Audio Kinesis Swarm Subwoofer Awarded 2019 Golden Ear Award by Robert E. Greene

I am kn the experimentation phase . I think i have nailed it . Partially of intuition and partly convenience. I happened to have a couple like new powered subs .jbl sp 150 .  Very versatile and adjustable . I went to the music store and bought the best mic cables they had. 100’ plugged into the back of my mac c46 from the balanced output 2 . Main 18” come off of output 1 . 
I found i barely had to have the subs on at all (the powered 10”). I was able to tweek my dual 18” up a bit . For some reason the new setup allowed it.  One sub is up 7’ on a heavy duty shelf above my oven in the kitchen laying on its side on a piece of foam woofer to the wall. In the other corner on the floor the second 10” on the floor on foam ,woofer to the wall behind a large oak bar area . Polarity reversed . Volume as low as possible without the sub thinking its of . I felt the cone and turned the dial until i could sense vibration in my hand . That is all . Now the airspace is so smooth its almost like you are wearing headphones but the stage is in front of you . Pretty cool i already had everything and never considered it before . 

Hello davekayc,

     Congratulations, it seems like you happened into discovering a good combination of positions for both of your JBL subs that's providing the very good bass response a dual sub bass system is capable of.  I believe the sub unusually positioned on a shelf over your oven, about 7' above the floor, may be the key to your good fortune.
     The main goal in a dual sub bass setup is to position both subs sequentially in your room at the optimum positions in relation to your listening seat.  The best method I'm aware of for accomplishing this is the crawl method.  If you were starting from scratch, this is the procedure I'd have suggested you follow for optimally positioning each of your JBL subs:

 1. Connect sub#1, place it at your listening seat and play some music with good and repetitive bass. 
2. Beginning at the front right corner of your room, begin slowly walking or crawling around the perimeter of your room, in a counter-clockwise direction, until the bass sounds best to you (smooth, fast, detailed, solid and natural).  Once you find this first exact spot, you move sub#1 to this spot. 
3. Connect sub#2 and place it at your listening seat position, replay the music with both sub#1 and #2 playing and, beginning at sub#1, slowly continue walking or crawling around the perimeter of your room until you discover the next exact spot in your room the bass sounds best to you. Once you find this first exact spot,  move sub#2 to this spot. 

4. Sit at your listening position, replay the music with both sub#1 & #2 playing and verify the bass sounds very good to you.  If it does, your subs are likely optimally positioned and you can continue on to the next procedure phase of optimally setting each sub's Volume, Crossover Frequency and Phase controls.  (Procedure for this phase will be described later.)  If the bass does not sound very good to you at your listening position, you'll need to repeat the procedure starting at step 1.

     The above is the procedure I'd recommend, however, it seems like you just experimented with positioning your subs without following this procedure.  You may have just placed each sub at a convenient or available room position but it's very fortunate that you did, since you apparently discovered an unusual position (7' above the floor on a shelf above your oven) that surprisingly works very well in your room.  The truth is that you would not have discovered this very good but unusual location for 1 of your subs if you strictly followed my suggested crawl method.  You got very lucky because this is a very valuable discovery.
     If you're completely satisfied with the bass response performance of your system from your listening position with your 2 subs in their current positions, I would definitely suggest you leave them right there and buy some lottery tickets immediately.
     If you're not completely satisfied for any reason but you're okay with one sub being located on the shelf above your oven, my suggestion is to just treat the sub on the shelf as an optimally positioned sub#1.  You'd then have the option of further experimenting by treating the sub behind your bar area as sub#2. You could then follow my procedure starting at step#3.  Just place sub#2 at your listening position with both sub#1 & #2 playing and walk slowly around the perimeter of your room and find an exact spot where the overall bass sounds the best to you.  This spot may be behind your bar area or the bass may even sound better, from your listening position, with sub#2 located at a different position in your room.  Only a bit of experimenting and listening from your listening position will let you know for sure.
     I hope this was all clear to you and helped a bit.   


    
     


     
      

I actually did hang out up in those areas . The oven is a built in double wall oven which is more structural than shelf actually . I shifted the sub into the corner and was up and down the ladder a dozen times setting adjustments while switching from misic to 

.. music to movies to the news to radio on and on . Using a powered sub was the big thing . I honestly do not know how i would have achieved this result with out having adjustments . It sounds .. revolutionary. Thanks for your insight . It as it turns out is indeed mathematics as well as discovery. Over the last year tweaking  this system i have been imagining all the angles of reflection in this room (56x36x15) adding the subs almost seemed to erase the need for room treatment . As a matter of fact some of the adjustments on my c46 were then backed off a bit from their original settings for room correction !

Ps. I’m not finished experimenting yet . I have cables still running cross country until i get a few days of listening in (100ft balanced mic cables )