Best crossover point between 400hz and 1000hz?

[Music is life]

When a passive crossover is Necessary and time alignment is Not Possible. Is there a less problematic to the ears frequency between 400hz and 1000hz to cross over at?

[killa]

There are too many variables to just pick a crossover frequency. The best crossover frequency will depend on the drivers being used along with the baffle they are on. IMO in a properly designed crossover there really no problematic area if the drivers are up to task.

[billfitzmaurice]

Anything below 800Hz can be an issue, so it's an area to be avoided.

[EarlK]

When a passive crossover is Necessary and time alignment is Not Possible. Is there a less problematic to the ears frequency between 400hz and 1000hz to cross over at?

My advice is to not make this choice strictly an intellectual exercise ( ie; let your ears also guide you ).

I listen to a lot of my favourite classical music through horns only ( using various compression drivers ) to assess the drivers ability in the lower octaves ( using various passive crossover topologies ).

Classical music can sound surprisingly full range with a second order 750 hz crossover point ( & I can hear the grunge start to take hold when using a simple first order with smaller diaphragmed drivers ).

[killa]

Anything below 800Hz can be an issue, so it's an area to be avoided.

Parts start costing more the lower you go too.

[Music is life]

Forgot to say that in this application the midrange (horn) will be in front of the midbass (horn) and not behind it, if that makes a difference.

[philthien]

Anything below 800Hz can be an issue, so it's an area to be avoided.

Can you elaborate?

[EarlK]

Forgot to say that in this application the midrange (horn) will be in front of the midbass (horn) and not behind it, if that makes a difference.

I'd advise you to at least align the voice coils belonging to the two different horn drivers ( that's way better than a kick in the pants ).

.

[Sydney]

There are too many variables to just pick a crossover frequency. The best crossover frequency will depend on the drivers being used along with the baffle they are on. IMO in a properly designed crossover there really no problematic area if the drivers are up to task.

Yeah and specifics* about the "midrange (horn) and the midbass (horn).

* Horn cutoff frequencies, Dispersion patterns of Horns

[billfitzmaurice]

Can you elaborate?

Time align is most critical in the 300-700Hz range, to the extent that it can be very audible when it's off, so if you lack the ability to time align either by physical placement or electronic means you're better off not crossing over there, choosing your drivers accordingly.

[Music is life]

The project for consideration will have a midbass with a 54" path length (about. folded horn with one wide turn). The midrange will be from 14 to 26" depending upon crossover and so then driver choice. The tweeter and midrange will be physically time aligned. The midrange and midbass cannot but will of course need to be in phase at crossover point.
Lowest possible crossover is 225 to 250hz. Hightest possible is 800hz maybe 1000hz.

Thanks for the input.

[fpitas]

An application like this is where an active digital system shines. Digital delay can be placed on the mid and tweeter so that all the drivers are time aligned.

[Music is life]

An application like this is where an active digital system shines. Digital delay can be placed on the mid and tweeter so that all the drivers are time aligned.

Indeed. I might be moving overseas in 2 or 3 years. Speakers, no problem even large horns, right in the container. Electronics often a problem with voltage difference. So that's a lot of amps and stuff, potentially the wrong voltage.

[lasse]

Time align is most critical in the 300-700Hz range, to the extent that it can be very audible when it's off, so if you lack the ability to time align either by physical placement or electronic means you're better off not crossing over there, choosing your drivers accordingly.

[billfitzmaurice]

it would be interesting to leran more on Why this region is more vulnerable to cross in.

That's where our ears are most sensitive to the effects of delays between multiple sources.

And what to do IF you want to use a 10-12” woofer. 1000 Hz is much.....

Use a pair of eights instead.