This is the thread for the HD radio performance using the JVC KD-HDR1 car stereo receiver. I have owned mine for just over a year now; and I must say that I am for the most part satisfied with it's performance.
First for the feature that's important to this thread, the HD radio reception on FM & AM: The KD-HDR1 is pretty consistent in only locking into an HD signal on the FM side when I am within 2/3 of the station's 60 dBu service contour, provided there are little or no interfering factors such as terrain or tall buildings. On the AM side, I get a ground wave range of about 33 miles for a locked-in HD AM station broadcasting 50 kW. However, I have actually received KMOX 1120 AM out of St. Louis while I was in Indianapolis during the late evening hours of a January day in 2008, which is a ground distance of 240 miles. What really frustrates me about some of the newer stations in smaller cities broadcasting in HD is that these stations, even when in HD for well over a year, are not even employing the 8 second delay on their analog side so that both sides are in sync when the receiver switches from one side to the other during the initial tune-in or when traveling in the HD fringe area of the signal (and yes, I've sent correspondence to the engineering staff of these stations long ago, to no avail).
The KD-HDR1 receiver does have other really cool features that I enjoy, such as the 7 band graphic equalizer and the SRS audio enhancements that create simulated subwoofer and surround effects; which sound really great when not used at excessive levels; and it takes a lot of time and effort to tweak everything until it sounds just right for the interior of my 95 Regal. But the feature I'm most impressed with is it's ability to play a music CD or a disc with MP3 or WMA files and not skip a beat even on the roughest roads.
If any of you own a JVC KD-HDR1, I'd like to hear about your experience.