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guy sergeant wrote:

7. 4.8" x 4.8"

Hm, and you used 12” driver with 4.8" x 4.8" thought?  With you look for 6”-8” driver and Fs drivers. I know it would be very hard to find them with near 100dB sensitivity…

guy sergeant wrote:

… how do you measure the Macondo, from your listening position?

Only, I absolutely refuse even to look at any other measurements.

guy sergeant wrote:

I'll try to do the time alignment more exactly when I put this system back together here this weekend. I've been too busy recently. I was interested to read JLH's views on this on Audio Asylum.  http://www.audioasylum.com/forums/hug/messages/14/148141.html  Not sure what to make of that discussion.

What JLH says is correct but only enough to satisfy interest in the subject of the Morons of the “Dan_ed” level. John talks about acoustic alignment that is the only aliment that counts. Still, acoustic alignment is a way to monitor and to measure alignment but alignment itself is still done mechanically, by sliding drivers against each other. If cause no one line up the throats, people align diagrams refracted after crossover, or acoustic center of the driver radiation.  So, I do not see anything wrong or conflicting in what John said. I would not agree that time from diagram to listener means nothing but he was saying it as an illustration to educate the Morons that alignment needed to be measured acoustically not with a ruler. Ironically with a certain experience it might be measured by distance and the acoustic measurement might be discarded. But to do it one needs to know how the given channel and the given crossover measured time-wise and then if you have high precision positioning table then you can do aliment by distance only. Where I disagree with John is in his comment that horn’s phase response changes with frequency. Of course it changes but it is irrelevant for time alignment a multi-horn system.

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