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JK Electrical, Lighting & Sound SystemsBulletin board forum regarding topics such as stereo head units, CD players, MP3 players, speaker systems, amplifiers, hardmounted GPS devices, computers, headlight upgrades, fog lights, off-road lights, general wiring and anti-theft devices.
Putting in the hothead liners makes a huge difference in sounds as well. I have all Polk Audio speakers, Infiniti tweeters, Kenwood amp and a JL Audio 10 inch sub and the hothead liners made the tin box effect go away.
Those definitely help. Its like Dynamatting the roof.