Recommended Seriously Efficient 15" Reflex Drivers

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

 Teunos wrote:

That's bad practice for choosing a crossover point. This is how you do it:Measure the dispersion in the horizontal plane. Choose a point where the dispersion of the two sections match and the power and spectral distribution matches the design of the cab. If this point is out of the band where one of the two sections would either need too much power or just sound bad, your design is wrong, period. Go back to the drawing board.
Assuming you have matched the horizontal dispersion by now, you need to choose the slopes. To avoid or minimize comb filtering in the vertical plane, the crossover slopes should always be as steep as possible. Higher order slopes give more phase distortion however so therefore a balance needs to be found. usually third or fourth order slopes will suffice. 
Note: using FIR filters will give you any slope you like, with no phase distortion whatsoever!

surely just ''picking'' crossover points that just sound good may work for a very specific location, but can per definition not sound good throughout a room.
Better use steeper slopes tweet if you get a normal response using shallow slopes on drivers from which the crossoverpoints are almost an octave removed from each other.
If the dip in the frequency response this creates is what you like, then do it on an eq. This way if you sometimes don't want this dip to be present, you just pull up the eq back to flat, instead of having to adjust crossovers.

Thank you Teun for the explanation.  we all here to learn a thing or two. thats whats this forum is about instead of just "lol".

Rish