Sub setting when mains set to Small? (1 Viewer)

[ChrisAG]

Given that there is always some overlap with these settings,

If the LFE is sent to the sub with your mains set to Small using the receiver's fixed crossover of 100Hz, what sould the sub's crossover setting be?

I understand that subs work best with low crossover settings - asking them to perform well at 120Hz compromises their ability down at 25 Hz, and vice-versa.

I've heard that there should be a one octave overlap. Forgive my ignorance, but how much is one octave?

 

[Steve_Ma]

In that scenario, the sub's x-over should be at it's highest possible setting or disabled alltogether if your sub will allow it.
Here's the reason:
You only want to split the signal once. With the speakers' set to small and the sub = yes, your receiver is already splitting the singal and sending the material below the x-over to the sub.
Now, if you ALSO use your sub's x-over, you risk filtering an already filtered signal. You're more likely to get gaps in your bass response this way. Setting the sub's x-over to it's highest point (effectively) gets it "out of the way." You don't need the sub's x-over at all because that task was already done "upstream" at the receiver.
--Steve

 

[ChrisAG]

Makes perfect sense... thanks!