The Best car subwoofer and amp of 2023 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best car subwoofer and amp of 2023. Check our ranking below.

2,698 Reviews Scanned

Rank No. #1

Rockville RV12.2B 1200W Dual 12" Car Subwoofer Enclosure+Mono Amplifier+Amp Kit

Rockville RV12.2B 1200W dual 12" Car Subwoofer Enclosure amplifier+amp kit
Rockville RV12.2B Dual 12” bass enclosure system with matching mono block amplifier. 1200 watts peak power/ 400 watts RMS cea-2031 rating. Dual 12” bass enclosure system with matching mono block amplifier. Quasi transmission Line cabinet design.
Angled at 15% for near perfect in vehicle bass alignment. Exterior: high quality aviation grade tweed Carpet. Oversize Rockville Shield embroidery. Mono, Gold-plated push style, speaker terminal. Dual, high-power, high-efficiency 12" Subwoofers.
1200 watts peak power. Power output: 200 watts RMS cea-2006 power @ 4-Ohm and 97DBA (Reference: 1Watt into 4 ohms). Frequency Response: 15Hz - 20Khz (-3Db). RMS power: 400 watts @ 2 ohms. 4 ohm mono-block class A/B.
17" High grade twisted pair 100% Copper RCA cables. 17' 8 gauge translucent Blue Super flex Power cable. 3' 8 gauge clear super flex ground wire. 17' 18 gauge Blue remote cable. 17' 16 gauge speaker wire. Gold Plated anl heat resistant fuse holder

SaleRank No. #2

JBL SUBBP12AM - 12” amplified 12” Subwoofer with Sub Level Control, Black

powered polypropylene subwoofer with built-in amplifier that matches the woofer performance at 150W RMS or 450W Peak.
12" (305mm) woofer
35 - 120Hz frequency response
Slipstream port eliminates port noise and provides distortion-free bass at high output levels
Polypropylene Woofer Cone

Rank No. #3

PIONEER TS-WX1210AM - Powerful 12-inch Active Subwoofer with Built-in Amplifier, 1300 Watts Peak Power, and Compact Design for Deep Bass

Powerful Bass - 12-inch subwoofer and built-in amplifier, it produces a dynamic bass response that enhances the audio experience. It adds depth and richness, creating an immersive and thrilling soundstage that brings your music to life.Waterproof : No
Amplified Design - All in one design simplifies installation and space, making it an ideal choice for vehicles with limited space. Built-in amplifier ensures optimal power delivery to the subwoofer, eliminating the need for an external amplifier.
Low-Pass Crossover - Adjusting the crossover point (20 Hz – 130 Hz), you can customize the subwoofer's output to match your preferences and the characteristics of your audio system. Enables you to achieve a balanced sound and preventing any overlap in the frequency response.
Excellent Sound Reproduction - Its high-quality components and precise engineering delivers accurate and detailed sound. The design and construction minimizes distortion, for clean and crisp bass response.
Instruction & Operation – Please see the Owner’s Manual for full detail and operation found near the bottom of this page (Technical Specifications). Dimensions 12.5" x 19.75" x 14.88"

SaleRank No. #4

BOSS Audio Systems R1100M Riot Series Car Audio Subwoofer Amplifier - 1100 High Output, Monoblock, Class A/B, 2/4 Ohm Stable, Low/High Level Inputs, Low Pass Crossover, Mosfet Power Supply, Stereo

Power - 1100 Max x 1 @ 2 Ohms, 550 Max x 1 @ 4 Ohms
Class A/B Topology - Class ‘A’ amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class ‘B’ amplifiers have no current flowing through its outputs with no audio signal
Mosfet Power Supply - A MOSFET is an electrical switch that allows the flow of electrical current. It controls the output voltage & current precisely by removing the output current sensing loss & eliminating all secondary feedback circuitry
Low & High Level Inputs - A low level (RCA) input is measured in voltages. A high level (+/- wire) input is measured in wattages. Both essentially carry signal from your receiver to your amplifier to your speakers
Variable Low-Pass Crossover - Subwoofers reproduce sound based on a number of different low-range frequencies. You can set exact sound specifications for the bass frequency reproduction

SaleRank No. #5

Kicker 46CXA8001 CXA8001-800-Watt Mono Class D Subwoofer Amp

CX-Series Amplifiers are the perfect combination of big power, bigger flexibility and true reliability!
A variable 12dB crossover, KickEQ 6dB variable bass boost and a 24dB subsonic filter on mono amps gives you the control you want - to craft the sound you love.
Mono KICKER CX Amplifiers are now stable down to one Ohm, giving you the freedom to put even more subs in your system!
CX-Series amps include vertical and horizontal mounting hardware, so you can show off your install style!
These powerful amps work with as little as nine volts of power from your battery, and as much as 40 volts (400 watts) of speaker-level input signal.

Rank No. #6

Rockville RWS10CA Slim 1000 Watt 10" Amplified Powered Car Subwoofer Enclosure

Rockville RWS10CA Slim 1000 Watt 10" Amplified Powered Car Subwoofer Enclosure. 1000 Watts Peak power output.
300 Watts RMS CEA rated. 10" Super Slim Subwoofer. Ultra Stiff Composite Pulp Cone with Kevlar Reinforcement.
3D Molded Acrylic Dust Cap. Expanded & Rolled Steal Basket. High Density Laminated Foam Surround.
High Power Strontium Magnet with Ultra Saturated High BL Motor Structure. Vented Core Magnet Motor Structure.
2" High Temperature Aluminum Voice Coil. 8mm Washer & Yoke Plates. 13.6mm Peak-to-Peak X-Max. 60oz. Magnet Motor Structure.

Rank No. #7

Skar Audio RP-1200.1D Monoblock Class D MOSFET Amplifier with Remote Subwoofer Level Control, 1200W

Class D MOSFET Monoblock Power Amplifier
Peak Power at 1 Ohm: 1,600 Watts | RMS Power at 1 Ohm: 1,200 Watts
Frequency Response: 20Hz - 250Hz, On-board Bass EQ Switch with +6 or +12dB boost at 45Hz
Featuring 4-Way Protection Circuitry and 4 Gauge Power & Ground Input Terminals for Maximum Current Flow. Damping Factor - 150<
Stable at 1 ohm | Remote Subwoofer Level Control Included

Rank No. #8

Blaupunkt 1500W 1-Channel, Monoblock Amplifier

1500W Maximum Power Monoblock Amplifier
Optimized 563-watt RMS and a max output power of 1500 watts, you can give your music a huge boost in power that will have you and your passengers partying while on the road
Compactly built so this amplifier can fit perfectly into any trunk

Rank No. #9

Rockville DK58 PACKAGE Dual 8" 1600w Loaded K5 Car Subwoofer Enclosure+DB11 Amp, Black

Loaded Sub Enclosure Features: Final Impedance: 2 Ohm. Peak Power Handling: 1600 Watts. CEA-2031 Compliant RMS Power Handling: 400 Watts. ¾” MDF enclosure. Bonded stapled and braced. Computer designed vents.
Angled at 15 % for perfect bass alignment. High quality aviation grade tweed carpet. Satin Nickel speaker wire push terminals. Enclosure air space is 0.80 Cu Ft per sub. Vent dimensions: 2.5" x 6.75" x 9.75".
Tuning frequency of enclosure: 37 Hz. 1.5" 4-Layer Black Aluminum Voice Coils Wound with OFC (100% Copper) Wire. The wire we use to wind the voice coil is imported from Japan which is way better quality than the standard China wire.
Amplifier Features: Rockville dB11 1400w/700w RMS 2-Ohm Class-D Mono Car Amplifier and Bass Remote.
CEA Compliant Power Ratings (Rated at less than 1% distortion) (Use these CEA ratings when matching and comparing with other CEA compliant brands such as Kicker, Rockford Fosgate, etc.).

Rank No. #10

PRORECK PR-122M Complete 1500W Dual 12" Car Subwoofer, Includes Loaded Enclosure with Mono Block Amplifier,Wiring Installation Kit

Package Includes: (1) PRORECK PR-1500.1M 1500W Amplifier, (1) dual 12" Car Subwoofer, (1) Complete Amp Installation Wire Kit.
PRORECK PR-1500.1M Dual 12” Car Subwoofer enclosure system with matching mono block amplifier. 1500 watts peak power/ 400 watts RMS. The surface is high quality aviation grade tweed carpet and has embroidery. The angle is 15%, close to the perfect vehicle bass alignment. Frequency Response: 15Hz - 20kHz. Power Output: 200 Watts RMS Mono-block at 4 Ohms and 1% THD+N. 4-Ohm Mono-Block Class A/B. Dynamic Power: 400 Watts @ 2 Ohms.
This system includes a top-level Enclosure with more powerful and rich bass. It also includes a mono block bass amplifier. This mono amplifier is built just for loud bass.It feature high power 1.5" aluminum 4-layer voice coils with bumped and vented magnet motor structures among other features. It has efficient bass response with deep and clean sound.
Amplifier with full range RCA output, RCA line input, high level input, bass EQ, dashboard remote, etc, meet all your needs.And amplifier contains mute circuit, bass optimization circuit, protection circuit, thermal protection, speaker short circuit protection, input overload protection and DC offset protection,make users have a better experience. Rich wire set, can meet your complete needs.
Wiring Kit Features:(1)High Grade Twisted Pair 100% Copper RCA Cables,(1)Blue Super Flex Power Cable,(1)Black Ground Wire,(1)Black Remote Cable and (1)Remote control,(1)Black Split Tube,(1)Speaker Wire,(1)Gold Plated ANL Heat Resistant Fuse Holder,(1)30 Amp ANL Gold Plated Fuse.Accessories: Wire ties, ring terminals, butt connectors, spades and grommet. Amplifier dimensions: 11 x 9.1 x 1.9 inches (L x W x H) Subwoofer dimensions: 28.7 x 14.2 x 15.7 inches (L x W x H)

Rank No. #11

Rockville SK512 PACKAGE 12" 1400w Loaded K5 Car Subwoofer Enclosure+DB11 Amp, Black

Loaded Sub Enclosure Features: Rockville Single 12" K5 1400w Car Subwoofer Pre-loaded In Vented Sub Enclosure. Peak Power Handling: 1400 Watts. Program Power Handling: 700 Watts.
CEA Rated RMS Power Handling: 350 Watts. Final Impedance: 4 Ohm. ¾” MDF enclosure. Bonded stapled and braced. Computer designed vents. Angled at 15 % for perfect bass alignment. High quality aviation grade tweed carpet.
Satin Nickel speaker wire push terminals. Enclosure air space is 1.52 Cu Ft per sub. Vent dimensions (inches): 2.25" x 7" x 8.5". Tuning frequency of enclosure: 35 Hz. 2" 4-Layer Black Aluminum Voice Coils Wound with OFC (100% Copper) Wire.
Features of Amplifier: Rockville dB11 1400w/700w RMS 2-Ohm Class-D Mono Car Amplifier and Bass Remote.
CEA Compliant Power Ratings (Rated at less than 1% distortion) (Use these CEA ratings when matching and comparing with other CEA compliant brands such as Kicker, Rockford Fosgate, etc.).

Rank No. #12

JBL Basspro Hub - 11" powered subwoofer system, Black

Deep, powerful bass with power output of 200W RMS with Bass Boost ranging from 0 – 12dB Variable @ Fix 50 Hz
Dimensions (D x H): 14-3/16" x 6-1/2" (D360mm x H165mm)
Frequency Response 30Hz – 150Hz
Powered 11" Subwoofer
Car audio Subwoofer

Rank No. #13

Rockville SK510 PACKAGE 10" 1200w Loaded K5 Car Subwoofer Enclosure+DB11 Amp, Black

Loaded Sub Enclosure Features: Rockville Single 10" K5 1200w Car Subwoofer Pre-loaded In Vented Sub Enclosure, Peak Power Handling: 1200 Watts, Program Power Handling: 600 Watts, CEA Rated RMS Power Handling: 300 Watts
Vent dimensions (inches): 2" x 6.5" x 8", Tuning frequency of enclosure: 35 Hz, 2" 4-Layer Black Aluminum Voice Coils Wound with OFC (100% Copper) Wire
Features of Amplifier: Rockville dB11 1400w/700w RMS 2-Ohm Class-D Mono Car Amplifier and Bass Remote, CEA Compliant Power Ratings
Peak Power Rating: (The amount of power the amplifier can produce for a split second at the loudest part of a song) - 2 Ohm: 1400 Watts x 1 Channel, - 4 Ohm: 880 Watts x 1 Channel, High-Speed MOSFET Power Supply
Features of wire kit:, Rockville RWK81 8 Gauge 2 Channel Car Amplifier Wiring Installation Kit, (1) 17 High Grade Twisted Pair of 100% Copper RCA Cable, 17 8 Gauge Translucent Blue SuperFlex Power Cables, 17 18 Gauge Blue Remote Cable

Rank No. #14

Rockville RW10CA 10" 800 Watt Slim Low Profile Active Powered Car Subwoofer Sub, Black

Rockville RW10CA 800 Watt 10" Slim Car Subwoofer.Waterproof : No
800 Watts Peak / 200 Watts RMS. PWM MOSFET Power Supply.
Low Level RCA Input. High Level Inputs with Auto Turn-On Technology.
Adjustable Input Sensitivity. Soft Delayed Remote Turn-On.
Thermal Protection Circuit, Short Protection Circuit.

Rank No. #15

Acouto Car Audio Converter Stereo High to Low Frequency Speaker Level Converter Auto Amp Subwoofer Amplifier CD Player High to Low Adapter with Control Wire

Car Audio Signal Hi-Low Converter----This audio converter is used to convert high level audio voltage output by horn into low level audio signal. This car audio high to low converter is easy to install, just use after correct wiring
Professional Manufacturing----Brand new Aftermarket High to Low Audio Converter. The high to low converter car audio adopts professional manufacturing process, with stable performance, high precision and good reliability
High Quality----The car audio high to low converter is made of high quality material, with ABS housing, wear-resistant and durable, has long service life. The manufacture of this car stereo audio converter meets the strict quality requirements
Car Audio Modification Accessory----This audio converter is suitable for car stereos without RCA output to connect with the after-market amplifier. Although some amp has Hi-Low Convert function, we strongly recommend to have such an external converter to avoid the interference of the conversion inside the amp
Easy to Install----White Wire: Connect the positive pole of left horn . Black & White Wire: Connect the negative pole of left horn. Gray Wire: Connect the positive pole of right horn. Black & Gray Wire: Connect the negative pole of right horn. Black Wire: Connect the ground wire. Red Wire: Connect the 12V power supply. Blue Wire: Control wire REM (Connect the REM binding post of subwoofer)

Rank No. #16

Rockville RG212CA Dual 12 inches Slim Vented Powered Car Subwoofer Enclosure 2000 Watt, Black

Features of RG212CA v2: Rockville RG212CA v2 Dual 12" Slim Vented Powered Car Subwoofer Enclosure, Complete all in one system includes built in amplifier, top quality enclosure, and dual 12” subs, Vinyl finished enclosure with side vents tuned to 40Hz, Enclosure is built with ¾” MDF and is ribbed and braced, 2000 Watts Peak power output, 500 Watts RMS, 12“ Super-Slim Subwoofer, Ultra-Stiff Composite Pulp Cone with Kevlar Reinforcement, 3D Molded Acrylic Dust Cap, Expanded & Rolled Steal Basket
High Density Laminated Rubber Surround, High Power Strontium Magnet with Ultra Saturated High BL Motor Structure, Vented Core Magnet Motor Structure, 2” High Temperature Aluminum Voice Coil, 8 mm Washer & Yoke Plates, 13.6 mm Peak-to-Peak X-Max, 40 oz. Magnet, Slim Vented MDF Enclosure Design, Impedance: 4-ohms, Frequency response: 30Hz-500Hz, SPL @ 1w/1m: 89dB, Dimensions: 29.52" Length x 15" Height 4.37" Top Depth x 6.65" Bottom depth, Unit Weight: 40.12 Lbs
Amp Features: Built-in 500 Watts RMS / 2000 Watt Mono Block Amplifier, 2 Ohm stable amplifier, Class D amplifier, Extruded aluminum heatsink stays cool even at high volumes, 200mV – 5V Variable Input Level
12dB Low Pass Crossover Frequency 50Hz-200Hz, Low Level RCA Inputs, Remote level attenuation: 0 to -32.2 dB, 3.7 second turn on delay, High Level Speaker Level Input with Auto Start Music Sense, RJ11 Jack for Dash Mounted Bass Remote

SaleRank No. #17

MTX Terminator TNP212D2 1200 Watt 2 Ohm Dual 12 Subwoofers/Sub Box/Amp Package Bundle with Rockville RXC2D 2 Farad Stiffening Power Capacitor & RWK81 Amp Installation Wire Kit (3 Items)

Package Includes: (1) MTX Terminator TNP212D2 1200 Watt Dual 12” Subwoofers. (1) Rockville RWK81 8 Gauge Complete Amp Installation Wire Kit with 100 % Copper RCA. (1) Rockville RXC2D 2 Farad Stiffening Power Capacitor. Features for dual subs + box: Dual Loaded 12" Subwoofer Enclosure. 2 12" Terminator Series Subwoofers Included. 1200 watts peak output. 400 watts RMS. 2" Aluminum voice coils. Single 4 ohm voice coils per sub (pre-wired down to a 2 ohm load). Rubber Surround. Polypropylene Cone
MTX Logo on Dustcap. 48oz. Magnet. Frequency response: 37-150 Hz. Dual 12" Sealed Sub Enclosure. 5/8" MDF Solid Construction. Durable Black Carpeting. Stylish Logo in Carpet. Dimensions: 13.875"H x 29.625"W x 13.875" D. Amp Features: Terminator Series Class D Monoblock Car Amplifier. 400 x 1 watts peak @ 2 omhs. 200 x 1 RMS @ 2 ohms. LED power and protection indicators. Selectable bass boost (0, 6, 12 dB at 40 Hz). Mono gain control. Smart engage auto turn-on circuitry
Built-in adaptive cooling fans. Built in low-pass filter (85 Hz, 18 dB/octave). CEA-2006 compliant amplifier. Frequency response: 20-85 Hz. Dimensions: 13-1/16"L x 10-3/16"W x 2-1/4"H. 8 AWG power and ground leads recommended. THD at Rated RMS Power: 1%. Signal-to-Noise Ratio: 73 dB. Fuse Rating: 25A x 1. Features: Rockville RXC2D 2 Farad Stiffening Power Capacitor. 2 Farad/12 Volt Stiffening Capacitor with 24 Volt Surge Capacity. Lucite Encapsulated Display and Logic Circuitry.
Red LED Digital Voltage Display.. Blue Led Flashing Charge and Discharge Metering.. IC Controlled circuitry with negative polarity built-in protection.. Dimensions: 13" long x 3.75" wide x 7" high. Includes Clear Lucite Unbreakable Mounting Brackets, hardware and charging resistor with instructions. Features: Rockville RWK81 8 Gauge 2 Channel Car Amplifier Wiring Installation Kit. (1) 17 High Grade Twisted Pair of 100% Copper RCA Cable. 17 8 Gauge Translucent Blue SuperFlex Power Cables
17 18 Gauge Blue Remote Cable. 17 16 Gauge Clear Speaker Wire. 3 8 Gauge SuperFlex Ground Wire. Gold Plated AGU Heat Resistant Fuse Holder. 60 Amp AGU Gold Plated Fuse. 7 Split Tube Loom. Accessories Included: Wire Ties, Ring Terminals, Butt Connectors, Spades, and Grommets. Soft abrasion proof insulating jacket allows for 100% improved flexibility. PVC outer jacket can with-stand an extreme temperature range of -40 to 220 degrees F

SaleRank No. #18

BOSS Audio Systems R1002 Riot Series Car Stereo Amplifier - 200 High Output, 2 Channel, Class A/B, 2/4 Ohm Stable, Low/High Level Inputs, Full Range, Use With Subwoofer

Power - 100 Max x 2 @ 2 Ohms, 50 Max x 2 @ 4 Ohms
Full Range - With a Full Range amplifier you not only have the option to run your speakers, but also your subwoofers
Low & High Level Inputs - A low level (RCA) input is measured in voltages. A high level (+/- wire) input is measured in wattages. Both essentially carry signal from your receiver to your amplifier to your speakers
Variable Input Gain Control - The gain control is not for adjusting volume. It simply adjusts the amount of signal that is coming from your receiver and going to your amplifier
Class A/B Topology - Class ‘A’ amplifiers have enormous amount of current flowing through its output transistors with no audio signal. Class ‘B’ amplifiers have no current flowing through its outputs with no audio signal

Rank No. #19

Kicker Bundle Compatible with Universal Vehicle 44CWCD124 12" Dual 4Ohm 12" with 46CXA4001 800W Sub Amp and 112VH 12" Sub Box

Kicker CWD12 12" CompC DVC 4 Ohm Sub
Kicker 46CXA4001 Car Audio Class D Amp
112VH Single 12" Vented Sub Box Enclosure
Harmony Audio HA-AK10 Amplifier Kit

SaleRank No. #20

BOSS Audio Systems OX1.5KM Onyx Series Car Audio Subwoofer Amplifier – 1500 High Output, Class A/B, 2/4 Ohm, Low/High Level Inputs, Low Pass Crossover, MOSFET Power, Monoblock, Full Range, Stereo

POWER - 1500 Watts Max x 1 @2-Ohms, 750 Watts Max x 1 @4-Ohms
VARIABLE LOW-PASS CROSSOVER: Subwoofers reproduce sound based on a number of different low-range frequencies. You can set exact sound specifications for the bass frequency reproduction
SWITCHABLE BASS BOOST: Bass Boost allows you to adjust the low bass within the boost range to just the way you like it.
VARIABLE GAIN CONTROL: The gain control is not for adjusting volume. It simply adjusts the amount of signal that is coming from your receiver and going to your amplifier

Last update on 2023-08-14 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best car subwoofer and amp?

Do you get stressed out thinking about shopping for a great car subwoofer and amp? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching car subwoofer and amp, which is why we have assembled a comprehensive list of the greatest car subwoofer and amp available in the current market. We’ve also come up with a list of questions that you probably have yourself.

We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for car subwoofer and amp that you consider buying. Your questions might include the following:

Is it worth buying an car subwoofer and amp?
What benefits are there with buying an car subwoofer and amp?
What factors deserve consideration when shopping for an effective car subwoofer and amp?
Why is it crucial to invest in any car subwoofer and amp, much less the best one?
Which car subwoofer and amp are good in the current market?
Where can you find information like this about car subwoofer and amp?

We’re convinced that you likely have far more questions than just these regarding car subwoofer and amp, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for car subwoofer and amp, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible car subwoofer and amp. Make sure that you are only using trustworthy and credible websites and sources.

We provide an car subwoofer and amp buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available car subwoofer and amp currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

Brand Value: Every brand of car subwoofer and amp has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an car subwoofer and amp?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your car subwoofer and amp.
Customer Ratings: Number ratings grade car subwoofer and amp objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their car subwoofer and amp.
Product Quality: You don’t always get what you pay for with an car subwoofer and amp, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an car subwoofer and amp is should be an indication of how long it will work out for you.

We always remember that maintaining car subwoofer and amp information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding car subwoofer and amp is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.

The Best car subwoofer and amp of 2023 – Reviewed and Top Rated

How Do You Buy The Best car subwoofer and amp?

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