Originally Posted by Saxphile
Figured as much. The noise was there from the day I picked up my car, and I went through every single Euro in the dealership - they all had the noise. The service manager agreed with me that the noise exists, but he thinks it's more pronounced in cars with premium speakers (factory option). He has talked to Honda NZ, whom after two years decided to call it a "feature". My direct inquiries with Honda NZ HQ has gone unanswered so far, so I've pretty much given up till I tried the '06 Euro, which didn't have this noise, proving that this problem can be fixed. Although it may very well be that '06 models use a different HU (the part number has changed). I should also note that this problem does not exist in '04 Acura TSX, which uses a different HU. And I have read some reports about this problem in US-spec Accords, which I assume use the same HU as our Accord Euro.
curik, don't worry about you mods - I don't think they're the cause. If you get anywhere with your dealer, please let me know, especially if they figure out a way to fix this.
I'm always amazed at how few people actually notice this (perhaps proving that most people just listen to crap radio stations as a background sound). Granted it's not really noticable unless one listens to quiet music - perhaps I just have hyper sensitive hearing or something. Perhaps we should stop telling people about this - ignorance is bliss, you know. ;)