Re: apogee 3x3s2 vs eaw 650z
I think you should be able to get it close enough as I suggested above to test the 120Hz crossover idea. The only problem with this method is you can easily end up being 360 or even 720 degrees out, but in this case the boxes are physically aligned and you know to expect a delay on the subs of between 2-5 ms.
If you picked 4 ms with this method and Smaart told you, it should have been 4.5 ms …but you could not hear the difference between 4 and 4.5 when you listened, neither will the audience :roll: ... so I think you should be OK.
You just need a signal generator (e.g iPhone app) at the cross over frequency of 120Hz or what ever you decide to try, set the subs and 650s so they are producing about the same level and adjust the delay for maximum output. (you can gain up the subs to suit you taste after you have set the delay)
With a 24dB LR crossover the phase/time alignment (of the crossover output) will not change with frequency, however the speakers in the 650s and the subs will however have slightly different low frequency phase responses. When you raise the crossover frequency there will be a small relative change, I think you will luck if you notice anything.
Good luck ...
