Actually, DT, you have found the solution to all your questions just by experimenting. But you need the technical reasoning behind it all, which I will try to help with.
1. Phase is whether the speaker cone is moving out with a signal that is also moving out. Think of a trumpet blast as an outgoing phase launch, one can feel that air move towards you. Another example is talking vs. talking while breathing in (yes, it sounds weird). You might say it should always be 'in' phase or 0, but some electronics change the absolute phase of the recording simply by the number of stages of amplification they have in them (even - in phase, odd - out of phase).
2. This is the easy one. You want the one that "fights" less with your main speakers, meaning your speakers are in one phase and your sub in the opposite, creating cancellations. And that means....more bass output. So 0 is correct.
3. It depends on your ears; if the crossover is fairly high, you may hear a hollowness in the music. But set it at 0 and you'll get to listen to all the bass you paid for.
Hope this helps!
1. Phase is whether the speaker cone is moving out with a signal that is also moving out. Think of a trumpet blast as an outgoing phase launch, one can feel that air move towards you. Another example is talking vs. talking while breathing in (yes, it sounds weird). You might say it should always be 'in' phase or 0, but some electronics change the absolute phase of the recording simply by the number of stages of amplification they have in them (even - in phase, odd - out of phase).
2. This is the easy one. You want the one that "fights" less with your main speakers, meaning your speakers are in one phase and your sub in the opposite, creating cancellations. And that means....more bass output. So 0 is correct.
3. It depends on your ears; if the crossover is fairly high, you may hear a hollowness in the music. But set it at 0 and you'll get to listen to all the bass you paid for.
Hope this helps!