Room correction - what device works best?

Let's also not overlook the additional benefits of the DEQX compared to other options. The speaker correction that occurs before the room is taken into account. Tho Kal also seemed to find that the room correction wasn't making as significant a difference as the Dirac system did. However he also didn't take advantage of the DEQXpert service to see if that could do more for the speakers and roo effects.

Thank you for that excellent clarification.

Thru DEQX time alignment can be achieved with speakers with passive crossovers. As it measures the response to test tones, it digitally adjusts the arrival times of all frequencies measured. So differences between drivers as well as any time arrival differences that might be produced by a particular driver itself.

But is DIRAC computationally doing all that the DEQX is, or is it just a well-implemented digital EQ?

To the question of time alignment for speakers with passive crossovers, these quotes from the PreMate review should clarify things. From the Positive Feedback review:

... it corrects for …."the distortion that all speakers make—electro-mechanical devices that they are—and offer room compensation as an added extra. While righting frequency-response errors as other units do, they also uniquely correct critical timing errors by adjusting thousands of frequency groups so that they arrive on time.

"In correcting the speakers—before the room—our comprehensive DEQX-Cal™ software generates correction filters for phase, timing coherence and frequency-response. Only then does DEQX-Cal measure from the listening area for room correction.

"It corrects speaker frequency-response and timing errors by adjusting thousands of frequency groups, depending on your speakers' measure­ments, so that they arrive at the correct time."

Doesn't get much clearer than that.

Kal, or anyone else who may know, how does the speaker correction of Dirac compare to DEQX?

Acousticfrontiers,

Can you explain what the benefits are from separating room and speakers into 2 distinct steps? From what I can tell from the Dirac website, they are also doing some speaker correction, which appears to be from the listening position in the listening room.

Thanks for your helpful clarifications.