You don't need a subwoofer, if it's like my radio? there's plenty of BASS in that radio if you just set it up right (There is more on this in the owners manual pg.114) if you go to "setup", there is a separate box category for "P.BASS", Just rotate the "tuning button" to P.BASS,,, Then, Push the "tuning button", to make your selection, there you can adjust the BASS from mild, to wild! I have mine set on the least Bass setting
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