Hi everyone, I have some thoughts/questions about creating filters for my new speakers. I built the kingroy mk3 kit by seas and want to use the fir capability of the hypex amps. Right now I use the dsp preset 1 provided by Seas. I used the mmm technique to measure a sphere around my listening position and had rew generate filters based on that measurement. I used var smoothing to avoid overcorrection in higher frequencies. Im quite happy with the results above ca. 200hz the deviation from my target curve is less than +-2 
Now about the FIR Filters, the Hypex dsp has 1500taps @93750hz on each output, OR 4500 on the Input. The plan is to use the hfd filters to make the speaker as flat as possible with measurements taken outside and then using the input eq to do some room correction with the available 9 biquads.
For the Crossover between Mid and Hi 1500taps are enough for steep 96db/oct Filters + Box Correction, but for the bass/mid crossover @ 215hz the taps are not sufficient, you have to go to at least 600hz with 48db/oct slope for the filter to be accurate down to the noise floor. I tried the high crossover but it didnt sound nice, crossover at 215hz sounds better to me.
4500 taps are enough for iir crossover lineariziation + box correction filters even on the bass @ 35hz
So its either iir crossovers + fir correction for a fully linear phase system (if you leave out the subsonic filter) with a delay of ca. 22ms
or
iir crossover for bass/mid and fir crossover + box correction for mid hi, so linear phase above ca. 250Hz and a delay of 8ms
Which configuration do you think would be preferable? My use case is listening to music, watching movies, djing, music production and mastering. For djing and music production with real instruments 10ms is the max delay i can tolerate.
Now about the FIR Filters, the Hypex dsp has 1500taps @93750hz on each output, OR 4500 on the Input. The plan is to use the hfd filters to make the speaker as flat as possible with measurements taken outside and then using the input eq to do some room correction with the available 9 biquads.
For the Crossover between Mid and Hi 1500taps are enough for steep 96db/oct Filters + Box Correction, but for the bass/mid crossover @ 215hz the taps are not sufficient, you have to go to at least 600hz with 48db/oct slope for the filter to be accurate down to the noise floor. I tried the high crossover but it didnt sound nice, crossover at 215hz sounds better to me.
4500 taps are enough for iir crossover lineariziation + box correction filters even on the bass @ 35hz
So its either iir crossovers + fir correction for a fully linear phase system (if you leave out the subsonic filter) with a delay of ca. 22ms
or
iir crossover for bass/mid and fir crossover + box correction for mid hi, so linear phase above ca. 250Hz and a delay of 8ms
Which configuration do you think would be preferable? My use case is listening to music, watching movies, djing, music production and mastering. For djing and music production with real instruments 10ms is the max delay i can tolerate.