I was afraid of this.
I bought my 846s 1 day after stlrman, from the same place and now I am having problems as well.
The left side goes completely out. Thinking maybe it was the phone or amp, I tried an alternate pair of earphones but no such luck. It's the shures. Sometimes the sound will slightly come back in the left, but then both left and right are greatly distorted, and both sides are at a greatly reduced volume level. At this moment both sides are playing but the sound is horrific. I tried everything - tapping the shells themselves, disconnecting and reconnecting the cables, twisting the cable this way and that, especially at the plug, but nothing is working.
Called shure and they told me to call the dealer I purchased them from. Luckily the service at sweetwater is excellent so hopefully I will have a new pair tomorrow. Still, this does not give me a good feeling because, as I first suggested, the dealer's entire stock may be affected, all units having been manufactured in the same problematic production run.
I explained my concern to Mike, the Shure rep I spoke to, regarding a replacement from a dealer who may have a defective inventory. His reply was that he felt it coincidental - that the two sets of 846s purchased from the same place were defective. He also told me that if the replacement set developed a problem that I was to contact Shure rather than the dealer.
I have been listening to them as I have typed this and at this point, the problem has cleared up. Both sides sound as they should.
Funny thing is, is that I listened to them last night for a few hours before going to bed and they sounded fine. Woke this morning, got some coffee, plugged them in and - nothing. The left side was dead. I've had them about a week now and have put a little over 40 hours on them.
Has anyone besides stlrman had this problem?
I am waiting for the dealer to call me back and at a loss as to what to do. I would really hate to send them back like this, working fine, but where electronics are concerned, I know that problems simply do not go away like magic. If it happened once, it will happen again. There is something wrong. Bottom line is that for 1000.00, I really don't want to settle for IEMs that have a problem, even if it is only occasionally. What's more is, in 2 years when Shure comes out with the 925's (or whatever new model they introduce that far exceeds the 846) and I want to sell these to buy the new ones but can't without possibly having major problems (new owner gets them, left side fails, etc.)
Maybe its like they say - if it sounds to good to be true, it's because it is. I've read too many posts here about people having problems with the 846's and I am beginning to wonder for the failure rate is.