GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Time alignment of drivers

Post Subject: Time alignment of drivers and crossover slopesPosted by noviygera on: 8/23/2010

I think clearing this up this may be of benefit to other users who are building multi-way horns.

Let's say I've got two horns mounted on a frame. There's a high horn above and a mid horn below and they are physically time aligned, meaning the magnets of the drivers are about at the same vertical axis.

I want to cross them over (either passive or active or line level passive) at 2kHz.

I want to try 6db/octave slopes and 12 db/octave slopes for SQ comparisons sake.

The sound wavelength @ 2kHz is about 7 inches. 6db crossover have a 90 deg. phase shift; 12db crossover have a 180 deg. phase shift.

And the QUESTION IS:
Switching between 6db and 12db crossovers slopes (and other slopes like 18 and 24db), do I also need to physically move the mid and high horns in relation to each other to have proper time alignment? Or should I leave the horns the way they are?

thank you,
Herman

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