Subs with room correction DSP?

I’m in the market for a sub or two

You might start by researching the value of two, or more subwoofers vs. one.

Also, it would be great to see what your system looks like under virtual system. What frequency range should the subs be covering? How big is your room? What are the room dimensions?

Another question that I have is why don’t more manufacturers offer subwoofer DSP? What is the downside of DSP? I can see that the upside might be the ability to place the subwoofer(s) in less than ideal position. Is DSP one of the top features needed when shopping for subwoofers?

I recognize that you simply asked for DSP subwoofer brands/models, but I guess that I’m asking why DSP and is this the best solution for your room/equipment? I went with REL and it did take some work to get things right, but that was a one time effort.  One of the main challenges that I had with bass was keeping the stylus/cartridge/tonearm/platter free from the subwoofer output.  This issue extends beyond analog play, but can also act upon other components.

Lastly, are you trying to get things right within a two cubic foot listening box, or will you need to consider a larger listening area?  This is an important question and one that goes back to subwoofer placement, type and number.

I believe SVS and now Hsu offer some sort of app that lets you configure the sub from your listening location.

I believe SVS and now Hsu offer some sort of app that lets you configure the sub from your listening location.

I don't know about Hsu, but I have two SVS subs. The app includes PEQ, phase, level, polarity, low-pass filtering, and more. All configuration can be done from the listening chair.

The SVS is looking good. 
Yes there is an app to control it, but it's still just guesswork without a program to measure the frequency response of the room. 

There’s the Velodyne Acoustics DD Plus. It requires a subwoofer crawl to identify room locations. Connections to either a TV or a laptop to monitor adjustments. It’s supplied with a calibrated mic positioned at the listening position and connected to the sub. A Sweep Tone CD thats played as the Auto EQ runs a twenty minute sweep of the room, main speakers and the sub/s between 200-15Hz all at the same time. The Plus Auto EQ adjusts the subwoofers thirteen parameters within eight discrete frequency bands which reflect the mains presentation onto the sub beginning at 100Hz to 20Hz. The process is graphically monitored on the TV or laptop and saved to memory.

At this point the six manufacturer presets have also been auto EQ’d and have been saved to memory.

After completion the user can choose to open the Frequency Response and Parameters Screen (page 10-11 User Interface Manual) and augment the the Auto EQ by making multiple simultaneous adjustments using the drag and drop feature. As well as manual adjustments of all the individual parameters and save to an individual memory preset.

http://velodyneacoustics.com/pdf/digitaldriveplus/DD+Manual.pdf

https://www.velodyneacoustics.com/pdf/digitaldriveplus/DD+UserInterfaceManual.pd

In my experience with an early JL F113 v1 and an early DD-18 were well over a decade old and their processing dramatically different. Despite those differences, I believe their unique in house driver technology and build quality were on par with each other. The F113 driven by the EQ settings of the DD was simply phenomenal.

IMO todays home audio enthusiast still struggle with trial and error room positioning as result of manufactures erroneous location suggestions. They’re stifled by deficient and complicated low frequency signal processing and integration measures some requiring dealer assistance. Having experienced the potential and ease of implementation that David Hall and his developers succeeded in, anybody would agree all these subwoofer mysteries were elegantly and affordably solved over a decade ago.

Soon after Velodyne’s DD Plus barely marketed release it seems brighter avenues of technology altered the goals of one of the biggest little subwoofer manufactures and leaving home audio with undefined DSP marketing, line arrays and chrome plated -6dB sub-bass speaker six packs doing the low frequency rope-a-dope.