Hogtunes NCA 450U KIT-AA : 4 Channel Amp / Speakers (1998 - 2013 - model years) - Manual (Page 7)

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systeM upgrade #1
Hogtunes HF-1 tweeter pod for 1998-2013 bikes not only looks great, it’s easy
to install and brings ANY audio system to the next level! Adding these tweeters to
any system “fixes” the inherent audio issues created by the stock speaker locations
and will give much better clarity, especially at speed. Out of the box, HF-1
matches the factory “satin black” perfectly, but also comes apart easily and can
be painted to match any custom inner fairings. HF-1 comes with plug and play
wiring and everything needed to complete the job. You can learn more by visiting
http://www.hogtunes.com/products/tweeters/hf-1.html