Push pull configuration

[DirtySchemer 10+ year member]

I've recently been reading about using two subs in a push pull configuration... not isobaric, but actually on opposite sides of the enclosure with one sub inverted and wired out of phase (which puts it in phase since it's inverted). I hear it does wonders for cancelling out non-linearities caused by slight differences between the front and back of a woofer. Also, if the two speakers are properly secured to each other, then they can also cancel out some negative effects of the inertia of mass on the cone...

Okay, so my questions are as follows:

1) How significant are the benefits of using this configuration?

2) Do the subs need to share the same air space in the enclosure, or could I have two enclosures secured to each other with the woofers firing at each other?

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[aphinney 10+ year member]

i think they have to share the same air space

 

[Pete 10+ year member]

the subs do need to share the same air space.

If i understand your explanation correctly, then you can think of this setup the same as isobaric with the only difference being the one inverted sub.

Personally I like isobaric enclosures.

 

[Urmama 10+ year member]

1) barely if at all noticable

2)yes, same airspace

as far as the inertia mass of the cone, it would have no effect, isobarik would give you 2 motors with the same radiating area, but not inverting one of your subs