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Author Topic: Noble 4  (Read 5265 times)

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OJneg

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Re: Noble 4
« Reply #20 on: June 08, 2014, 03:57:10 PM »
Quote from: ultrabike on June 08, 2014, 07:40:18 AM

I will not currently apply it because I'm not convinced its correct, and because I have a feeling that different ear models might yield different results. I feel it's proly best to use FR results relative to other FR results from a similar rig and methodology (specially for IEMs).

Agreed on that count.

Although it would still be interesting to see what the curves look like once compensated.
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ultrabike

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Re: Noble 4
« Reply #21 on: June 08, 2014, 06:41:07 PM »
Sure, this is what I get for the Noble 4 (20Hz to 10kHz):



However, I don't trust that compensation. It makes it seem as if the Noble 4 was more loss in the upper midrange and lower treble than I think it should (if at all). Will have to work some more on it...
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OJneg

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Re: Noble 4
« Reply #22 on: June 08, 2014, 07:05:29 PM »
Will be very interesting to see how your plots look w/ compensation for a more known quantity, like the ER4S or UERM.
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tomscy2000

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Re: Noble 4
« Reply #23 on: August 13, 2014, 04:03:12 PM »





Not my measurements; the guy who did them is a manufacturer so he doesn't want any conflict of interests. I have the original PIR files, so I can output them any way I want.

Looks okay, pretty much what I expected; for accuracy the 2.5k peak should be larger, at least 3 dB higher but this is a mid-centric IEM anyway so whatever, and the 6-7k peak is definitely there but isn't as big --- that peak in the TWFK always gets exaggerated in the IEC711. Bandwidth is decent for BA.

Anyway, a much better improvement over the 4.Ai.
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shotgunshane

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Re: Noble 4
« Reply #24 on: August 13, 2014, 04:17:03 PM »
Yeah, I definitely heard that peak. It ruined the treble tonality and timbre for me. And that bass looks awfully similar to the ER-4S. I heard them pretty similar there with the noble having a bit more mid bass than the ety. But definitely significantly better overall than the heir 4.ai
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tomscy2000

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Re: Noble 4
« Reply #25 on: August 13, 2014, 04:33:24 PM »
Bass roll-off is greater in the ER4. It probably just looks similar due to the way the graph is rendered, but in a direct overlay, the rolloff in the ER4S should be steeper. But yes, there should definitely be more mid-bass presence.

In the custom 4C, the treble peak is surprisingly tame, probably less than half of what you see on the graph.
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ultrabike

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Re: Noble 4
« Reply #26 on: August 13, 2014, 05:11:15 PM »
I'll overlay the ER4S and Noble 4s FRs. I also have another set of Noble 4s and will take some measures tonite.
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Kunlun

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Re: Noble 4
« Reply #27 on: August 13, 2014, 06:52:19 PM »
Quote from: tomscy2000 on August 13, 2014, 04:33:24 PM

In the custom 4C, the treble peak is surprisingly tame, probably less than half of what you see on the graph.

Agreed, it's less of a peak on my custom 4C.
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ultrabike

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Re: Noble 4
« Reply #28 on: August 14, 2014, 04:58:51 AM »
So... Noble 4 vs ER4S (previous uncompensated FRs). The plots are lined up ~1kHz

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tomscy2000

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Re: Noble 4
« Reply #29 on: August 14, 2014, 09:09:36 AM »
IME, it should probably be normalized to a point of "inflection" below the effect of canal gain starts at around 600 Hz (even though your rig doesn't account for canal gain), so here it should probably be 400 Hz or so. The ER4S rolls off slightly steeper even when normalized to 400 Hz. It doesn't look like much, but when the SPL at midrange frequencies exceeds threshold levels, the lows drop off below the realm of threshold of hearing for the sub-bass more easily for the ER4S.
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