This matches what I thought I heard when I borrowed them.


Nothing "peaky" but something seemed "scooped".


They seemed "small and closed" at first, but did seem "bigger" after I relaxed into them.


The build quality felt really good (hardware).  Shame if drivers not matching with the apparent level of build quality.

One thing to be aware of is that I think my measurement system is a little bit off in terms of measured FR tilt when it comes to the supra-aurals.

I'm not sure on the details of your rig but positioning tends to be pretty important for sealed supra aurals like those.  OTOH the consistency of the Senns would indicate that Beyer really does have a lot of work to do on matching their drivers and its not some artifact.

I like the sound of my pair though.  I think I can hear the ringing at ~15kHz but other than that I like them.  Maybe I got lucky with a good pair or something.

  FS... Slightly imbalanced... I'll keep listening and see if I can live with them now that I'm going to be listening for it.  It will be interesting to see the response on HF, there are a lot of fans who aren't going to want to hear any criticism.

Beyond QC it does make me give more credit to those that claim additional cost for driver matching, well those that actually seem to do it anyway.

Send your pair in!   

I'd like to but I think I need to sell them pretty soon, even though I do like the sound of them.  I need some cash and I just don't have as much use for a pair of portable supras as I though I would.

I enjoy their sound, especially the super deep bass, but the comfort pretty much restricts them to using on the go.  They're less comfortable and don't sound as good as my T50RPs which rules them out for home listening.  IEMs are more comfortable and convenient if I'm going to be listening for longer periods of time since they're a pain to take on and off.  That's why I got the 1350s for throwing on and off for short periods of time or when I didn't want to risk the more delicate IEMs when doing something strenuous.

Those situations seemed to stop coming up too often right after I bought them.  I held on to them because I did like them but I hardly even listened to them for the reasons outline above.

Also, I did double check mine with a frequency sweep.  They aren't perfect and the louder side wanders back and forth a little but there's no wholesale mismatch with vocals coming from off center like the pair purrin measured.

My YH-3s are kind of like that which is why I haven't put any effort into modding them.  The differences don't start until you get down into the bass.  One driver goes like 2-3 octave lower IIRC.  At first I though it was probably some sort of issue with the cup or pads sealing properly but I switched them and it still did the same thing.  Then I took them out of the cups and held the the bare drivers up to my ears and they did the same thing again so it has to be the drivers themselves that are different.

The weird thing is that I didn't notice it at first, at least consciously.  They gave me listening fatigue almost as fast as Grados but I didn't know why.  My father and brother had also listened to a track or two on them and didn't notice either.  Now that I know its there I can barely listen to them at all.

I also have another interesting anecdote about driver matching relating to my T50RPs.  The pair I currently use has drivers from two different pairs since I have a habit of accidentally ripping the leads off of the driver's flexible PCB.  (I've since started tacking the leads down with hot glue immediately after I open a pair up...)  Despite that it seems to have better matching than my DT1350 when playing test tones which seems like a pretty good testament to Fostex's consistency.  Interestingly, when playing actual music the T50RP's imbalance is quite a bit more noticeable than the 1350's, which I don't hear at all.  I think its because the T50RPs have much better imaging.  The drivers have the most noticeable imbalance in the high mids to low treble and with certain female vocals, especially high pitched Jpop singers, the vocalist's position wavers a bit as the pitch of their voice changes.  The imaging on a supra aural like the 1350 would probably never be that good and probably hide a lot of inconsistency.  That's not really a good excuse for Beyer though.