🚀 go-pugleaf

On Tue, 26 Mar 2002 07:21:12 +0000, John Woodgate
<jmw@jmwa.demon.co.uk> wrote:

>I read in sci.electronics.design that Adam Seychell
><aseychell@vet.com.au> wrote (in <21a524b0.0203252126.7e2b7297@posting.g
>oogle.com>) about 'DSP for audio work', on Mon, 25 Mar 2002:
>>I'm interested in how you plan to design the crossovers.  Will you
>>measure the frequency response of each individual driver and synthesis
>>an FIR to obtain a flat frequency response transition between the two
>>drivers ?
>
>That interests me too. I get the impression that there is a lot of
>concern for precise amplitude and phase responses, but crossover
>frequencies of 250 Hz and 3 kHz are assumed to work for all 3-way
>systems.
>-- 

Yes phase response is obviously important for any crossover design.
This is because it determines how the drivers acoustic outputs will
sum for on-axis and vertically off-axis positions.

My driver equalisation filters will be done with minimum phase FIR
filters.  This is because drive units are essentially minumum phase
devices.  

From my experience designing passive crossovers, I know that accurate
frequency response is very important.. especailly for a range of
off-axis positions.  IMO, Time domain response is less important but
shouldn't be completely ignored.

See:
http://www.geocities.com/john_wr2000/dspproj2.htm

best regards,
Johnny.