What Effect Does Woof 2 Tweet Placement have on Xo

[bruhthakuga]

Does the distance from woofer to tweeter also the fact that the tweeter and the port tube is not in the center of the baffle like the woofer make much differance on XO network values and overall sound?

I am going to build a pair of temporary enclosures for my car speakers till I fab the fiberglass perms, I don't want to make very large boxes as they will be sitting on the back seats so I want to arranged the recomended volume in a more stout way which will call for closer proximity of woofer, tweeter and port.

[damkor]

The port doesn't matter so much, but certainly the tweeter and woofer should be as close together as possible. Irregardlessfully of xover design, that is the rule.

[bruhthakuga]

Does it matter the woof and tweet are diaganal to each other but close? or side by side?

> The port doesn't matter so much, but
> certainly the tweeter and woofer should be
> as close together as possible.
> Irregardlessfully of xover design, that is
> the rule.

[Chris Roemer]

> Does it matter the woof and tweet are
> diaganal to each other but close? or side by
> side?

In general, it's a bad idea.

Sometimes a tweeter is horizontally offset on a baffle to make the distances to the left and right edge unequal, but aside from that, a vertical alignment is best. Even with well designed CC MtMs, the tweeter is raised as much as practical and GREAT lengths are made to cross AS LOW AS POSSIBLE.

[jeffhyder]

> Does the distance from woofer to tweeter
> also the fact that the tweeter and the port
> tube is not in the center of the baffle like
> the woofer make much differance on XO
> network values and overall sound?

> I am going to build a pair of temporary
> enclosures for my car speakers till I fab
> the fiberglass perms, I don't want to make
> very large boxes as they will be sitting on
> the back seats so I want to arranged the
> recomended volume in a more stout way which
> will call for closer proximity of woofer,
> tweeter and port.

I would say the closer the better in that situation due to the fact that the speakers would merge sooner, and 3 feet isnt much distance for the drivers to integrate sonically/

The farther apart they are the farther away from the cabinet the drivers blend or integrate.

On tweeter mid combos usually the closer the better. Helps with certain modulation diffraction and integration issues.

thats just my findings from my own practice so dont quote me on that but drivers need to integrate before they get to your ear or the sound bad sometimes.

[jeffhyder]

> I would say the closer the better in that
> situation due to the fact that the speakers
> would merge sooner, and 3 feet isnt much
> distance for the drivers to integrate
> sonically/

> The farther apart they are the farther away
> from the cabinet the drivers blend or
> integrate.

> On tweeter mid combos usually the closer the
> better. Helps with certain modulation
> diffraction and integration issues.

> thats just my findings from my own practice
> so dont quote me on that but drivers need to
> integrate before they get to your ear or the
> sound bad sometimes.

In a car I usually sit with a laptop and a sound presure meter and move individual drivers around until the db levels most closely match at my listening point.

Cars are hard to set up due to all the changes in contours and materials they are made of

Some are reflective and some are absorbitive so where the speaker is makes a major diff.

the high freqs matter even more as the lows are less directional.

[jeffhyder]

> Does it matter the woof and tweet are
> diaganal to each other but close? or side by
> side?

Diagonal would be more of a diffraction frequency concern due to the fact that instead of only haveing one distance from acoustic center to the cabinet edge you have more.

More frequencies will be affected by the two different distances from acoustic center to the edge.

I have in some cabinets designed the driver placement at offcenter locations to intentionally lower the db level of a frequency or two.

It takes a lot of math unless you have software to give you wavelength measurements vs. frequency.

that can sometimes determine how much baffle you want to have to the sides and above the drivers.

at some point you will have some diffraction loss,If you can build the cab to take advantage of it by reducing a peak in a mid or tweet its helpful otherwise you lose sound you want and the result is a few db loss at the frequencies whose wavelength exceeds the length from acoustic center of the driver to the edge of the cab.

I have designed cabs with semi round faces to make the diffraction loss gradual across a broader frequency range and had some interesting results. I dont care what women say, size matters.