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  1. Home
  2. Discontinued Car Audio & Electronics
  3. Discontinued Car Subwoofers
  4. Discontinued Car Bass Packages & Powered Subs

Discontinued Car Bass Packages & Powered Subs for your 2007 RS4 close

A car subwoofer bass package includes a car sub, amp, enclosure and wiring. It is a solution that includes everything you need to get the perfect bass solution for your ride! You will find our large selection of subwoofer systems that are ready to start thumpin'. You can also find Sub and Amp bundles in this category. These packages include the subwoofers loaded in an enclosure and powered subs that have an amplifier to power the sub. Some of the systems will even include the wiring kit. Everything you need for great bass in one convenient combo!

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Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Remote bass/level controller
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
Built-in Crossover

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.

Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
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MTX 5512-44 12" 800w Subwoofer+Vented Sub Box Enclosure+Mono Amplifier+Amp Kit

800W Peak (400W RMS) 12" 55 Series Dual 4 Ohm Subwoofer Package

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MTX 5512-44 12" 800w Subwoofer+Vented Sub Box Enclosure+Mono Amplifier+Amp Kit

800W Peak (400W RMS) 12" 55 Series Dual 4 Ohm Subwoofer Package

• 800W Peak
• 400W RMS
• Polypropylene Cone
• Rubber Surround
• Spider Plateau Venting Mechanically Cools the Voice Coil
• Radial Ribbed T-Yoke Dissipates Heat and Decreases Distortion

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99

• 800W Peak
• 400W RMS
• Polypropylene Cone
• Rubber Surround
• Spider Plateau Venting Mechanically Cools the Voice Coil
• Radial Ribbed T-Yoke Dissipates Heat and Decreases Distortion

Focal BombaBP20

8” Class-D Loaded Amplified Subwoofer Enclosure in Bandpass (150W RMS)

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Focal BombaBP20

8” Class-D Loaded Amplified Subwoofer Enclosure in Bandpass (150W RMS)

• 8” Class-D Loaded Amplified Subwoofer Enclosure
• Built-in Class-D 150W RMS Amplifier
• Power Handling: 150 W RMS 4 Ohm
• Frequency Response: 20-125Hz
• Subsonic Adjustment: 20-35Hz

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• 8” Class-D Loaded Amplified Subwoofer Enclosure
• Built-in Class-D 150W RMS Amplifier
• Power Handling: 150 W RMS 4 Ohm
• Frequency Response: 20-125Hz
• Subsonic Adjustment: 20-35Hz

NEW Kicker 10DC122 Dual 12" 600W Loaded Car Audio Subwoofers Subs+Box+Amplifier+Amp Kit

Dual 12" Comp Series Loaded Subwoofer Enclosure + 2000W Max Anarchy Series 2-Channel Amplifier + Amp Kit

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NEW Kicker 10DC122 Dual 12" 600W Loaded Car Audio Subwoofers Subs+Box+Amplifier+Amp Kit

Dual 12" Comp Series Loaded Subwoofer Enclosure + 2000W Max Anarchy Series 2-Channel Amplifier + Amp Kit

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Rockford Fosgate Punch P3 P300-12 (Open Box, Great)

600W Peak (300W RMS) Class-D Amplified Single 12" Punch Series Subwoofer Enclosure with Remote Bass Level Control Included

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Rockford Fosgate Punch P3 P300-12 (Open Box, Great)

600W Peak (300W RMS) Class-D Amplified Single 12" Punch Series Subwoofer Enclosure with Remote Bass Level Control Included

• 12" Subwoofer 300 Watts RMS
• Rockford Fosgate Sealed Enclosure
• 300 Watt Class-D Mono Block
• Bass Remote Included
• Low And High level Inputs

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• 12" Subwoofer 300 Watts RMS
• Rockford Fosgate Sealed Enclosure
• 300 Watt Class-D Mono Block
• Bass Remote Included
• Low And High level Inputs

MTX 5515-22 15" 800w Subwoofer+Vented Sub Box Enclosure+Mono Amplifier+Amp Kit

800W Peak (400W RMS) 400W 15" 55 Series Dual 2 Ohm Subwoofer Package

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MTX 5515-22 15" 800w Subwoofer+Vented Sub Box Enclosure+Mono Amplifier+Amp Kit

800W Peak (400W RMS) 400W 15" 55 Series Dual 2 Ohm Subwoofer Package

• 800W Peak
• 400W RMS
• Dual 2 ohm Voice Coil
• Polypropylene Cone
• Rubber Surround
• Spider Plateau Venting Mechanically Cools the Voice Coil
• Radial Ribbed T-Yoke Dissipates Heat and Decreases Distortion

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98

• 800W Peak
• 400W RMS
• Dual 2 ohm Voice Coil
• Polypropylene Cone
• Rubber Surround
• Spider Plateau Venting Mechanically Cools the Voice Coil
• Radial Ribbed T-Yoke Dissipates Heat and Decreases Distortion

(2) Polk Audio DB1242SVC 12” 2220w Subwoofers+Vented Box+Mono Amplifier+Amp Kit

1110W Peak (370W RMS) 12" DB+ Series Single 4 ohm Car Subwoofer (DB 1242SVC) Package

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(2) Polk Audio DB1242SVC 12” 2220w Subwoofers+Vented Box+Mono Amplifier+Amp Kit

1110W Peak (370W RMS) 12" DB+ Series Single 4 ohm Car Subwoofer (DB 1242SVC) Package

• 375 Watts RMS
• 1110 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

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120

• 375 Watts RMS
• 1110 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

(2) Polk Audio DB1242SVC 12” 2220w Subwoofers+Vented Box+Mono Amplifier+Amp Kit

1110W Peak (370W RMS) 12" DB+ Series Single 4 ohm Car Subwoofer (DB 1242SVC) Package

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(2) Polk Audio DB1242SVC 12” 2220w Subwoofers+Vented Box+Mono Amplifier+Amp Kit

1110W Peak (370W RMS) 12" DB+ Series Single 4 ohm Car Subwoofer (DB 1242SVC) Package

• 375 Watts RMS
• 1110 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

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120

• 375 Watts RMS
• 1110 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

Kicker 40DCWR102_HTG157_BAK42

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Kicker 40DCWR102_HTG157_BAK42

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(2) Polk Audio DB1042SVC 10” 2100w Subwoofers+Vented Box+Mono Amplifier+Amp Kit

1050W Peak (350W RMS) 10" DB+ Series Single 4 ohm Car Subwoofer (DB 1042SVC)

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(2) Polk Audio DB1042SVC 10” 2100w Subwoofers+Vented Box+Mono Amplifier+Amp Kit

1050W Peak (350W RMS) 10" DB+ Series Single 4 ohm Car Subwoofer (DB 1042SVC)

• 350 Watts RMS
• 1050 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

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97

• 350 Watts RMS
• 1050 Watts Max
• Polypropylene Cone
• Santoprene Rubber Surround
• IP56 Marine Certified
• Tested for salt-fog, UV and humidity
• Quick-Connect Wire Terminals

Kicker 40DCWR102_AR3000D_BAK42

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Kicker 40DCWR102_AR3000D_BAK42

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• FEATURE 4
• FEATURE 5
• FEATURE 6
• FEATURE 7

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Kicker L7S102 10" 1200w Solobaric L7S Car Subwoofer+Hifonics Amplifier+Amp Kit

1200W Peak (600W RMS) 10" Solo-Baric L7 Series Dual 2 ohm Car Subwoofer Package

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Kicker L7S102 10" 1200w Solobaric L7S Car Subwoofer+Hifonics Amplifier+Amp Kit

1200W Peak (600W RMS) 10" Solo-Baric L7 Series Dual 2 ohm Car Subwoofer Package

• Peak Power: 1,200W
• RMS Power: 600W
• Injection-molded, patented square polypropylene cone
• Ribbed santoprene surround with blue stitching

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75

• Peak Power: 1,200W
• RMS Power: 600W
• Injection-molded, patented square polypropylene cone
• Ribbed santoprene surround with blue stitching

EXCLUSIVE

1800W Alpine + Crossfire Complete Bass Package

Alpine SWR-1023D 10" Type R Series Subwoofer + Crossfire C3 501 Amplifier + 8 Gauge Kit + Enclosure

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1800W Alpine + Crossfire Complete Bass Package

Alpine SWR-1023D 10" Type R Series Subwoofer + Crossfire C3 501 Amplifier + 8 Gauge Kit + Enclosure

10" Dual 2 ohm Type R Subwoofer • 1800W Max • 600W RMS • C3 Series Monoblock Class D Car Amplifier • MOSFET Power Supply • Variable Bass Boost • 8 Gauge Amplifier Kit • 10" Single Sealed Subwoofer Enclosure

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29

10" Dual 2 ohm Type R Subwoofer • 1800W Max • 600W RMS • C3 Series Monoblock Class D Car Amplifier • MOSFET Power Supply • Variable Bass Boost • 8 Gauge Amplifier Kit • 10" Single Sealed Subwoofer Enclosure

Kenwood 8-1/4x5-1/8" 150W Low-Profile Amplified Car Subwoofer Enclosure (2 Pack)

Kenwood 8-1/4x5-1/8" 150W Low-Profile Amplified Car Subwoofer Enclosure (2 Pack)

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Kenwood 8-1/4x5-1/8" 150W Low-Profile Amplified Car Subwoofer Enclosure (2 Pack)

Kenwood 8-1/4x5-1/8" 150W Low-Profile Amplified Car Subwoofer Enclosure (2 Pack)

• 150 Watts Max
• 75 Watts RMS
• Built-In Amplifier
• Variable Gain Control
• Speaker-Level Inputs

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20

• 150 Watts Max
• 75 Watts RMS
• Built-In Amplifier
• Variable Gain Control
• Speaker-Level Inputs

Bazooka VSE-SCI-TC-04 R/B

2004-up Scion tC Custom-Fit 10" Subwoofer System w/ Built-in Amplifier

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Bazooka VSE-SCI-TC-04 R/B

2004-up Scion tC Custom-Fit 10" Subwoofer System w/ Built-in Amplifier

100W Powered 10" Subwoofer Enclosure specifically designed for 2004-up Scion tC vehicles

100W Powered 10" Subwoofer Enclosure specifically designed for 2004-up Scion tC vehicles

JL Audio 500W RMS 12" Starter Bass Package

500W RMS 12" W3v3 Series Single 2-Ohm Subwoofer with Sealed Enclosure and 500W RMS GTX Series Class-D Monoblock Amplifier

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JL Audio 500W RMS 12" Starter Bass Package

500W RMS 12" W3v3 Series Single 2-Ohm Subwoofer with Sealed Enclosure and 500W RMS GTX Series Class-D Monoblock Amplifier

• Sensitivity: 87.15 dB
• Mounting depth: 6.65 "
• Injection-molded, mineral-filled polypropylene cone
• Nitrile butadiene rubber surround
•Customization trim ring
• Floating Cone Attach Method
• DMA Optimized Motor
• Amplifier: RMS: 350W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total Peak Power: 770W
Bare wire-to-RCA adapters included
• Signal sensing turn-on
• Signal to Noise Ratio: > 80 dB
• Frequency Response: 20 - 200 Hz (±0.5 dB); 10 - 300 Hz (±3dB)

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• Sensitivity: 87.15 dB
• Mounting depth: 6.65 "
• Injection-molded, mineral-filled polypropylene cone
• Nitrile butadiene rubber surround
•Customization trim ring
• Floating Cone Attach Method
• DMA Optimized Motor
• Amplifier: RMS: 350W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total Peak Power: 770W
Bare wire-to-RCA adapters included
• Signal sensing turn-on
• Signal to Noise Ratio: > 80 dB
• Frequency Response: 20 - 200 Hz (±0.5 dB); 10 - 300 Hz (±3dB)

(2) MTX 5510-44 10" 1600w DVC 4-ohm Car Audio Subwoofers+Mono Amplifier+Amp Kit

800W Peak (400W RMS) 10" 55 Series Dual 4 Ohm Subwoofer Package

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(2) MTX 5510-44 10" 1600w DVC 4-ohm Car Audio Subwoofers+Mono Amplifier+Amp Kit

800W Peak (400W RMS) 10" 55 Series Dual 4 Ohm Subwoofer Package

• 800W Peak
• 400W RMS
• Dual 4 ohm Voice Coil
• Polypropylene Cone
• Rubber Surround
• Spider Plateau Venting Mechanically Cools the Voice Coil
• Radial Ribbed T-Yoke Dissipates Heat and Decreases Distortion

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70

• 800W Peak
• 400W RMS
• Dual 4 ohm Voice Coil
• Polypropylene Cone
• Rubber Surround
• Spider Plateau Venting Mechanically Cools the Voice Coil
• Radial Ribbed T-Yoke Dissipates Heat and Decreases Distortion

MTX S6512-44 12" 500 Watt RMS Square Car Audio Subwoofer+Mono Amplifier+Amp Kit

1000W Max (500W RMS) 12" S65 Series Dual 4 Ohm Subwoofer Package

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MTX S6512-44 12" 500 Watt RMS Square Car Audio Subwoofer+Mono Amplifier+Amp Kit

1000W Max (500W RMS) 12" S65 Series Dual 4 Ohm Subwoofer Package

• 500 Watts RMS
• 1000 Watts Max
• Square Cone
• Patented Surround Geometry
• Aluminum Basket
• Spider Plateau Venting Technology
• Frequency Response: 23 - 130 Hz

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66

• 500 Watts RMS
• 1000 Watts Max
• Square Cone
• Patented Surround Geometry
• Aluminum Basket
• Spider Plateau Venting Technology
• Frequency Response: 23 - 130 Hz

EXCLUSIVE

1000W Kenwood + PowerBass Complete Bass Package

Kenwood KFC-W2513PS 10" Performance Sub + PowerBass Xtreme XTA-2160 Amplifier + Amp Kit + Enclosure

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1000W Kenwood + PowerBass Complete Bass Package

Kenwood KFC-W2513PS 10" Performance Sub + PowerBass Xtreme XTA-2160 Amplifier + Amp Kit + Enclosure

10" Single 4 ohm KFC Series Car Subwoofer • 1000W MAX • 300W RMS • XTA Series 2-Channel Class A/B Mini Car Amplifier • 4-Way Protection Circuitry • Selectable Bass Boost • Variable Low-Pass Filter • 10" Single Sealed Subwoofer Enclosure • Complete 4 Gauge Amp Kit

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52

10" Single 4 ohm KFC Series Car Subwoofer • 1000W MAX • 300W RMS • XTA Series 2-Channel Class A/B Mini Car Amplifier • 4-Way Protection Circuitry • Selectable Bass Boost • Variable Low-Pass Filter • 10" Single Sealed Subwoofer Enclosure • Complete 4 Gauge Amp Kit

(2) MTX 3512-04S 12" 1200w Shallow Subwoofers+Sealed Slim Box+Amplifier+Wires

500W Peak (250W RMS) 12" 35 Series Single 4 Ohm Subwoofer Package

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(2) MTX 3512-04S 12" 1200w Shallow Subwoofers+Sealed Slim Box+Amplifier+Wires

500W Peak (250W RMS) 12" 35 Series Single 4 Ohm Subwoofer Package

• 500W Peak
• 250W RMS
• Polypropylene Woofer Cone
• Nitrile Butyl Rubber Surround
• Inverted Apex Surround Design
• Spring Loaded Push Pin Terminals

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207

• 500W Peak
• 250W RMS
• Polypropylene Woofer Cone
• Nitrile Butyl Rubber Surround
• Inverted Apex Surround Design
• Spring Loaded Push Pin Terminals

BOSS AUDIO CX122 12" 1400W Car Power Subwoofers Sub+Mono Amplifier+ Amp Kit+Box

700W 12" Chaos EXXtreme Series Single 4 ohm Subwoofer

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BOSS AUDIO CX122 12" 1400W Car Power Subwoofers Sub+Mono Amplifier+ Amp Kit+Box

700W 12" Chaos EXXtreme Series Single 4 ohm Subwoofer

• 1400W Peak
• 700W RMS
• 4 Ohm Impedance
• Custom Tooled Polypropylene Cone
• Butyl Rubber Surround
• 2" High Temperature Aluminum Voice Coil
• 39 oz Magnet Structure

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340

• 1400W Peak
• 700W RMS
• 4 Ohm Impedance
• Custom Tooled Polypropylene Cone
• Butyl Rubber Surround
• 2" High Temperature Aluminum Voice Coil
• 39 oz Magnet Structure

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    FAQ Frequently asked questions in Discontinued Car Bass Packages & Powered Subs

    A car subwoofer with a box and amp is a complete audio package that includes a subwoofer driver, an enclosure (box), and an amplifier. This all-in-one solution is designed to deliver powerful and impactful bass to enhance your car audio experience. The subwoofer driver is responsible for producing low-frequency sounds, while the enclosure ensures that the subwoofer operates efficiently and delivers clear bass. The amplifier provides the necessary power to drive the subwoofer effectively. The main advantage of this package is convenience and compatibility; all the components are matched to work together optimally, saving you the hassle of choosing compatible parts separately. Additionally, car subwoofers with a box and amp offer an easy and straightforward installation process, making it an ideal choice for those new to car audio upgrades.
    Using a car subwoofer with a box and amp offers several benefits. First and foremost, it simplifies the shopping process, as you get a complete audio package with all the necessary components for a bass-enhanced sound system. These packages are specifically designed to work together, ensuring optimal performance and eliminating the guesswork of selecting compatible components. Additionally, car subwoofer packages with a box and amp often provide excellent value for money compared to purchasing individual components separately. They are also designed for easy installation, even for beginners, saving time and effort. Moreover, these packages are available in different configurations, catering to various audio preferences and vehicle sizes. Whether you prefer deep and punchy bass or a more balanced sound, there's a car subwoofer package to suit your needs.
    Car subwoofer packages with a box and amp are versatile and can be used in various types of vehicles, including cars, trucks, SUVs, and even boats. The sizes and configurations of these packages are designed to accommodate different vehicle spaces and audio preferences. Smaller vehicles may benefit from compact subwoofer packages that fit snugly in limited spaces, while larger vehicles may utilize more substantial packages for a more robust bass response. However, before purchasing a car subwoofer package, it's essential to consider the available space in your vehicle and the dimensions of the enclosure and subwoofer. Some packages may require more significant modifications to fit properly, so it's crucial to choose one that matches your vehicle's available space and complements your desired audio performance.
    Yes, in many cases, you can customize the car subwoofer package to suit your preferences and needs. While pre-packaged car subwoofer systems offer convenience and compatibility, some audio enthusiasts prefer to select individual components to achieve specific audio goals. For example, if you have a particular subwoofer model or brand in mind that is not included in the package, you can often purchase the enclosure and amp separately to match your preferred subwoofer. However, it's essential to ensure that the components are compatible and properly matched to avoid performance issues or potential damage. If you are considering customization, consult with car audio experts who can guide you in choosing the best combination of subwoofer, enclosure, and amp that will work harmoniously to deliver your desired bass performance.
    Yes, car subwoofer packages with a box and amp may require additional wiring and installation accessories to complete the setup. While the package typically includes the essential components, such as the subwoofer, enclosure, and amplifier, you may need to purchase wiring kits, connectors, and other accessories separately for the installation process. Wiring kits are crucial for connecting the amplifier to your car's battery and head unit, ensuring proper power supply to the subwoofer. Additionally, you may need mounting brackets, screws, and other hardware to secure the subwoofer enclosure in your vehicle. It's essential to use high-quality wiring and installation accessories to ensure a reliable and safe installation that will maximize the performance of your car subwoofer package. If you are uncertain about the installation process or the required accessories, consider seeking professional installation services to ensure everything is set up correctly for optimal audio performance.
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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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