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Customer Reviews: Crutchfield Bass Blockers (300 Hz cut-off) Pair of inline frequency filters at Crutchfield
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Amazon.com: Audiopipe 133 UF Bass Blockers 300Hz - 4 Ohm 150Hz - 8 Ohm 6"x9" 6"x8" 4 Pack : Electronics
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BB-35 Bass Blocks Designed to Protect Car Audio 3.5 Inch Speakers, Eliminate Frequencies 0-2.8kHz at 4Ohms, Pair - Recoil Audio
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Amazon.com: Audiopipe 133 UF Bass Blockers 300Hz - 4 Ohm 150Hz - 8 Ohm 6"x9" 6"x8" 5"x7" : Electronics
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Crutchfield Bass Blockers Pair of inline high-pass filters (5000 Hz cut-off) for tweeters at Crutchfield
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