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You didn't say but I'm assuming you didn't enclose the speaker in an sealed box. If you look in the directions that came with the soundtraxx mod there will be directions on how to enclose your speaker. Even a small enclosure will greatly increase the sound. I know with diesels theres a limited space, some people will put the speaker in a B-unit, this will give you the space for a good size enclosure and a good size speaker. Remember the bigger the speaker the better the sound. Also make sure you connect the + wire from the mod to the + side of the speaker. If you don't know which side is the + side there are directions on soundtraxx web site. Good luck!
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