Mikethebikeman
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I believe it may be because the 1500 HK system has small 2-way speakers in the upper door panels, and it looks like the HD HK system has small 1-way tweeters in the upper door sail panel.There is something different from the HK system in the 1500 and 2500/3500. The 1500 has 19 speakers, the 2500/3500 has 17 speakers.



