Tag Archives: Harmon Kardon

Review: Harmon Kardon AVR 247 Receiver

The sound quality is quite good, especially for an amp of this price point. However, this unit (and probably others in HK’s line, I imagine) has a flaw that will especially affect those users that rely on over-the-air TV (either digital or analog). Somehow, despite (and to the detriment of) their reputation, HK failed to effectively shield the digital electronics in this amp, and as a result it creates a tremendous amount of radio interference. They allude indirectly to this on their website FAQ, in fact, in warning cable users to use properly shielded cables. You know you’ve got a serious interference problem if you have to warn cable users about interference. God forbid you should actually try to get a digital over-the-air broadcast; apparently HK forgot about those users. Over-the-air users have no way to shield themselves from the interference coming from this unit, unfortunately. In my case, whenever I have this amp turned on, I lose digital TV reception. Given that I’m living within 7 miles of the transmitters, this suggests the 247 is quite a naughty little electromagnetic neighbor.

Perusing the net a little more thoroughly than I did upon my initial search, I find that others are having similar problems with various HK receivers, so this appears to be a problem across their recent line of receivers.

Even if most people have cable these days, this is inexcusable for a company that makes AV receivers. While HK was once a great manufacturer, they have clearly gone downhill in quality in some respects. The sound on this unit is good, but it may very well wreck your TV reception unless you have cable.