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Passive crossovers and bass blockers improve the efficiency of smaller speakers by eliminating lower frequencies that the speakers can't handle when the volume is cranked up. You can also eliminate higher frequencies depending on the crossover.
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Bass Blockers

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Pair of Bass Blocker / Passive Crossover; Removes 0-300Hz at 4 ohms, 0-150Hz at 8 ohms (BB1PR)
Free Ground Shipping within the 48 states
Pair of Bass Blockers for 6" x 9" Speakers • Blocks 0-300Hz @ 4 Ohms • Blocks 0-150Hz @ 8 Ohms • Filters Out Unwanted Frequencies Towards Speakers
$9.99
Shipping: FREE
To the US • other rates
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Pack of Two 133 UF 50-Volt Non-Polar 10% Bass Blocker Capacitors
Free Flat Rate Shipping within the entire USA!
Pack of Two 133 uF Non-Polar 10% Bass Blocker Capacitors • Removes Selected Frequencies from the Audio Source • 50 Volts • Protects the Speakers from Receiving Damaging Frequencies • 300 Hz @ 4 Ohm
$5.99
Shipping: FREE
To the US • other rates
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Pack of Two 398 UF 100-Volt Non-Polar 10% Bass Blocker Capacitors
Free Flat Rate Shipping within the entire USA!
Pack of Two 398 uF Non-Polar 10% Bass Blocker Capacitors • Removes Selected Frequencies from the Audio Source • 100 Volts • Protects the Speakers from Receiving Damaging Frequencies • 100 Hz @ 4 Ohm
$7.99
Shipping: FREE
To the US • other rates
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Pair of Bass Blocker 6" x 9", Removes 0-5.6kHz at 4 ohms, 0-2.8kHz at 8 ohms
Free Flat Rate Shipping within the 48 states
Bass Blockers • Removes Low Frequency Sounds • 0-5.6 kHz @ 4 Ohms • 0-2.8 kHz @ 8 Ohms • Black Wire Color
$11.99
Shipping: FREE
To the US 48 • other rates
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Pair of Bass Blockers Designed for 6" Speakers (Blocks 0-600Hz at 4 ohms, 0-300Hz at 8 ohms)
Free Flat Rate Shipping within the 48 states
Pair of Bass Blockers For 6" Speakers • Blocks 0-600 Hz @ 4 Ohms • Blocks 0-300 Hz @ 8 Ohms • Encased in Durable Plastic Casing • Handles Power up to 50 Watts
$14.99
Shipping: FREE
To the US 48 • other rates
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Pair of 4" Bass Blockers, Blocks 0-1.2Khz at 4 ohms and 0-600hz at 8 ohms
Free Flat Rate Shipping within the entire USA!
Pair of Bass Blockers For 4" Speakers • Blocks 0-1200 Hz @ 4 Ohms • Blocks 0-600 Hz @ 8 Ohms • Encased in Durable Plastic Casing • Handles Power up to 50 Watts
$14.99
Shipping: FREE
To the US • other rates
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50uF Bass Blocker Crossover Capacitor
50uF Bass Blocker Crossover Capacitor • Remove or "Cut Out" Sounds that are Below a Certain Frequency • Designed to Enhance the Performance and Power Handling of Tweeters and Midrange Speakers • Installs In-Line to Speakers
$0.65
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47uF Bass Blocker Crossover Capacitor
47uF Bass Blocker Crossover Capacitor • Remove or "Cut Out" Sounds that are Below a Certain Frequency • Designed to Enhance the Performance and Power Handling of Tweeters and Midrange Speakers • Installs In-Line to Speakers
$0.79
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4.7uF Bass Blocker Crossover Capacitor
4.7uF Bass Blocker Crossover Capacitor • Remove or "Cut Out" Sounds that are Below a Certain Frequency • Designed to Enhance the Performance and Power Handling of Tweeters and Midrange Speakers • Installs In-Line to Speakers
$0.79
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220uF Bass Blocker Crossover Capacitor
220uF Bass Blocker Crossover Capacitor • Remove or "Cut Out" Sounds that are Below a Certain Frequency • Designed to Enhance the Performance and Power Handling of Tweeters and Midrange Speakers • Installs In-Line to Speakers
$1.99
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Pack of Two 199 UF 100-Volt Non-Polar 10% Bass Blocker Capacitors
Free Flat Rate Shipping within the entire USA!
Pack of Two 199 uF Non-Polar 10% Bass Blocker Capacitors • Removes Selected Frequencies from the Audio Source • 100 Volts • Protects the Speakers from Receiving Damaging Frequencies • 200 Hz @ 4 Ohm
$6.99
Shipping: FREE
To the US • other rates
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Bass Blocker / Passive Crossover; Removes 0-2.8kHz at 4 ohms, 0-1.4kHz at 8 ohms
Free Flat Rate Shipping within the 48 states
Bass Blocker • Removes Low Frequency Sounds • 0-2.8 kHz @ 4 Ohms • 0-1.4 kHz @ 8 Ohms • Red Wire Color
$7.96
Shipping: FREE
To the US 48 • other rates
Availability: Limited stock
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100uF Bass Blocker Crossover Capacitor
100uF Bass Blocker Crossover Capacitor • Remove or "Cut Out" Sounds that are Below a Certain Frequency • Designed to Enhance the Performance and Power Handling of Tweeters and Midrange Speakers • Installs In-Line to Speakers
$1.99
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33uF Bass Blocker Crossover Capacitor
33uF Bass Blocker Crossover Capacitor • Remove or "Cut Out" Sounds that are Below a Certain Frequency • Designed to Enhance the Performance and Power Handling of Tweeters and Midrange Speakers • Installs In-Line to Speakers
$0.79
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200uF Bass Blocker Crossover Capacitor
200uF Bass Blocker Crossover Capacitor • Remove or "Cut Out" Sounds that are Below a Certain Frequency • Designed to Enhance the Performance and Power Handling of Tweeters and Midrange Speakers • Installs In-Line to Speakers
$1.99
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3.3uF Bass Blocker Crossover Capacitor
3.3uF Bass Blocker Crossover Capacitor • Remove or "Cut Out" Sounds that are Below a Certain Frequency • Designed to Enhance the Performance and Power Handling of Tweeters and Midrange Speakers • Installs In-Line to Speakers
$0.79
Availability: Limited stock
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Bass Blocker / Non-Polar 10% Capacitor, Removes 400Hz @ 4 ohms or 200Hz @ 8 ohms
Metra Bass Blocker • Non-Polar 10% Capacitor • 4 Ohm: 400Hz • 8 Ohm: 200Hz • 100 Volts • 99 uf • White Heat Shrinked Capacitor • Yellow Color Coded Silver Wire
$3.99
Availability: Limited stock
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Pack of Two 468 UF 100-Volt Non-Polar 10% Bass Blocker Capacitors
Pack of Two 468 uF Non-Polar 10% Bass Blocker Capacitors • Removes Selected Frequencies from the Audio Source • 100 Volts • Protects the Speakers from Receiving Damaging Frequencies • 85 Hz @ 4 Ohm
$7.99
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Pack of Two 14 UF 50-Volt Non-Polar 10% Bass Blocker Capacitors
Pack of Two 14 uF Non-Polar 10% Bass Blocker Capacitors • Removes Selected Frequencies from the Audio Source • 50 Volts • Protects the Speakers from Receiving Damaging Frequencies • 2800 Hz @ 4 Ohm
$4.99
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Pair of Bass Blocker / Passive Crossover; Removes 0-800Hz at 4 ohms, 0-400Hz at 8 ohms (BB3PR)
Free Flat Rate Shipping within the entire USA!
Pair of Bass Blockers for 5-1/4" Speakers • Blocks 0-800Hz @ 4 Ohms • Blocks 0-400Hz @ 8 Ohms • Filters Out Unwanted Frequencies Towards Speakers
$14.99
Shipping: FREE
To the US • other rates
Availability: Out of Stock - Backorder
Items per page: 20 50 100
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