Just got mine. I have the rattling too, only on the right side, and it's there with and without a separate DAC/amp. I'm using a Centrance DACport. Here's a couple of recordings to show what it sounds like. Recorded with the iPhone Voice Memos app about 2 inches away from the driver. First one is the Bass Shaker test from Audiocheck, second one is the Twisted option of the Wiring test.
After you've listened to these, go to audiocheck.net to compare and see just how bad this problem is.
https://soundcloud.com/user411404-1/bass-shaker-k7xx-test
https://soundcloud.com/user411404-1/wiring-twisted-k7xx-test
I'm pretty bummed, to say the least.
edit: And I just discovered there's a kink in the cable that is obviously a result of the wire tie being twisted around it too tightly. That's so careless. Sigh.
Yeah it's bad. No doubt. And this is at medium listening levels. If it were only at very high levels, I might have considered just letting it be to avoid the hassle of an RMA process, but it's not.
After you've listened to these, go to audiocheck.net to compare and see just how bad this problem is.
https://soundcloud.com/user411404-1/bass-shaker-k7xx-test
https://soundcloud.com/user411404-1/wiring-twisted-k7xx-test
I'm pretty bummed, to say the least.
edit: And I just discovered there's a kink in the cable that is obviously a result of the wire tie being twisted around it too tightly. That's so careless. Sigh.