Actually, I don't look for anything in particular other than music I like. If it has content below 20Hz, I want to hear it.

I don't mind experimenting and trial and error but I do like to start as close to the finish line as possible with some science.

So here's what I've fingered out:

1. My LFRs are 10.7' away. My subs are 10.25' away. I can't get them any closer because of heat vents.

2. In time, the LFRs are 9.5 msec away. The subs are 9.1 msec away. So this means the sound from the subs will arrive at my ears 0.4 msec earlier than the LFRs.

3. At 40 Hz, 0.4 msec is 5.8 degrees. This is because a full cycle of 360 degrees is 25 msec at 40Hz so 0.4*360/25 = 5.8.

4. So I should be able to slightly advance the sub's phase control by 5.8 degrees and have complete alignment.

So far so good. The million dollar question in all this is,"What delay do the LFR and sub DSPs add"? That's a question for Axiom.

Note then that if any delay beyond 0.4 msec is added by the DSPs, the only way, for my set-up, to align the sub and LFR would be by setting the sub's switch to invert and then advancing the phase control. This off-set will still miss the portion of the waveform equal to the delay through the DSPs.

It appears that it's impossible to achieve complete alignment in time and phase without a distance control if the subs are closer to the MLP than the LFRs by the transit delay of the DSP.

Last edited by Mojo; 11/30/19 07:54 PM.
House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated