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Get familiar with the reaction system: Introducing the Reaction System
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If you’re talking about the peak above shown here:
Reference:
https://hificompass.com/en/speakers/measurements/dayton-audio/dayton-audio-rs52an-8
You can take care of it with DSP.
You can take care of it with a passive notch filter in parallel with the driver.
You can take care of it with a passive notch filter in series with the driver input. This has added advantage is that it will also suppress the harmonic distortion components marked in blue and purple below-
This has been done for many years but recently documented by Lars@Purifi
Reference:
https://purifi-audio.com/blog/app-notes-2/low-distortion-filter-for-ptt6-5x04-naa-11
"The RS52ANs sound considerably cleaner and more open when suppressing the top end breakup, even if its well outside the passband after the crossover"
From post #249 --> https://www.diyaudio.com/community/threads/the-dome-midrange-thread.407105/page-13#post-7565435
DSP won't fix that . . .
DATS V3 data for two current production RS52AN-8 mid domes after 48 hours of break-in at 325 Hz attached at link below - link good until 1-20-24 for those interested.
https://we.tl/t-LilFJ8IANw
Hi Steve,
I can’t seem to access those files.
Do you mind posting screenshots of what you see in DATS?
Please show a zoomed impedance trace, eg. Y axis of 10 ohms.
Windows Key-Shift-S to do screenshot.
Thanks for checking-in, Thanh.
Z data in .txt export:
Fumbling around with on line calculator using opposite notch filter terminology
They [RS52AN-8] sound hissy & dull compared to the HiVi DMB-A's even when employing PEQ & killing all freq's above 4KHz and using steep XO slopes, so DSP cannot fix the SQ and it appears to be a resonance problem. [lending credence to Wolf's prior admonition(s) concerning resonance damping with passive components].
Hmmm.
The impedance plot suggests that there are two resonances:
This seems to similar to the one detected around 2020:
With this frequency response:
Please read this post; accounting for difference between the early production run circa 2008:
https://www.htguide.com/forum/forum/primetime-a-v/mission-possible-diy/driver-testing-discussion/32744-driver-evaluations-for-a-new-project?p=833366#post833366
And this post; documenting the change:
https://www.htguide.com/forum/forum/primetime-a-v/mission-possible-diy/driver-testing-discussion/32744-driver-evaluations-for-a-new-project?p=833367#post833367
This certainly complicates the issue…
PE never addressed that issue, either. Not to my knowledge, anyways. Pity - those mids have so much potential.
Steve, that is a parallel notch, as the parts are all in parallel with each other.
InDIYana Event Website
I think I will see if I can send them back to PE for a refund and get some other domes instead.
Life is too short to waste on broken toys . . .
Thanh - thanks again - you are consistently helpful and educational.
Steve,
If they are relatively new, I certainly hope they will.
Actually, even if they aren’t new, It certainly doesn’t meet the advertised claims (spec sheet)
PE takes anything back.
Return request sent to PE this afternoon with a link to this ^ thread.
Purchased 2 months ago and only got around to testing them last week.
I was hoping that the RS52AN-8's low Fs and metal domes would outshine the HiVi DMB-A's sufficiently to make me use them with the Fountek NeoCd3.5H Horn ribbon tweeters but, alas - it was not meant to be metal on metal . . .
Hear anything back from them?
Got bounced around for a bit but they issued a Return authorization this morning and will send a return shipping label shortly.
Thanks for asking, JR.