@highend64 Would two subs receiving the same signal placed symmetrical to the listening position work in this aspect? What are your thoughts?
From my experience directly comparing the big REL Studio III Sub Bass System and a Velodyne DD-18 Subwoofer their low frequency responses were quite different. The Studio III's dramatic -6dB low frequency roll off simply did not excite the rooms standing waves allowing it to be located most anywhere in the room.
Despite the Velodyne SC-1250 User Manual: page 12 EQ (Auto EQ) these instructions are dated and somewhat misleading. Yes, this first iteration of Auto EQ would easily adjust frequency peaks resulting from convenient subwoofer locations. It also resulted in a potential loss of the available low frequency performance quality due to poor room positioning.
With the Velodyne's ability to be adjusted in the +dB range at its lowest frequency response it seemed there was a period of time before they realized to take full advantage of this ability which would require accurate standing wave room mapping and sub woofer positioning for optimal in room integration and lowest frequency clarity.
With the release of the Digital Drive Series Manual after the setup procedure a positioning "Tip" using the microphone to identify the rooms bass mode positions was added.
For the release of the penultimate DD Plus Series playing the Sweep Tones and performing the subwoofer crawl became the first instruction after unboxing. Subsequently differentiating room integration by proper positioning from the Auto EQ's Sweep Tones now simultaneously played through the main speakers and the subwoofer for incredibly simple and stunningly accurate full system integration.
My strong suggestion would be to patiently find a Digital Drive 10" Plus. It's really that simple to setup and remote controlled six presets fun to use. The 10" Plus I have in my studio was better than the DD-18 I had in my main system.
Velodyne's Plus acoustical sensing and Auto EQ firmware of fourteen subwoofer parameters seemed to have launched the company into the field of autonomous Lidar prompting the sale of Velodyne Acoustics to GmbH. All the best with your search.