Crossing bipole/dipole?

[theAnonymous1]

What things need to be considered when crossing a bipole with a dipole?

I will be using a 6.5" midrange/midbass (bipole setup) with dipole highs.The XO point will be ~2k.

[Rudolf]

A bipole is a monopole without baffle step issues, IMHO.
Combining a monopole with a dipole results in a cardioid behaviour. JohnK provides some diagrams which show how the transition from xpole to ypole happens.
Things get complicated for a crossover of 2 kHz, corresponding to a wavelength of 17 cm. Your bipole sources will be wider apart than that, so you need to keep the front and back time delay between the dipole source and the two bipole sources in mind.

Rudolf

[theAnonymous1]

I will be using DSP software with time correction (allocator), so that shouldn't be too much of an issue.

Without knowing anything else about the drivers, would it be possible to recommend a xover slope?

Would I be better off not using a bipole configuration and adjust for baffle step instead?

[Rudolf]

It's not the same problem, but should give you the idea:
Offsetting a dipole driver is something which can not be corrected with time delay. Your dipole tweeter should be equidistant from both bipole drivers.

Those location issues would not occur if you combine bipole woofers with dipole mids (talking about 200 Hz = 1.7 m wavelength).

Since you are using DSP already: How about implementing your double 6.5" as a dipole midrange from 200 Hz to 2 kHz in an MTM config?

[theAnonymous1]

Originally Posted by Rudolf

Your dipole tweeter should be equidistant from both bipole drivers.

Good, I can center it exactly between them with no problem.

I would like to keep the mid drivers in a sealed box so they integrate better with the subs I will be using. Plus, the drivers have a very low Q. MTM won't work because of how large the "tweeter" is.

Thank you for you input Rudolf.