That feature is mostly going to be used by folks that are using a calibrated mic & analyzing software for room correction or such.
For a NOOB just set to defeat and move on.
But should you find the sub integration process difficult due to room issues,and you need to do such,you'll be real glad that sub has that feature.
That's one of those "better to have it and not need it vs. need it and not have it" sorta things.
I personally feel you can never have too many adjustment options for a sub,just so long as one understands what their function is.
Ahh yes,,,one of my
favorite sub controls and the one feature many (most) subs DONT have...
Per the text in that graphic,this control can be KEY to getting a sub to integrate seemlessly.
Phase in the context of subwoofers is just a simplified way of saying time correction.
Most subs will only have a 0°-180° switch,and in some cases that's all that is needed.
But IME rarely is that the case.
That's because in most sub installs actual sub placement is a compromise at best.
In many situations the distance between the sub and the mains is far enough apart that some time correction is necessary.
And when that is the case,that 0°-180° phase switch is'nt going to cut it,and you'll be REAL happy you have an adjustable phase control.
And yeah,that's what is meant by "time correction",to get the signal that is coming from the sub to be "timed" correctly relative to the mains.
The further the mains are from the sub,the more likely time correction/phase adjustment will be needed.
And the more precisely you can set the phase,the better the sub(s) will integrate with the mains.
Ok,this one is one those things that a new guy is gonna go
.
Basically it's like the text in that graphic says,for 2ch use set the low pass switch to either 50Hz or 80Hz w/a 24db slope.
Big speakers go lower so those would use 50Hz,smaller speakers dont go as low so they use 80Hz.
If the receiver/preamp/prepro has it's own controls for low pass,then it gets set to AVR12.
That mostly relates to how the sub is going to integrate with the mains.
The mains will have their "low end rolloff" point and ideally the sub's upper extension should blend well so there are no dips in the bass response.
If the upper extension goes too high that's when subs often get "boomy" sounding.
Too low and there will be a dip in the response and the bass response may sound "thin/weak".
This is one area where each person typically has to tweak things a bit to find what they prefer.
That's what the crossover Hz control is for.
The rumble filter is intended for situations where too much low freguency energy is undesireable (TT useage and such).
Those other filters are not a common feature at all,so one would just set those per their instructions.
Of course these are somewhat simplified answers,but they should help some,and I'm sure others will chime in on the finer details.
HTH
Bret P.