View attachment 12492 View attachment 12491 It probably won’t work in the way you are hoping it will. The source/sink requires one sub on frontwall and one sub on rear wall. When setup right, it will eliminate all length modes. It won’t work if you don’t have a sub on the frontwall.
It takes a little effort to set it all up. It is correct that the anti-phase sub is not time aligned to the seated position. It’s actually a little slow. The sub behind the seated position should be delayed so that the front sub (plane wave) meets the rear sub wave behind seated position. The rear sub should be in opposite electrical polarity from front sub. Once you have things setup correctly with delay and electrical polarity, you need to generate pink noise in REW and switch to a Hann window using RTA, while measuring both subs together. Then you slowly adjust the phase knob on the rear sub until the bass is flat. It’s amazing to see it in action. When it’s flat, you can then calculate the correct delay for the rear sub by add the rear sub phase rotation together with delay you already set for rear sub. I used Acourate Convolver to set it up.
Even tho the rear sub is not perfectly time aligned, overall time domain (decay) is greatly improved. So the net effect is much tighter and articulate bass than any other mono sub arrays.
Currently, I don’t use this method. I’m using 4 subs. All of them are in stereo configuration. The front subs and rear subs are cascaded by frequency to get the smoothest response. It’s kind of best of both approach because you can get smooth bass with DSP EQ and sub position (eliminate boundary interference). All 4 subs are time aligned to seated position.
So I’d say source sink is the best method if you have 2 subs and a nasty rectangular room.
The above REW screenshots are measurements of the source/sink without any EQ applied.