Subwoofers with room correction built in?

@bigwave thanks for the heads up about this brand, even though they're currently out of commission

Check out Herb R's review of the SVS 3000 MIcro in this month's Stereophile.  He spends a good deal of time on the phone app and the many variables that are constantly adjustable via the app.

@twoleftears yeah, that review got me thinking about this concept again... I found it quite encouraging, but wanted a bigger sub that I could get a deal on.

Really like my MartinLogan 800x. I didn't find the anthem did a whole lot after I ran it but it along with the ML app allowing for wireless access to fine tuning the sub made it much better then my previous ML 1000w sub. Way less boomy and didn't keep the kids up in the evening anymore.

@redwoodaudio said: "This is an interesting option from Underwood hifi by DSpeaker: 8033 SII subwoofer equalizer. Just for the subwoofer."
That’s the unit I mentioned upthread. It is inexpensive, comes with a calibration mic, allows you to do repeated cycles with different mic placement and enables you to DSP just the subwoofers. That’s what I use with the 15 inch Rythmiks. I run it through another line out on my line stage. The main speaker system is not getting any signal from it and remains entirely unprocessed.
Very effective, both in terms of performance and cost, especially since I’m running those subs very low-- as mentioned, roll them off at 55hz on a 24 db/octave slope. The trick is dialing in the main speakers and woofers once the DSP does its thing- manually adjusting gain (including through use of a good SPL meter), phase, roll-off of the main speakers, their crossover point, etc. Still takes time and effort, and no remote, but it works well for me.