Gents (and maybe ladies),
For instance we have a 2 way crossover “x”
We design it to be flat etc.. when we invert the polarity of one of the drivers should we get a large , deep suckout at the crossover frequency showing good agreeement? What if we invert it and almostn nothing happens , is this showing poor phase or agreement? Cheers!
For instance we have a 2 way crossover “x”
We design it to be flat etc.. when we invert the polarity of one of the drivers should we get a large , deep suckout at the crossover frequency showing good agreeement? What if we invert it and almostn nothing happens , is this showing poor phase or agreement? Cheers!
The driver acoustical outputs must be 180 degrees apart at the crossover frequency to cancel
in a deep null. If they don't cancel, then there is not a 180 degree difference.
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Not unless you should.
With, say, LR2 and LR4 then yes. Not with, say, 3rd order Butterworth, which is in phase quadrature with the individual filters down 3dB at the crossover frequency and sums flat whatever the driver polarity is, either 90 degrees or 270 degrees apart in phase.
Everybody so far is technically correct.
But, frankly, are going way over your head.
I encourage you to build some excellent speakers.
Quiet little bedroom speakers might look like this 5" bass plus 1" tweeter in an uncomplicated reflex (aka bassy) box:
Peerless HDS PPB 830860
If you want something that can go loud and still sound good in a bigger room, this is a great example of your Classic 3 way:
SEAS-3-Way-Classic
I could discuss the merits of phase alignment with even order LR4 filters, versus odd order slopes like BW3 with better dispersion till the cows come home. The truth is they can both sound good. IMO, the real skill is choosing good drivers that just play nicely together at all levels.
If you are lucky, you get good frequency response, good power response. Good impedance. Low distortion. And time-alignment that works well. The above two examples are better than average. Troels Gravesen has been doing this long enough that he does it well. Trust him.
But, frankly, are going way over your head.
I encourage you to build some excellent speakers.
Quiet little bedroom speakers might look like this 5" bass plus 1" tweeter in an uncomplicated reflex (aka bassy) box:
Peerless HDS PPB 830860
If you want something that can go loud and still sound good in a bigger room, this is a great example of your Classic 3 way:
SEAS-3-Way-Classic
I could discuss the merits of phase alignment with even order LR4 filters, versus odd order slopes like BW3 with better dispersion till the cows come home. The truth is they can both sound good. IMO, the real skill is choosing good drivers that just play nicely together at all levels.
If you are lucky, you get good frequency response, good power response. Good impedance. Low distortion. And time-alignment that works well. The above two examples are better than average. Troels Gravesen has been doing this long enough that he does it well. Trust him.
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