Sub with 2 different drivers or 2 subs (1 Viewer)

[Francesco Chu]

I was thinking about the following. Smaller drivers like 8" are fast while 15" are loud and low. Is it possible to run an 8" and a 15" as a 2 way sub just like a 2 way speaker? Using a Xover to figure out what goes where. Any pros and cons? This is pure speculation of course.

 

[Greg Monfort]

The implication that size determines speed is false. There are 15" drivers as 'fast' as an 8", they just won't have the same polar (off axis) response since their large surface area will cause beaming at a much lower frequency than the 8".
WRT combining them, this is the same as part of a multi-way speaker, and isn't a good idea unless the sub is going to be centered between the Sats, and the XO point to the sub is kept below the point where path length differences are audible. Typically, this is

 

[Francesco Chu]

So I am wasting my time thinking along those lines... Oh well, you learn... or at lease pretend you learn...