I recall seeing the terms "time coherent" and "phase coherent." Do these terms mean the same thing or are they different? Since this thread speaks to speaker alignment, perhaps someone could explain in layman's terms what causes speaker to operate out of phase. Does it have something to do with the use of caps and chokes in the x-over? Or perhaps the attribute of a dynamic speaker creating its own back EMF by reason of the voice coil moving in a magnetic field?? Incidentally, do all these electrical dynamics operating in tandem cause the electrical phase shifting that gives most amps a headache? Thanks |
Mofimadness answered correctly About time alignment.As far as phasing... it is simply having your individual drivers operating In unison at all frequencies... As you change crossover points and slopes, phasing changes between drivers.... Correct time and phase alignment is what seperates many ok speakers From world class speakers... These factors are why so many audiophiles like sigle drivers or point source.... I hope this helps, Tim |
Bifwynne, your entire post is a LOADED question! :-) we have discussed this way back in 2002. Here is the link to that thread (many very good & informative & technical posts by Roy Johnson of Green Mtn Audio speakers): http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1032037028 And here is a thread that Gmood1 started on Time & Phase as related to speaker operation: http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1060123575 And, finally, member Rbischoff (who started the 1st thread, above, that I provided the link) started another thread on First Order Cross-overs: Pros & Cons: http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1113252618 There is a great deal of really good info on this subject of phase & time coherency. Happy reading.... ;-) |
Bombaywalla, ... that;s for the links. I started reading into the threads. This is very complicated stuff. And I thought getting my arms around amp and speaker compatibility was tough. Speaker design is a beast. I will return to these threads over the weekend. In the end, as it seems to be the case with end end electronic gear, we're talking about design compromises. No perfect solutions ... just trade-offs that hopefully result in a product that sounds good. Thanks |
