A smartphone to calibrate extra low frequency seems questionable but way better than no EQ and remote control.
I've owned six Velodyne Acoustics subwoofer's beginning with the ULD and currently two DD Plus' for the past eleven years.
A failed remote receiver in my early DD was replaced for free well out of warranty but prior to the sale of the company.
I don't think there's anything out there that provides the convenience of the Velodyne Parametric Filter Frequency and Level drag and drop adjustment for eight individual frequency bands not to mention Velodyne's other features that I use often.
By the way DD-10 Plus measures 13"W x 14.2"H x 16.5"D.
Good luck with your search.
I've owned six Velodyne Acoustics subwoofer's beginning with the ULD and currently two DD Plus' for the past eleven years.
A failed remote receiver in my early DD was replaced for free well out of warranty but prior to the sale of the company.
I don't think there's anything out there that provides the convenience of the Velodyne Parametric Filter Frequency and Level drag and drop adjustment for eight individual frequency bands not to mention Velodyne's other features that I use often.
By the way DD-10 Plus measures 13"W x 14.2"H x 16.5"D.
Good luck with your search.

