AmberOzL
Headphoneus Supremus
- Joined
- Dec 18, 2012
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Sorry buddy. I don't have Mentor anymore
Why? Is it that bad so you sold it quickly?
Sorry buddy. I don't have Mentor anymore
Why? Is it that bad so you sold it quickly?
Basically yes, didn't feel the magic of 10 drivers..
Those UM supplied graphs are raw (no compensation) and, I think, fairly hastily done as a final check to make sure it's fairly accurate to the final sig. I've seen lots of slight variation from user to user on miracle and merlin customs. Probably a combination of each ciem being different and a hurried final test to get them out the door.
Supposedly the miracle is a very shallow V, so mentor should be slightly more in V shape.. I assume.
I haven't seen those graphs, but Tyll provides both uncompensated and compensated. V3 is based on Sonion 2300 for tweeter which have different response than TWFK from MentorForget it, I think every one of their graphs are raw. All their graphs have much peakier treble, even more so then the mentor. This is quite interesting because my 1964 V3's graphs is more like Tyll's graphs where it looks like a semi-circle and the high end looks to gradually roll off. I guess every company uses have their own compensation methods. I'm curious which is the more accurate one?
UM's measurements are made with IEC711 coupler so they are pretty accurate. Variations mentioned by shotgunshane are mostly due to IEM placement in the coupler.
Those graphs are raw data, no compensation.
Well, here are two V3 graphs. The top one is project's, and the bottom is mine. As you can see, the graphs looks different. Project's looks to roll off a bit earlier than mine, and both of ours have barely any extension beyond 10k. There is just slight dip in the high bass, low mids section, but the drop past 10k is most significant. The charactersitic is quite smilar to the SE846, and I would say the treble does come close, but the 846 is tiny bit more boosted from what I recall. The lack of treble extension beyond the 10k I believe creates detail loss. Oh well. I believe the Shure has Sonion in it also. Could that be responsible for early roll-off? Could it be possible their other models have better extension possibly by using better tweaters?
What Rin measured of the SE846 with B&K 4157 (IEC 60318-4) occluded ear simulator at the reference plane:
I'm not so sure about that. What UM uses is just a cheaper Chinese knockoff of the IEC711.
All drivers used in the 846 are made by Sonion. That overly complicated low pass filter is CNC-ed in US then assembled together with the drivers in Sonion's factory in Vietnam.
Early roll off or not depends on the kind of engineering given to said model. I think I posted a 2300 graph that can go beyond 16khz before dropping below nominal level as reply to you in another thread