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Best Choice RonDexy 
RonDexy RDBB Pair of Bass Blocker/Passive Crossover (Protect Tweeter) 1. Shields car audio tweeters from harmful frequencies. Two 5600Hz bass blockers (attached 6" speaker wires on both endsRonDexy 
RonDexy RDBB Pair of Bass Blocker/Passive Crossover (Protect 6''-6.75'' Speaker) 1.Shields 6.5” car audio speakers from harmful frequencies.Best Value RonDexy 
RonDexy RDBB Pair of Bass Blocker/Passive Crossover (Protect 6''X9'' Speaker) 1. Protects 6’’X 9” car audio speakers from harmful frequencies. Frequency range blocked: 4 ohms: 0-300 Hz / 8 ohms: 0-1Audiopipe 
AUDIOPIPE 14 UF BASS Noise BLOCKERS 2.8khz @ 4 Ohm 3.5 to 4 2 PCS Brand New & Factory Original!Nippon Power 
AUDIOP BB133 Bass Blocker for 6 in. x 9 in. Speakers Noise Reduction TechAudiopipe 
Audiopipe 133 UF Bass Blockers 300Hz - 4 Ohm 150Hz - 8 Ohm 6"x9" 6"x8" 4 Pack Dynamic Bass Performance: Experience rich, powerful bass with our 6-inch dynamic driver speakers, delivering up to 200WYOUYIEN 
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