Q about placing tweeter below midbass

[Bill poster]

Designing a 2 way and may need to position midbass above tweeter. Tweeter will be in time aligned waveguide. Q I see most if not all designs with tweeter below have no baffle tilt. Will a baffle tilt of 4 degrees be ok? Height with stands will be 90cm, tweeter height around 70cm.

 

[boswald]

The waveguide does not time-align the tweeter. You do.
Arrange the speaker so that the acoustic centers are equidistant from your ears.


You have made some design decisions and can now adjust for them.
It'll be fine.

 

[Zuhl]

It's not really necessary; though mine are tilted slightly due to how close I am to them (small room).

The important thing is to get the offset right when designing your crossover. Get a tape measure and measure from the listening position. That will give you the correct offset for each driver.

 

[eriksquires]

It's fine.



For the most accurate simulation you should put the mic on the mid-bass axis, and then usue interferometry to assess the acoustic distance of the tweeter.



Usually you set the mid-bass as behind the tweeter, this will be the opposite.



Best,


E

 

[Bill poster]

Thanks guys. Decided not to go that route in the end, will set midbass centrally on baffle.

 

[rabbitz]

In the past, tweeter below the midwoofer was done on a lot of speakers that used BW1 (norm polarity) and BW3 (rev polarity) to compensate for the downward polar tilt (approx -15°). Reversing the drivers can give an approx +15° tilt if offsets have been taken into account. This gives a ZDP (zero delay plane) close to 0°.

Hardly ever see it these days.