc).