Support Forums Forums FIR Designer Support FIR Filter Design for Loudspeaker Equalization – FAQ Reply To: FIR Filter Design for Loudspeaker Equalization – FAQ

EA Support
14 July 2020 at 10:38 pm #223

>> Is it correct to assume that this loudspeaker is displaying non-minimum phase behavior
>> around the crossover region when one looks at the 2-nd order all-pass response of its
>> phase response?

Yes.

>> Can the phase adjustments being done around the crossover region, to flatten the phase
>> response, be deemed to be “maximum phase” corrections seeing that we are inverting an
>> all-pass response?

Yes. But remember this is just one loudspeaker. Each loudspeaker is different.

>> Is the flattening of both the magnitude (EQ boosting) and phase response around the
>> crossover region not going to introduce audible artifacts like pre-ringing?

Maybe. Linear-phase brick-wall crossovers also have pre-ringing but it’s rare that people say they think they can hear it.

>> Can the same EQ concepts be readily applied in correcting the room transfer function
>> displaying non-minimum phase characteristics at the listening/measurement position?

Yes but I’d suggest doing a literature search on the topics of room impulse response correction and inverting room impulse responses; maybe in the Audio Engineering Society resource library.

Best,
EA Support