I have a set of Hawg-Wired speakers from my 2005 Screamin Eagle Electra Glide, and the speakers worked AWESOME. I took them off, and was getting ready to put them in my new 2009 Screamin Eagle Road Glide until I spoke to Hawg-Wired. The guys at Hawg-Wired have always been super honest when purchasing from them. They told me that the old stereo system that was on the 05' Screamin Eagle Electra Glides were a High Output stereo, and that I did not need an amp to run the Hawg-Wired speakers. When I told them that I was going to put those same speakers in my 09' Screamin Eagle Road Glide, they told me that the Harmon Kardon stereo is only half the watts that the old pre Harmon Kardon stereo put out, because the Harmon Kardon is not a high output standard. He said that the stock Harmon Kardon stereo would not have enough power to push the Hawg-Wired speakers. By putting the Hawg-Wired in, that I would only be able to get half the volume out of them with the stock stereo. I was always under the impression that the Harmon Kardon was a lot better than the old stereo, but maybe not.
GlideBoy