[quote]
Quote Originally Posted by Earl K View Post
BTW, have you checked the polarity of those 4 drivers to make sure the cones move in the correct direction
No I haven't but I will.I'll let you know my findings.
Since you have (4) 288C drivers, why not put diaphragm #2 into either driver #3 or #4, to see if you can improve its' HF response to match driver #1 ?
They are completely different diaphrams,drivers 3 & 4 are 299-8A's w/diaphrams 25884.I haven't measured them yet though and think it would be a good idea to see how they measure on the 511E's.But the 288's w/23763 diaphrams sound real nice on the 511E for the short time I listened to them.They were real nice sounding.

I'm going to remeasure the 416's too.As the measurements don't seem right for the condition they are in.But looks can be deceiving as we all know.I'm going to do the Vas measurement differently as well.It will be good to see if I'm getting consistent results for one.And hoping for much closer to spec results for another.But even as they are, GM and Pano think I will still have an Above Average Sounding System due to high efficiency of the system.And with the size of the boxes plus the corner loading I should still be getting some great Low Bass response. Thanks Earl !