Doesnt resistance mean same as impedance??

                                      As mentioned, perhaps: easier to digest?

ie: https://www.audioholics.com/loudspeaker-design/understanding-impedance-electrical-phase

and: https://www.audioholics.com/loudspeaker-design/understanding-impedance-electrical-phase/page-2

Hi @carlsbad

I'm afraid your understanding is incomplete.

Reactance is associated with coils (inductors) and changing voltages.

While you are correct that a resistive load is equivalent to impedance with a zero phase angle, impedance can go from purely resistive to purely capacitive to purely inductive, and how pure it is of either of these is the reason for the phase angle.

Speakers with passive crossover have a number of all of these three components.  This is why the phase angle of your average 2-way speaker is complicated.

+1 Erik

@erik_squires

perhaps @carlsbad ’s understanding is not incomplete, but i do agree with you that his description was... of course he was trying to keep it simple for our o-p

the reactivity of speaker loads in real world use playing music at practical volumes (not test tones, etc etc) is at the heart of why amplifier to speaker matching (and synergy) is such an important concept, and so central to building a well performing system