Rel Subwoofer phase question

The phase setting of each sub is dependent on their location in the room relative to your listening position.  So depending on where they are located, they might be both set the same, or they can be set differently

this is correct ^^^

that’s why one shouldn’t mainly theorize, but actually try it in the room to get it right sonically 

+2 @paradisecom ​​​​@jjss49 .  Sub location in the room is what determines proper phase adjustment.  Obviously make sure the wires are connected in phase.  If using the high level REL input, this means at the source end.  Yes , while REL adjustments are 0 / 180 vs completely adjustable, it does make it easier to hear the difference with your ears, and not constantly fiddling with phase.  I find it enough to adjust the low pass filter and volume once the phase is set.  Nice subs @hiendmmoe!

I have got brand new speakers that were wired backwards. Yes, it's possible. Don't worry about what things are set at, worry about how they sound. If they sound better out of phase, then run them that way. 

House wiring can be out of phase, the plug can be out of phase, the internal worker can be out of phase. 

Focus on sound, do what sounds good.

Interesting timing on this question for me as I have the same thing going on and it’s got me very confused.  I have the two speakers in identical opposite positions in the room down to just a few millimetres and the subs are in identical positions relative to the speakers.  Even more confusing is if I put one sub at 0 degrees the system sounds best with the other at 180, but if I put the first at 180, the system sounds best with the second at 0.  I’ve double and triple checked everything I can think of down to the wiring on the REL high level connectors and I can’t figure out what is going on.  I will add the room is rectangular but not 100% symmetrical on the walls with windows on one side and not the other and a few other what I thought are minor things going on.  I’d love to have an expert on room modes / acoustics say there is a good reason for this or why it’s happening so I don’t think I’m losing my mind.  

No expert here, but I would say it is the sound waves of one subwoofer interacting with the sound waves of the other subwoofer.  Bass sound waves are very large...easy for them to collide with either a positive or negative way.  Now add this to how the sound waves interact with the room (booming) and adjusting the phase can help augment or nullify these as well.  You are not loosing your mind.