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Author Topic: Ultimate Ears In-Ear Reference Monitor UERM Measurements (V2)  (Read 11449 times)

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arnaud

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #10 on: July 12, 2012, 02:10:16 PM »
Ok, that explains. So, from that standpoint, the UERM is fairly close to your ideal iem then it seems! I believe you do the same for your regular headphone measurements with your original baffle plate, right?

The only thing that I could not get my head around is how you calibrated your self made couplers. I think I now understood how you did it: using test tones and loudness matching a headphone / earphone against your reference desktop speaker rig, then measuring that equalized headphone (to your ears, for your setup) through your couplers in order to set the "0dB" line.

Very convoluted process but I don't see any other way if you're not using a dummy with calibration chart...
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arnaud

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #11 on: July 12, 2012, 08:57:41 PM »
Marv, thanks for the honest reply. As I told you before when we were working out the CSD calculator, in some ways you are so much more ingenious than many engineers I deal with in my work, you've missed a carrier man ! Or, you're probably an even smarter
programmer  :)p1

I actually place myself almost in the box of the self-appointed expert with more questions after every answer though  :-00 . I may have a fairly good bit of experience in all sorts of testing and simulations in the field of vibro-acoustics. But when it comes to headphones, I still consider myself as close to clueless and it probably shows up in the questions. I appreciate your effort to share your findings.

Cheers,
Arnaud
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burnspbesq

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #12 on: January 29, 2013, 01:33:46 AM »
Has anyone seen an impedance vs. frequency plot for the UERM?

Reason I'm asking has to do with the AK100.  In theory, it and its 22 ohm output impedance should be a questionable match for the UERM (nominal impedance 21 ohm@1kHz).  However, Chris at CA used UE11 Pros in his evaluation of the AK100, liked it a lot, and didn't mention any of the potential issues that one would expect if there were a bad impedance mismatch.  Which is especially surprising since, when Stereophile measured the UE11 Pro, it found the impedance to be right around 10 ohm from 50 Hz to about 800 Hz before a spike to the published spec of 18 ohm @ 1kHz.

I suppose I could just buy the thing, try it with my UERM, and if I don't like what I'm hearing in ways that are consistent with an impedance mismatch, send it off to RWA to be modded.  If there isn't a problem, I saved $200 vs. the cost of a pre-modded RWAK 100.

Decisions, decisions.  I hate existential anguish!   :vomit:
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Marvey

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #13 on: January 29, 2013, 03:53:13 AM »
I'll take a measurement when I get a chance. Work suddenly got busy for me.
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burnspbesq

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #14 on: January 29, 2013, 06:37:53 AM »
Quote from: purrin on January 29, 2013, 03:53:13 AM
I'll take a measurement when I get a chance. Work suddenly got busy for me.

Much appreciated.  No rush.  Clients come first (says the guy who's still in the office at 22:37).
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uelover

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #15 on: March 31, 2013, 01:00:42 PM »
Anyone could comment on how similar (or dissimilar) the UERM is with regard to Etymotic ER4P?

I am not particularly impressed with the C4 and may just go for the UERM.
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MuppetFace

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #16 on: March 31, 2013, 01:52:45 PM »
Considered the F111?
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uelover

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #17 on: March 31, 2013, 03:01:04 PM »
Quote from: MuppetFace on March 31, 2013, 01:52:45 PM
Considered the F111?

I did but I am worried about potential fit issue as I had one with the TG!334 which eventually led me to sell it away. Prefer a CIEM if possible.
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dtrewwye

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #18 on: March 31, 2013, 03:11:15 PM »
Quote from: uelover on March 31, 2013, 01:00:42 PM
Anyone could comment on how similar (or dissimilar) the UERM is with regard to Etymotic ER4P?

I am not particularly impressed with the C4 and may just go for the UERM.

uelover, besides the C4's 4khz suckout you perceived and the long wait times...what else do you not like about it?
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uelover

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Re: Ultimate Ears In-Ear Reference Monitor UERM Measurements
« Reply #19 on: March 31, 2013, 11:08:15 PM »
Quote from: dtrewwye on March 31, 2013, 03:11:15 PM
Quote from: uelover on March 31, 2013, 01:00:42 PM
Anyone could comment on how similar (or dissimilar) the UERM is with regard to Etymotic ER4P?

I am not particularly impressed with the C4 and may just go for the UERM.

uelover, besides the C4's 4khz suckout you perceived and the long wait times...what else do you not like about it?

Three things regarding the sound:
1) In congested passage, separations is not the best and sometimes instruments may get lumped together, making it hard to differentiate one from the other.
2) The highs of the C4 is recessed relative to the mids and lows, and especially around 4khz. This negatively affected the tonality of vocals and instruments.
3) Timbre on the TG!334 and Tzar 350 is better.
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