Hi all!
I've been measuring and re-measuring things to get a clue as to why my Natalies don't sound good at all, despite following the original designs as closely as I could.
Some of you know my speakers have a sharp peak at 1700 Hz, almost 1KHz wide.
I started by finding out that the tweeters were to blame, so I chamfered the baffles (they had 90° angles). The FR varied a bit, but the peak was still there.
I started by creating a felt mask around the tweeter, the size of the baffle. Things changed a bit, but the peak was still there.
After a week or so of thinking about it, I covered the woofers with pillows and re-measured.
Bingo (?). The peak was gone, and FR was as flat as I could possibly expect.
I have included three measurements (without any diffraction treatment, with felt on the baffle, and with woofers covered).
I now know what's wrong, but have no clue as to how to fix the problem (if it can be fixed). This is the first time I've had this problem. I'd suppose the phase plug and the size of the drivers are part of the problem, but, AFAIK, there's no solution to my problem other than a very complex crossover. I already tried that, and I thought the sound was dull and dead (although FR was completely flat).
What can I do? The only thing I can think of is sink the woofers even deeper on the baffle (they may be 0.5 ~ 1mm ahead of the tweeter), and that's it...
Thanks for any help!
I've been measuring and re-measuring things to get a clue as to why my Natalies don't sound good at all, despite following the original designs as closely as I could.
Some of you know my speakers have a sharp peak at 1700 Hz, almost 1KHz wide.
I started by finding out that the tweeters were to blame, so I chamfered the baffles (they had 90° angles). The FR varied a bit, but the peak was still there.
I started by creating a felt mask around the tweeter, the size of the baffle. Things changed a bit, but the peak was still there.
After a week or so of thinking about it, I covered the woofers with pillows and re-measured.
Bingo (?). The peak was gone, and FR was as flat as I could possibly expect.
I have included three measurements (without any diffraction treatment, with felt on the baffle, and with woofers covered).
I now know what's wrong, but have no clue as to how to fix the problem (if it can be fixed). This is the first time I've had this problem. I'd suppose the phase plug and the size of the drivers are part of the problem, but, AFAIK, there's no solution to my problem other than a very complex crossover. I already tried that, and I thought the sound was dull and dead (although FR was completely flat).
What can I do? The only thing I can think of is sink the woofers even deeper on the baffle (they may be 0.5 ~ 1mm ahead of the tweeter), and that's it...
Thanks for any help!
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