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A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

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Bass reconstructors, or bass enhancers, improve low frequency reproduction in a car audio system with at least one subwoofer. These bass expander products will help your subs produce accurate bass thumps.
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A line driver is a small amplifier used to support the strength of the audio signal coming from the source unit.
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JL Audio TwK-88

8-Channel Digital Sound Processor with 10-Band EQ Time Delay

TwK-88 big
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8-Channel Digital Sound Processor with 10-Band EQ Time Delay

• 8 Channel System Tuning Digital Sound Processor
• 10 Band Graphic and Parametric Equalizer
• Variable high pass and low pass filters
• Ability to configure delay and offset in time or distance units
• DRC-200 wired remote control included

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FREE 2-day shipping to VA. Get it Sat, Mar. 30
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VIP Product Get $55.00 in rewards to spend later

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Universal Fitment Icon Universal-fit, works with nearly all vehicles.

5
$549.99

In stock

Only 2 Left!

• 8 Channel System Tuning Digital Sound Processor
• 10 Band Graphic and Parametric Equalizer
• Variable high pass and low pass filters
• Ability to configure delay and offset in time or distance units
• DRC-200 wired remote control included

TwK-88 small

Item added to your cart.

Price: $549.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7
Essential add-ons
Belva BBIC65

5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable (CCA)

$29.99

$9.99

Add to cart
NVX XIV65

V-Series: 5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable

$49.99

$29.99

Add to cart
Stinger SI4612

12 ft. of 6-Channel 4000 Series RCA Interconnect Cables

$73.00

$28.99

Add to cart
NVX XIV25

V-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$18.99

$12.99

Add to cart
NVX XIX25

X-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$29.99

$18.99

Add to cart
SMD CC-1

Crossover Calibrator (CC1)

$195.99

$192.99

Add to cart
SMD DD-1+

Distortion Detector/Analyzer

$312.99

$329.99

Add to cart
SMD DD-1

Distortion Detector/Analyzer

$207.99

$199.99

Add to cart

JL Audio TwK-D8 Digital Sound Processor

8-Channel DSP and 1 Digital Optical Output

TwK-D8 big
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8-Channel DSP and 1 Digital Optical Output

• 8 Channel System Tuning Digital Sound Processor
• 10 Band Graphic and Parametric Equalizer
• Variable high pass and low pass filters
• Ability to configure delay and offset in time or distance units
• DRC-200 wired remote control included

shipping truck icon
FREE 2-day shipping to VA. Get it Sat, Mar. 30
VIP Star Icon

VIP Product Get $50.00 in rewards to spend later

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

$499.99

In stock

Only 2 Left!

• 8 Channel System Tuning Digital Sound Processor
• 10 Band Graphic and Parametric Equalizer
• Variable high pass and low pass filters
• Ability to configure delay and offset in time or distance units
• DRC-200 wired remote control included

TwK-D8 small

Item added to your cart.

Price: $499.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7
Essential add-ons
Belva BBIC65

5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable (CCA)

$29.99

$9.99

Add to cart
NVX XIV65

V-Series: 5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable

$49.99

$29.99

Add to cart
Stinger SI4612

12 ft. of 6-Channel 4000 Series RCA Interconnect Cables

$73.00

$28.99

Add to cart
NVX XIV25

V-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$18.99

$12.99

Add to cart
NVX XIX25

X-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$29.99

$18.99

Add to cart
SMD CC-1

Crossover Calibrator (CC1)

$195.99

$192.99

Add to cart
SMD DD-1+

Distortion Detector/Analyzer

$312.99

$329.99

Add to cart
SMD DD-1

Distortion Detector/Analyzer

$207.99

$199.99

Add to cart

JL Audio TwK-D8 Digital Sound Processor (Open-box, Like New)

8-Channel DSP and 1 Digital Optical Output

TwK-D8 big
Go to item page Right Arrow Icon of Right Arrow

8-Channel DSP and 1 Digital Optical Output

• 8 Channel System Tuning Digital Sound Processor
• 10 Band Graphic and Parametric Equalizer
• Variable high pass and low pass filters
• Ability to configure delay and offset in time or distance units
• DRC-200 wired remote control included

shipping truck icon
FREE 2-day shipping to VA. Get it Sat, Mar. 30
VIP Star Icon

VIP Product Get $40.00 in rewards to spend later

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

Was $499.99 Details
$399.99

In stock

Only 2 Left!

• 8 Channel System Tuning Digital Sound Processor
• 10 Band Graphic and Parametric Equalizer
• Variable high pass and low pass filters
• Ability to configure delay and offset in time or distance units
• DRC-200 wired remote control included

TwK-D8 small

Item added to your cart.

Price: $399.99

Essential add-ons
Belva BBIC65

5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable (CCA)

$29.99

$9.99

Add to cart
NVX XIV65

V-Series: 5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable

$49.99

$29.99

Add to cart
Stinger SI4612

12 ft. of 6-Channel 4000 Series RCA Interconnect Cables

$73.00

$28.99

Add to cart
NVX XIV25

V-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$18.99

$12.99

Add to cart
NVX XIX25

X-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$29.99

$18.99

Add to cart
SMD CC-1

Crossover Calibrator (CC1)

$195.99

$192.99

Add to cart
SMD DD-1+

Distortion Detector/Analyzer

$312.99

$329.99

Add to cart
SMD DD-1

Distortion Detector/Analyzer

$207.99

$199.99

Add to cart

JL Audio CL441dsp CleanSweep

CleanSweep® OEM Audio Interface with Automatic Digital EQ

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CleanSweep® OEM Audio Interface with Automatic Digital EQ

• CleanSweep OEM Audio Interface
• 32 Bit SHARC DSP Processor
• Automatically Equalizes Each Channel Independently
• AUX Input
• 2 Pair RCA Outputs

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

• CleanSweep OEM Audio Interface
• 32 Bit SHARC DSP Processor
• Automatically Equalizes Each Channel Independently
• AUX Input
• 2 Pair RCA Outputs

CL441dsp small

Item added to your cart.

Price: $299.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7
Essential add-ons
Belva BBIC65

5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable (CCA)

$29.99

$9.99

Add to cart
NVX XIV65

V-Series: 5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable

$49.99

$29.99

Add to cart
Stinger SI4612

12 ft. of 6-Channel 4000 Series RCA Interconnect Cables

$73.00

$28.99

Add to cart
NVX XIV25

V-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$18.99

$12.99

Add to cart
NVX XIX25

X-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$29.99

$18.99

Add to cart
SMD CC-1

Crossover Calibrator (CC1)

$195.99

$192.99

Add to cart
SMD DD-1+

Distortion Detector/Analyzer

$312.99

$329.99

Add to cart
SMD DD-1

Distortion Detector/Analyzer

$207.99

$199.99

Add to cart

JL Audio TWK-88 (Open Box, Complete)

8-Channel Digital Sound Processor w/ Analog/Digital Inputs

Go to item page Right Arrow Icon of Right Arrow

8-Channel Digital Sound Processor w/ Analog/Digital Inputs

• 8 Channel System Tuning Digital Sound Processor
• 10 Band Graphic and Parametric Equalizer
• Variable high pass and low pass filters
• Ability to configure delay and offset in time or distance units
• DRC-200 wired remote control included

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

• 8 Channel System Tuning Digital Sound Processor
• 10 Band Graphic and Parametric Equalizer
• Variable high pass and low pass filters
• Ability to configure delay and offset in time or distance units
• DRC-200 wired remote control included

TwK-88 small

Item added to your cart.

Price: $449.99

Essential add-ons
Belva BBIC65

5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable (CCA)

$29.99

$9.99

Add to cart
NVX XIV65

V-Series: 5m (16.40 ft) 6-Channel RCA Audio Interconnect Cable

$49.99

$29.99

Add to cart
Stinger SI4612

12 ft. of 6-Channel 4000 Series RCA Interconnect Cables

$73.00

$28.99

Add to cart
NVX XIV25

V-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$18.99

$12.99

Add to cart
NVX XIX25

X-Series: 5m (16.40 ft) 2-Channel RCA Audio Interconnect Cable

$29.99

$18.99

Add to cart
SMD CC-1

Crossover Calibrator (CC1)

$195.99

$192.99

Add to cart
SMD DD-1+

Distortion Detector/Analyzer

$312.99

$329.99

Add to cart
SMD DD-1

Distortion Detector/Analyzer

$207.99

$199.99

Add to cart
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