I got the smaller air cores on both sides now. Do coils need to break in? Sounded a little tight at first. Opening now after a couple hours. I got a couple sizes that will allow fine tuning. I'll need to measure to see the changes.
With the iron cores gone, the bass is much cleaner, the whole speaker sounds much better, and plays louder. The iron cores seemed to really suck out the life and the volume.
So now, of course, with cleaner bass I can hear new LF flaws.
The bass seems slightly resonant, chesty on alto girls and guitar low notes, etc. The box is sized for Q .57 with the Eminence Deltalite 2512, and it's way too big for this AE TD12X driver.
EPB of this driver is 110. Probably shouldn't be sealed anyway. But that wouldn't make it too warm in the mid bass.
The simulated AE TD12X needs 30 liters for Q .7, 50 liters for Q .57, 75 liters for Q.5. The box is currently at 120 liters, which spells Q .43
What is the sonic penalty of too large sealed box? I've searched hi and lo for the answer. Grant me this wisdom, mighty Oracle.
Also, there is minimal fill inside the sealed box now. Usually sealed boxes will have more fill, sometimes even stuffed full. I don't need more volume, so I didn't bother filling it with fluff. But maybe more is necessary to damp the driver better?
More stuffing
and smaller box?
Thanks