10" self powered sub-woofers.....

@charliee   it would seem to me that if you have a volume control you have a variable electrical result of it's the mechanical movement.  I would tend to think that variable output could be paralleled to this or any sub.
@doctors11    90 degree RCAs came in last night so this AM I should be able to get them plugged in and the spike covers off the legs to provide a much better grounding.  I believe my 9 foot RCA temporary pair should be here today and a 90 degree IEC adapter and an Audio quest cord tomorrow.  Making progress.

Exciting times. Are the 90 degree RCAs necessary in the front firing configuration? I was under the impression there was enough room for standard interconnects. I'll probably do front firing as well.

@doctors11   My music room is carpeted.  I am connected with standard RCAs at the moment but that does put some pressure on them and I can't pull the spike covers and set the sub into the carpet and underlying concrete.  Probably should not even have them connected this way but I was careful.  Just order up a pair of Audioquest 90 degree RCA adaptors and an Audioquest 90 degree IEC adaptor on the same page as the sub...  ...  together it's maybe another $40.  You will need the 90 degree IEC if you plan on upgrading the cord anyway. 

@doctors11  An update for this Saturday...... April 24th... 90 degree Audioquest RCA adapters are here and the sub is now on Blue Jeans Cable LC-1, 3 meter length. Admittedly, not my first choice but an affordable one until I have an opportunity to acquire my first choice, LOL, pre-owned. Audioquest NRG-X3 cord is due in today as is an Audioquest 90 degree position 1 IEC adapter. I plan on using 10 - 20 pounds of additional top cabinet weight to make sure the sub is very solidly spiked to the ground. It currently is on its rubber spike covers and has maybe 10 hours of the recommended 50 hours of break in time. If I was going to comment at this point I would say the articulation of double bass riffs up and down to the bottom (and organ) was completely superior to the NHTs. I also feel I’m getting very close to fully dialed in at this point and if I can match them to the roll-off of 30 year old 8" bass drivers in my Acoustats you can match them to anything. Presently set @ -20 db, 40 hz third order low pass, 20-30 hz level at +2 db.... everything is adjustable by the db, hz, and phase angle degree Very worthwhile for my listening so far and will only get better when I get it off the rubber feet...

Thank you so much @midareff1 for these write ups. It's been hard to find many customer reviews with well thought out details like yours. I value tight accurate bass over all else and I have space constraints so as of now this is a clear first choice for me. I will be using the room correction and upon further reading I was impressed that they recognize that android phones differ greatly in their built in mic, so they have software that measures your individual phone mic before proceeding to run the room correction. Pretty cool!