Shure shipped out my new 846 (next day air) on 12-27-13 and I received it 1-2-14. Don't get me started on UPS....
My attempted “burn-in” comparison couldn't be fully realized because brain-burn is part of the equation plus my memory (without notes) of 4 months ago (or 2 weeks ago) is an inadequate A/B tool (considering it is the same IEM). However, the sound of the new 846 is not as I remembered from my initial impression of my old 846. There is no initial bass bloat. The sound-stage and transparency of the new 846 is pretty good right from the start as well.
When I had the old 846, I posted that I wished Shure would make a 535-like filter. But now, I'd describe my new 846 as a natural upgrade for the 535 with the Shure “house sound” (as they say). It's the same emphasis just smoother, thicker, and warmer with greater depth.
The treble of the old 846 was quite soft in the beginning. I thought the treble was pretty good on the old 846 just before the driver died. The new 846 is starting out better. If it gets even better than now, look out....
I would be remiss, if I didn't add that the triple-flange hybrid tips that I use now is the same one I used on the old 846 just before it died. Why does that matter? It was well broken in . Which means perhaps I (over time) mistook the softening perfectly sealing (quite bendable) silicon tip and its resulting transparent sound with IEM “burn in”. But anyway, moving on.... I still believe.
Due to a bad headphone jack on my iPod Touch 3G, I bought an iPod Touch 5G mostly for pod-casts and apps. I just can't get into the way music sounds with the 5G and my earphones. With the standard Apple music app (even with EQ), it is unbalanced. The mids are fat and in your face and the bass is disproportionately small while the treble lacks precision. I assume that the Note 3 is not a good impedance match for the 846, but using Poweramp, the sound is more HiFi-like (fat bass, properly sized mids, crisp treble, and a 3D sound-stage). But, mind you, I am not an audiophile. I'll revisit this in the future. I have a FiiO X3 coming that should be here tomorrow (that is, if UPS doesn't screw it up...)
Edited by truckdriver - 1/5/14 at 5:01pm