Yes. Althou the Q can go down with a peak at the same height but broadened at the base.
dave
Thanks Dave, I guess some of what I was curious about is this: How do you know when you have tuned correctly ? Will the impedance at resonance simply stop dropping or can it actually begin to increase ? I would think the former but am not sure. Thanks.
The Qtc cannot go lower than the driver's Qts for certain. The way I did it, I did not look to maximize the impedance curve's flatness, but stopped when I had the desired Qtc, 0.65-0.7 was my aim. I guess at some point, if you try to go too far and remove too much resistive material, you will start to see a bass-reflex behavior, that would be my guess.
IG
IG
If the lower BR peak starts to return that is certainly an indication that you are going too far.
Qt = 1/(1/Qe+1/Qm).
The aperiodic port is affecting Qm.
Under voltage drive Qe dominates. Under current drive Qm dominates.
dave
Qt = 1/(1/Qe+1/Qm).
The aperiodic port is affecting Qm.
Under voltage drive Qe dominates. Under current drive Qm dominates.
dave
I'm learning as much as you here! 🙂
I placed the speakers better in my room and listened to some well-recorded/mastered stuff, Patricia Barber, and it sounded really good, even with no EQ (used to simulate BSC). Tried some dance music as well, David Guetta, and they did well enough; but I did hold back on the SPL to give them a chance. Looking forward to try other stuff I have on them!
IG
BTW, did you ever come accross any AD9710, wether in commercial or DIY boxes during this period?
IG
No. But i did go thru 3 pair of the similar 12" that came out of the ceiling of a federal government office,
dave
dave
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