Got my HBH-660. With the 3500c stack it works perfectly. I can go into the next room with no static. Brilliant. Really nice headset.

Now the AX isn't doing so well. Some post good results, I just can't figure out why I'm getting so much static, with the phone right next to the earpiece, too. Also I sound small and tinny on the other end, or so I'm told. ...