Thanks Eric. I will order he cables up and try the oppo out.
Richard, its not really the sub distances I'm correcting for. Their physical location is part of the puzzle, but the bigger issue is the internal latency of the dsp and electronics/driver.
The close mic measured latency from a test impulse to my mains is about 4ms.
The close mic measured latency to subs is about 25ms. The subs dont have a clean impulse, from measuring in room, so its hard to get an exact figure.
Once I add in delay for distance to mlp considering all channels I cant correct for the 25ms. I should be able to get them both time and phase aligned with the oppo and 2x4.
Some might ask "why go through the trouble?"
The reason is when two or more wavefronts converge on a single point in space, in time and in phase, they sum additively, load that point with pressure, and present a cleaner response to neighboring frequencies by reducing out of phase cancellation.
I will post response and phase plots with 'tape measure' setting, 'time aligned' setting, and 'phase and time aligned' setting with impressions later.
I can say getting time aligned is the big one to maximise output.
Ill start a new thread so its easier to find later.
