How does it sound with one sub disconnected?
...and can you visually see if the subs are doing a lot of excursion?
Sorry man I don't know if I 100% understand you. I am assuming here that the subs are in parallel for the sake of amplifier load; and that the 'phase issue' that is being spoken about is between the two subs...sorry if I'm reading this wrong...
If you took a sub out that would obviously change amp load - it would definitely fix the out of phase subs - but create another problem. My thought was to change the wiring of ONE of the subs to the other...
However I just thought about it a bit more right now and realised that I think I'm talking complete bullshit and that this comment is one of the stupidest things I have ever said related to car audio...whoops...
Sorry...for what it's worth I was trying to help! I can actually blame DIYMA this time though...for exposing me to a guy who is a psychopath and his pawns who introduce themselves to a conversation by abusing me for answering a comment that has been posed to me. Can't delete my account but I have removed all information and set all privacy to max. I have had a shitful of that place.
Apologies...pretty sure my comment is VERY wrong and from there it goes to a little bit of an off topic bitchy whinge...my bad.