Is DEQX a game changer?

Al, outdoor measurement is mandatory, IMO. With the help of two people, we moved TAD Reference1 (almost 400 lb apiece) and four monoblock amps from my listening room to my driveway. We used a dolly, easily purchased on the internet. If you are willing to invest the time and cash on DEQX, you really owe this to yourself.

Al,

Were you to decide to undertake the task I would gladly volunteer to help with the schlepping. PRoblem is I do not live very close. Maybe there are some other strong and trustworthy folks out there who live a bit closer that might be willing to lend a hand as well if it comes to that.

Psag and Mapman, thanks very much.

Obviously I don't have to finalize any decisions just now, and we'll see how things develop in the coming weeks. But while I certainly value the experience-based inputs from Drewan and Psag, and while it's certainly clear that realizing the full potential of DEQX requires an essentially anechoic measurement, what doesn't seem clear (and probably can't be, given how many application-specific variables are involved), is the degree of compromise that will result in any given situation from doing the measurement indoors.

Obviously Drewan and Psag are strong advocates of outdoor measurement. On the other hand, though, in this post by Forrestc, who also seems very experienced, indoor measurement is described as "by no means a deal breaker." And in Kal's (Kr4's) review in Stereophile the speakers he calibrated on his own, and I presume also the other pair he used, which were calibrated remotely by DEQX, were done indoors. The pair he did himself, with good results, were done with the impulse response truncated at only 5.5 ms after the direct sound arrival, and with the correction performed down to 200 and 150 Hz in the two profiles he created, with the latter even being slightly preferred!

Perhaps one relevant variable influencing the degree of compromise resulting from indoor measurement, btw, is how much correction is needed by the particular speakers that are involved. In that regard I've noted that the impulse and step responses I've measured on my speakers, during the first few tenths of a millisecond or so and with no panels near them or the mic, seem to me to look pretty good. Relative, that is, to the step response plots I've seen JA present in Stereophile in conjunction with reviews of other floor-standing speakers which do not use first order crossovers.

So we shall see. Thanks again for your inputs.

Best regards,
-- Al

I'd love to hear other folks POV on the cutoff frequency that worked best for their speaker calibration.

I can only report my own experience and with music playing, it sounds totally believable from the outdoor measurements. Using the same settings from calibration to configuration with the best indoor readings I could achieve, music and especially mid-bass had a slight hollow-nasal quality to it and was not as natural

I am using Open baffle speakers which I appreciate are very different to those being used by Al, Bruce etc but this quality was also present in the full range Shaninians when comparisons were originally made

I feel at a loss to convey with words just how close to perfect a well set up DEQX enabled system can get. For sure there are still going to be a lot of very satisfied users provided measurements are taken to the optimum in the environment available