Originally Posted by carp
My question is, how much can eq do? Can eq make my eD speakers sound every bit as good as the others or is that not possible since they don't have the same starting point? I would assume the answer is no or everyone would buy a cheap pair of speakers and then just eq to their liking.
EQ'ing loudspeakers, in the frequency range in which you are describing, is tricky business. If you could merely EQ the direct acoustic energy being reproduced by the loudspeaker, yes, EQ'ing would be OK. However, we're experiencing all the combined response of all the energy, direct and otherwise, when we listen to our systems indoors. What's missing in almost all such discussions is the mention of the time domain and phase response. We typically focus on the frequency domain, however unlocking the mystery of the time domain is where the gold is.
It's really beyond the scope of this discussion, (and I likely can't explain well anyway) however acoustically one divides the room into two parts. One part being above the transition, one below the transition, and of course the transition region. Technically, this is the Schroeder frequency. This is where the modal
to the ray
model. So EQing below the transition doesn't introduce the same phase problems that EQ'ing above the transition frequency does. One may be fixing one apparent issue, only to create another due to the associated wavelengths being small with regard to the bounded space.
All said, I'm not saying benefits can't be made.
The time domain. so much emphasis is given to the frequency domain, yet that's but half the picture. When the time domain examined, addressed and corrected, good things happen. Speed, fast tight bass, 3 dimensional imaging and coherency, lightning fast transients, these are some examples of what lies within the time domain.
Clearly, there are those much more qualified to expound on this topic. If one searches "minimum phase issues w/EQ" etc, there's an abundance of info.
Thanks again to all that participated in the shootout.