Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.

6-1/2" (24)

6-1/2" (also 6-3/4" locations) (6)

3-1/2" (3)

Design

The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.

2-way Coaxial (18)

2-way Component System (12)

Mid-range (3)

RMS Power Handling

The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.

35–54.99 watts (3)

55–74.99 watts (2)

75–99.99 watts (4)

100 watts or more (24)

Peak Power Handling

Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.

100–199.99 watts (5)

200–299.99 watts (4)

300 watts or more (24)

Sensitivity

An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".

80–89.99 dB (18)

90–99.99 dB (15)

Impedance (Per Voice Coil)

The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.

4 (31)

2 (2)

Shallow Mount Installation

This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

No (29)

Yes (2)

Tweeter Design

Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.

Dome (28)

Bullet (1)

Horn (1)

Series

Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.

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NVX NSP65

540W Peak (180W RMS) 6.5" N-Series 2 Way Coaxial Car Speakers

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NVX NSP65

540W Peak (180W RMS) 6.5" N-Series 2 Way Coaxial Car Speakers

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB
• Mounting Depth: 2.40"

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NVX VSP65KIT

750W Peak (250W RMS) 6.5" V-Series 2 Way Component Car Speakers

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NVX VSP65KIT

750W Peak (250W RMS) 6.5" V-Series 2 Way Component Car Speakers

• 375 watts Peak Each, 125 watts RMS Each
• 1" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB
• Mounting Depth: 2.51"

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NVX - Worth the Envy - Direct to Consumer Car Audio

NVX XQS65KIT Version 2 (XQS65KITv2)

600W Peak (300W RMS) 6.5" X-Series 2 Way Component Car Speakers

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NVX XQS65KIT Version 2 (XQS65KITv2)

600W Peak (300W RMS) 6.5" X-Series 2 Way Component Car Speakers

• 300 watts Peak Each, 150 watts RMS Each
• 1-1/8" Silk Dome tweeters
• Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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NVX VSP65

600W Peak (200W RMS) 6.5" V-Series 2 Way Coaxial Car Speakers

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NVX VSP65

600W Peak (200W RMS) 6.5" V-Series 2 Way Coaxial Car Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 1" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB
• Mounting Depth: 2.51"

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NVX XSP652

600W Peak (200W RMS) 6.5" X-Series 2 Way Coaxial Car Speakers

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NVX XSP652

600W Peak (200W RMS) 6.5" X-Series 2 Way Coaxial Car Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 1" Silk Dome tweeters
• Lightweight Real Carbon Fiber cone
• Impedance: 4 ohm
• Sensitivity: 92 dB
• Mounting Depth: 2.52"

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NVX ESP65

360W Peak (120W RMS) 6.5" E-Series 2 Way Coaxial Car Speakers

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NVX ESP65

360W Peak (120W RMS) 6.5" E-Series 2 Way Coaxial Car Speakers

• 180 watts Peak Each, 60 watts RMS Each
• 1/2" PEI (Polyetherimide) Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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NVX NSP65KIT

600W Peak (200W RMS) 6.5" N-Series 2 Way Component Car Speakers

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NVX NSP65KIT

600W Peak (200W RMS) 6.5" N-Series 2 Way Component Car Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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NVX VPRO65 (Sold Individually)

450W Peak (225W RMS) 6.5" V-Series Pro 2 Way Coaxial Loudspeaker

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NVX VPRO65 (Sold Individually)

450W Peak (225W RMS) 6.5" V-Series Pro 2 Way Coaxial Loudspeaker

• 450 watts Peak Each, 225 watts RMS Each
• 1" Aluminum Bullet tweeter
• Competition Grade Paper cone material
• Impedance: 4 ohm
• Sensitivity: 97 dB

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NVX XQS3 v2 (XQS3v2)

200W Peak (100W RMS) 3.5" X-Series v2 NEO Midrange Car Speakers

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NVX XQS3 v2 (XQS3v2)

200W Peak (100W RMS) 3.5" X-Series v2 NEO Midrange Car Speakers

• 100 watts Peak Each, 50 watts RMS Each
• tweeters
• Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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NVX VPRO65HS (Sold Individually)

350W Peak (175W RMS) 6.5" V-Series Pro 2 Way Coaxial Shallow Loudspeaker

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NVX VPRO65HS (Sold Individually)

350W Peak (175W RMS) 6.5" V-Series Pro 2 Way Coaxial Shallow Loudspeaker

• 350 watts Peak Each, 175 watts RMS Each
• 1" Aluminum Horn tweeter
• Competition Grade Paper cone material
• Impedance: 4 ohm
• Sensitivity: 97 dB

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NVX NSP65 - Open Box, Great

540W Peak (180W RMS) 6.5" N-Series 2-Way Coaxial Speakers with 20mm Silk Dome Tweeters

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NVX NSP65 - Open Box, Great

540W Peak (180W RMS) 6.5" N-Series 2-Way Coaxial Speakers with 20mm Silk Dome Tweeters

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB
• Mounting Depth: 2.40"

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NVX XSP652 (Open Box, Great)

600W Peak (200W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters

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NVX XSP652 (Open Box, Great)

600W Peak (200W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters

• 300 watts Max Each, 100 watts RMS Each
• 1" Silk Dome Tweeters
• Lightweight Carbon Fiber cone
• Impedance: 4 ohm
• Sensitivity: 92 dB
• Mounting Depth: 2.52"

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NVX VSP65KIT - Like New (Open Box)

750W Peak (250W RMS) 6.5" V-Series 2-Way Component Speaker System with 25mm Silk Dome Tweeters

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NVX VSP65KIT - Like New (Open Box)

750W Peak (250W RMS) 6.5" V-Series 2-Way Component Speaker System with 25mm Silk Dome Tweeters

• 375 watts Peak Each, 125 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB
• Mounting Depth: 2.51"

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NVX XSP652 (Like New (Open Box))

600W Peak (200W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters

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NVX XSP652 (Like New (Open Box))

600W Peak (200W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters

• 300 watts Max Each, 100 watts RMS Each
• 1" Silk Dome Tweeters
• Lightweight Carbon Fiber cone
• Impedance: 4 ohm
• Sensitivity: 92 dB
• Mounting Depth: 2.52"

10% Off Open Box!

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NVX XQS3 v2 (XQS3v2) (Open Box, Great)

200W Peak (100W RMS) 3.5" X-Series v2 NEO Midrange Speakers with Carbon Fiber Cones

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NVX XQS3 v2 (XQS3v2) (Open Box, Great)

200W Peak (100W RMS) 3.5" X-Series v2 NEO Midrange Speakers with Carbon Fiber Cones

• 100 watts Peak Each, 50 watts RMS Each
• Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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2026-07-27 11:08:20

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• 100 watts Peak Each, 50 watts RMS Each
• Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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NVX NSP65 - Like New (Open Box)

540W Peak (180W RMS) 6.5" N-Series 2-Way Coaxial Speakers with 20mm Silk Dome Tweeters

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NVX NSP65 - Like New (Open Box)

540W Peak (180W RMS) 6.5" N-Series 2-Way Coaxial Speakers with 20mm Silk Dome Tweeters

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB
• Mounting Depth: 2.40"

10% Off Open Box!

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NVX VPRO65 (Sold Individually) (Like New (Open Box))

450W Peak (225W RMS) 6.5" V-Series Pro 2-Way Water Resistant Coaxial Loudspeaker with Bullet Tweeter

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NVX VPRO65 (Sold Individually) (Like New (Open Box))

450W Peak (225W RMS) 6.5" V-Series Pro 2-Way Water Resistant Coaxial Loudspeaker with Bullet Tweeter

• 225 watts RMS
• 1" Aluminum Dome Bullet Tweeter
• Treated Paper cone material
• Impedance: 4 ohm
• Sensitivity: 97 dB

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NVX NSP65KIT + NSP65

600W Peak (200W RMS) 6.5" Component Speaker System + NSP65 6.5" Coaxial Speakers

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NVX NSP65KIT + NSP65

600W Peak (200W RMS) 6.5" Component Speaker System + NSP65 6.5" Coaxial Speakers

• 600 watts Peak Each, 200 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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Install kits available for this speaker

Fits multiple locations in your A4

Front Door
Rear Door

2026-07-27 11:08:20

List price $215.98

-29% $152.98 /set

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Top special offer for this item

40% Off Sound Damping Kit to stop the rattles/vibrations!

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NVX 6.5" Coaxial + 6.5" Component Front and Rear Speaker Upgrade

Package includes 1 pair 6.5" Component + 1 pair 6.5" Coaxial

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NVX 6.5" Coaxial + 6.5" Component Front and Rear Speaker Upgrade

Package includes 1 pair 6.5" Component + 1 pair 6.5" Coaxial

• Includes NVX V-Series Coaxial Speakers and Component System
• NVX VSP65KIT 6.5" Component System
• Peak Power: 140W
• RMS Power: 70W
• NVX VSP65 6.5" Coaxial Speakers
• Peak Power: 200W
• RMS Power: 100W

Purchase $400 or More of NVX and Save 15%!

Free shipping in USA. Provide zip for delivery date.

Save $8 on install kits for this speaker

Fits multiple locations in your A4

Front Door
Rear Door

152

2026-07-27 11:08:20

List price $263.98

-20% $209.98

In stock

Only 2 Left!

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Limited time!

NVX VSP65 Speakers with Installation Accessories

NVX 6.5" Coaxial Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

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NVX VSP65 Speakers with Installation Accessories

NVX 6.5" Coaxial Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

• 25mm Silk Soft Dome Tweeter
• Mounting Depth: 2-1/2"
• Lightweight Polypropylene Woofer Cone
• 4 Ohm Impedance
• Sensitivity: 89dB

Purchase $400 or More of NVX and Save 15%!

Free shipping in USA. Provide zip for delivery date.

Save $8 on install kits for this speaker

Fits multiple locations in your A4

Front Door
Rear Door

321

2026-07-27 11:08:20

List price $207.70

-31% $143.33 /pair

In stock

Only 2 Left!

Add to Cart

• 25mm Silk Soft Dome Tweeter
• Mounting Depth: 2-1/2"
• Lightweight Polypropylene Woofer Cone
• 4 Ohm Impedance
• Sensitivity: 89dB

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FAQ for Front Door Speakers in 2018 A4

Q: Can I upgrade or change the Front Door Speakers in 2018 Audi A4?

A: Yes this page includes all the best Front Door Speakers that work in your A4.

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Front Door for 2018 Audi A4

NVX NSP65

NVX NSP65

NVX VSP65KIT

NVX VSP65KIT

NVX XQS65KIT Version 2 (XQS65KITv2)

NVX XQS65KIT Version 2 (XQS65KITv2)

NVX VSP65

NVX VSP65

NVX XSP652

NVX XSP652

NVX ESP65

NVX ESP65

NVX NSP65KIT

NVX NSP65KIT

NVX VPRO65 (Sold Individually)

NVX VPRO65 (Sold Individually)

NVX XQS3 v2 (XQS3v2)

NVX XQS3 v2 (XQS3v2)

NVX VPRO65HS (Sold Individually)

NVX VPRO65HS (Sold Individually)

NVX NSP65 - Open Box, Great

NVX NSP65 - Open Box, Great

NVX XSP652 (Open Box, Great)

NVX XSP652 (Open Box, Great)

NVX VSP65KIT - Like New (Open Box)

NVX VSP65KIT - Like New (Open Box)

NVX XSP652 (Like New (Open Box))

NVX XSP652 (Like New (Open Box))

NVX XQS3 v2 (XQS3v2) (Open Box, Great)

NVX XQS3 v2 (XQS3v2) (Open Box, Great)

NVX NSP65 - Like New (Open Box)

NVX NSP65 - Like New (Open Box)

NVX VPRO65 (Sold Individually) (Like New (Open Box))

NVX VPRO65 (Sold Individually) (Like New (Open Box))

NVX NSP65KIT + NSP65

NVX NSP65KIT + NSP65

NVX 6.5" Coaxial + 6.5" Component Front and Rear Speaker Upgrade

NVX 6.5" Coaxial + 6.5" Component Front and Rear Speaker Upgrade

NVX VSP65 Speakers with Installation Accessories

NVX VSP65 Speakers with Installation Accessories

FAQ for Front Door Speakers in 2018 A4

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