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NVX NSP4 with Sound Damping

300W Peak (100W RMS) 4" N-Series 2-Way Coaxial Car Speakers with 20mm Silk Dome Tweeters + NVX SDBSK2 Premium Sound Damping

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• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 1.88"

Learn more about the nsp4_sdbsk2
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2026-07-27 11:08:20
List price $78.73
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$55.48

 with warranty
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NVX - Worth the Envy - Direct to Consumer Car Audio

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Description


NVX brand icon

Authorized dealer

NVX 2-Way 4 Inch Speakers
Integrated Crossovers 20 MM Tweeter Rubber Surround
Polypropylene Cone

NVX NSP4

300W Peak (100W RMS) 4" N-Series 2-Way Coaxial Car Speakers
Quantity: 1

Product Details:

  • 4" N-Series 2-way Coaxial Car Speakers
  • Power Handling:
    • Peak: 300 watts per pair / 150 watts each
    • RMS: 100 watts per pair / 50 watts each
  • Polypropylene cone material
  • Nitrile Butadiene Rubber NBR speaker surround
  • 3/4" Silk Dome tweeters
  • CEA-2031 compliant: Yes
  • 1" voice coil
  • Ferrite magnet motor structure
  • Top-mount Depth: 1.88"
  • Cutout Dimensions: 3.66"
  • Impedance: 4 ohm
  • Frequency Response: 94 - 20000 Hz
  • Sensitivity: 86 dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Per Pair

PDF Icon Check out the N-Series Coaxial Speakers Owner's Manual

NVX SDBSK2 Premium Stealth Black

91 mil 1.38 sq ft Car Speaker Sound Deadening Kit (Two 10" x 10" Sheets)
Quantity: 1

Product Details:

  • 1.38 square feet sound deadening kit
  • Solid black design for any stealth car audio installation
  • Core is based with 100% pure butyl rubber to withstand extreme heat
  • No asphalt, tar, or cheap fillers - will not outgas, melt or fall off
  • Waterproof barrier protects against moisture damage and mechanical oils
  • Up to 30% thicker than cheap 50–80 mil alternatives
  • Flexible aluminum backing contours tightly to complex door panels and vehicle curves with ease
  • Structural damping kills unwanted sheet metal resonance caused by heavy mid bass
  • Seals the door cavity to drastically increase speaker bass response and clarity
  • Lowers cabin ambient noise so you hear your music instead of the highway
  • Reflects radiant heat to help keep your vehicle interior cooler
  • Simple three step peel and stick installation process makes upgrading your sound quick
  • Combine this kit with NVX SDRLR1 Rubber Roller for easy installation
  • Pack includes two 10" x 10" sheets
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Specifications:

  • Install Location: Speaker
  • Material Thickness: 0.091 (2.3 mm)
  • Amount of Material: 1.38 square feet
  • Material Use: Vibration Dampener
  • Optimal Performance Temperature: 14°F to 140°F
  • Rated Temperature Range: -75°F to 450°F
  • Application Temperature: 60°F to 90°F
  • Dimensions (each piece): 10"L x 10"W

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Specifications & Details


Speaker Specifications
CTA-2031 Compliant
Yes
Series
N-Series
Total PEAK Per Pair/Set
300 watts
RMS Power Handling
50 watts
Peak Power Handling
150 watts
Woofer Surround
Nitrile Butadiene Rubber NBR
Woofer Composition
Polypropylene
Tweeter Composition
Silk
Tweeter Size
3/4"
Tweeter Design
Dome
Design
2-way Coaxial
Speaker Size
4"
Priced Per
Pair
Total RMS Per Pair/Set
100 watts
Sensitivity
86 dB
Number of Speakers
2
Cutout Dimensions
3.66"
Top-Mount Depth (Mounting Depth)
1.88"
Magnet Type
Ferrite
Shallow Mount Installation
No
Voice Coil Diameter
1"
Impedance (Per Voice Coil)
4 ohm
Frequency Response
94 - 20000 Hz
General specifications
Speaker Grilles
No
Color
Black
Hi-Res Certified
No
Marine Certified
No
Sound Damping Specifications
Secondary Use
Vibration Dampener
Material Use
Sound Absorber
Total Amount of Material
1.38 square feet
Installation Location
Speaker
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

NVX

Model Number:

NSP4_SDBSK2

Weight:

4.80lbs

Internal SKU:

nsp4_sdbsk2

Internal Product ID:

207223

Customer Ratings & Reviews


NVX NSP4 with Sound Damping thumbnail image

5 star
92%
4 star
8%
3 star
0%
2 star
0%
1 star
0%



Durability
4.9
Value
5
Features
4.9
Design
4.9
Usability
5

Customer Reviews

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Impressive

The following review is for NSP4, which is a part of the bundle you are viewing.

I had to replace my cheap, blown out dash speakers in my 88 Toyota pickup. Impressed with the highs and the lows. Had them tweeked with the pioneer head unit until my ears started to feel uncomfortable at times. Really clear sound with these loud little bangers.

By Timmy on April 8, 2014

100 found this helpful


More Greatness!!

The following review is for NSP4, which is a part of the bundle you are viewing.

I replaced my P132's with these and am overjoyed with my purchase! They're cleaner, louder and have a surprising amount of bass! The install was a breeze thanks to my NVX Sound Deadener! Sealed so lovely! My dash is happy now and my volume knob is excited to be able to be turned further than before!! LOL! NVX... Second to None!

By Eliseo on July 9, 2013

93 found this helpful


Great performance

The following review is for NSP4, which is a part of the bundle you are viewing.

Great amp, I love the size that it comes in so it fits easy almost anywhere. I love the two terminal feature. As long as you have it wired correctly, it barley heats up. Another positive is the connector it comes for lower gauge wire

By De28 on September 17, 2013

90 found this helpful


Best 4 inch 4 ohm Speakers I've heard!

The following review is for NSP4, which is a part of the bundle you are viewing.

These speakers have the best bass I've heard out of 4 inch speakers!!!

By Marty on March 2, 2015

87 found this helpful


Nvx

The following review is for NSP4, which is a part of the bundle you are viewing.

The sound is greatthe quality is good and the price excellent!!

By Miguel on April 12, 2015

82 found this helpful


Seriously clear and loud

The following review is for NSP4, which is a part of the bundle you are viewing.

NVX is my new brand of choice. I recommend these to people looking for An amazing musical experience. I've ran them off a factory radio, Kenwood decks and amplified them with h 50 W RMS and they impressed me with every setup. For the price NVX is untouchable.

By david on April 30, 2015 Checkmark Icon Verified purchase

76 found this helpful


Great deal

The following review is for SDBSK2, which is a part of the bundle you are viewing.

Got this product free with the purchase of a pair of speakers it helps out a lot looks more professional and sounds cleaner definitely give it a try for your next project.

By Anonymous on August 8, 2019

62 found this helpful


Don't go without it

The following review is for SDBSK2, which is a part of the bundle you are viewing.

This really helps with overall sound quality, especially mid-bass in my experience. NVX offers excellent quality at better prices are than other popular sound deadening brands.

By Anonymous on September 9, 2019 Checkmark Icon Verified purchase

60 found this helpful


Very Thick Dynamat

The following review is for SDBSK2, which is a part of the bundle you are viewing.

This product is very thick compared to cheap versions. Priced excellent. If you want to reduce any vibration or road sound, choose this!

By Adrian on June 21, 2020 Checkmark Icon Verified purchase

59 found this helpful


Very pleased

The following review is for SDBSK2, which is a part of the bundle you are viewing.

I am glad I went with this brand. Easy application and works great in keeping my Corolla quiet and audio clean.

By Anonymous on November 26, 2019

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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
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  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.