I just spent a week of on off music/movie sessions retuning my theater with Dirac after upgrading to M5OW surrounds. Many filters were tested using their 17 point measure process on a PC.
In a fully treated room, 1db changes in the vocal range are very audible and can make or break the realism of playback. I found that tweaking things in room with Dirac was far more relevant than what speaker was deployed.
The most important spec. aspects are power handling, distortion, dispersion and bandwidth. The rest can be tweaked these days using dsp with results that fool the senses in room.
Anechoic graphs are a great yardstick to compare products. These days you can make pretty well any speaker sound as you like with DSP barring pushing them into distortion while tweaking. -Not an issue for Axiom products.
