I do not have any coils but I could get a pair. If I did put in one, which frequency range will it affect most?
It will put down the whole hump range but it will probably weaken the 2-3k area too. Better get 0.5mH so you can start heavy and if too much, unwind progressively. It will be a judicious point for your set up where you will feel balance is best for you.
Yes I agree. And it seem to me that extra bracing could not be the cause since it is over a rather wide range. And a smaller box volume that I might have compared with the original should not affect that high in frequency. Maybe try more stuffing but I suspect it would take a lot of it to get that level down?
Yes I will try that first. If I get it down a little without losing bass it could be enough.
Good night Nick, I appreciate your help.
Good night Nick, I appreciate your help.
Maybe my stiffening of the box made the middle range to pop out a little since less energy is stored in it.
If you take several RTA graphs on a window around listening position from one speaker playing, then the other, and then average them out, then you will know the normalized room response. Its tedious.
I will take it slow beginning with more stuffing first. But I am concerned it will do a very small difference since I read online that the type I am using (polyester wool) is not very effective in the middle range. But trying it out will tell. I will post my results tonight. I am in no hurry so I can try everything else before I even consider adding that extra coil.
Get cheap 3.5mH coils maybe with high saturation ferromagnetic core to avoid high RDC in logical price and start measuring and unwinding until best in room possible value for the pair and your preference is the most drastic.
I doubled the amount of stuffing behind woofer and measured like before but I have the speakers a little less toe-in than I used to (since it almost looked the same in my post yesterday).
First pic is as mentioned above, second I opened the door to my sleeping room (watch the bass peak) and last a close measuring just between tweeter and woofer at 0.35m distance.
First pic is as mentioned above, second I opened the door to my sleeping room (watch the bass peak) and last a close measuring just between tweeter and woofer at 0.35m distance.
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Well it sounds very similar in my ears but it is better when I open that door since that bass peak is less. Maybe maybe a little calmer in middle range but I am not sure. I will try one last thing: trying to dampen walls with all stuff I can get on the walls and measure again, brb.
Nah it did not work, looks about the same. It seems like that polyester wool is not very effective damping mids.
Best to leave it for now, I get nowhere at the moment 🙁. And who knows, maybe most of it is room related after all. But they sound good with most music.
Some good news: I listened to Norah Jones with headphones to compare with the speakers and I could actually hear some "shouting/hardness/forwardness" even with headphones in the same places as with the speakers. Last time I compared it was a big difference (old position of speakers in the other direction). My memory said it had none of that problem with headphones but it was actually there but since the difference was big I probably believed it had no "shouting" (wrong!) 🙂.
In wide angles above its pistonic range the 8inch is weak for dispersion. Letting it have bit more direct it offsets it somehow.
I kept about half of that extra stuffing since It might have calmed it down a little and compensate slightly for my extra bracing stealing volume.
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