Subwoofers with room correction built in?


Who has experience, good or bad or whatever, with the built-in room correction/DSP/EQ that newer subwoofers (except REL) come with these days?  I’m excited to try the system built into an ELAC sub 3070 that’s coming my way soon, but I want to be realistic.
Thanks.
redwoodaudio
It's good to know that there are external DSPs that can be had for reasonable prices, but right now I'm primarily interested in hearing from those who have had subs w/ the feature built in.  Anybody else care to share?
Well the just of it is, the ones I built work great and the plate amps your asking about are very close. It's worth your while. Along with room treatment, DSP is a great tool and pretty easy to use..

Mic position is the key if you ask me? Right where your head is going to be.

I'm not saying you'll like the way it sounds though.. Really some people just don't like the sound. It doesn't account for OUR ears sensitivity or the lack of it.

Better off with it, than without it. That's for sure.. I use the PEQ function for a 50 and 70 hz bump works great..

Enjoy
No experience but lots of reading with almost universal love...the Dynamo series from Martin Logan. Anthem Room Correction built in. Full app control.
The Anthem Room Correction on my Martin-Logan Balanced Force 210 sub is nothing short of outstanding.  The difference between no correction and corrected is the difference between bass that goes in and out, depending on the note, and sound that is equal in volume as the bass player goes up and down the neck.  Quite beautiful.

I only have one sub though.  Perhaps it would be less noticeable with a DBA.
@docknow and @doctors11 -- I hadn’t considered a Martin Logan sub -- thanks for the tip. Glad to hear the room correction is seriously helpful.  Interestingly, the balanced force sub has two drivers in opposition like the elac.