The newer iterations of ARC include a phase matching tool, in addition to the Room EQ functionality. I have not seen any objective reviews of the phase matching feature, but have read in another forum that the AVM 90 is ready to go other than the addition of this phase matching feature to ARC Genesis.If you are using the sub in a system with Room EQ a phase adjustment is not used and therefore not needed.
If you use it in a system without DSP, then it is essential.
naaah. it's just a delay, like all variable "phase" knobs. calling those knobs phase-anything is just a stupid idea someone once had and more stupid people copied.
A phase angle between two signals from the same signal source indicates a delay between the two.
Subs are integrated because the room screws up your full range speakers. In every room.I'm a fan of subs, and consider them essential for HT. However, threads like this one lead me to appreciate the view that a well designed "full" range speaker like the big Revel towers or the remarkable Genelec 8361A is the wiser choice when compared to main/sub integration that may well not be done properly.
The subs are labeled Delay and go from 0-16ms. Are you saying you can't get 16ms of delay from them? In my experience in a 16 ft room I did, unless I just got lucky where things lined up.While it does add delay -- I double checked and it appears to be about 4.5 ms if flipped to 180 degrees -- it's not like a pure digital time delay because the phase becomes "bent" or "mangled" or whicher description you prefer. The Rythmik subwoofer's variable delay/phase knob behaves more like an analog all-pass filter.
Irony is that even for subs with long wavelengths, like all phase alignments, once subs are further apart than 1/4 wavelength at summation frequencies , the phase alignments break down fairly rapidly.
The subs are labeled Delay and go from 0-16ms. Are you saying you can't get 16ms of delay from them? In my experience in a 16 ft room I did, unless I just got lucky where things lined up.
I usually don't even measure phase if my frequency response is smooth.