Alpine S2-S50 with Sound Damping

340W Peak (110W RMS) 5.25" S-Series 2-way Coaxial Car Speakers + NVX SDSK2 Sound Damping

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• 170 watts Peak Each, 55 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohms
• Sensitivity: 87 dB

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Experience the Era of High-Resolution Audio

We greatly admire Alpine's dedication to bringing high-resolution audio to more car enthusiasts. Drawing upon the technological advancements of their esteemed F#1 Status Series, Alpine's Next Generation S-Series car speakers offer an enticing opportunity to indulge in the exquisite intricacies of your beloved high-resolution audio files, all at an affordable price. While we recommend utilizing aftermarket power for optimal performance, these speakers deliver exceptional results even when powered by factory systems, thanks to their remarkably broad frequency response that guarantees a rich and authentic sound experience.

Unleashing Innovation through Materials

Alpine has infused these speakers with unmatched capabilities by incorporating highly efficient materials and exclusive design elements. The lightweight woofer cone, meticulously crafted from a blend of polypropylene, glass fiber, and mica materials, effortlessly produces the perfect balance between high output and low distortion, essential for outstanding high-resolution performance. Amplifying the bass to its finest, the woofer's High Amplitude Multi-Roll (HAMR) surround allows for maximum cone movement, bringing out the best in low-frequency reproduction. Moreover, the inclusion of a 3/4" silk dome tweeter ensures that you won't miss a single detail in the high-frequency range, enhancing your audio experience beyond what factory-installed speakers can offer.

Alpine S2-S50

170W Peak (55W RMS) 5.25" S-Series 2-way 4-ohm Hi-Res Coaxial Car Speakers
Quantity: 1

Product Details:

  • 5-1/4" S Series 2-way Coaxial Car Speakers
  • Power Handling:
    • Peak: 340 watts per pair / 170 watts each
    • RMS: 110 watts per pair / 55 watts each
  • Hi-Res Audio Certified
  • Lightweight Glass Fiber Composite cone material
  • High-Amplitude Multi-Roll (HAMR) speaker surround
  • 0.8" Cloth Soft Dome tweeters
  • Large voice coil
  • Ferrite magnet motor structure
  • Top-mount Depth: 2"
  • Cutout Dimensions: 4-1/2"
  • Impedance: 4 ohms
  • Frequency Response: 65 - 40,000 Hz
  • Sensitivity: 87 dB
  • Speaker grilles optional, sold separately
  • Authorized Internet Dealer
  • MFR #: S2-S50
  • 1-year Manufacturer's Warranty

  • Priced Per 2 Pairs (4 Speakers)

NVX SDSK2 - 90mil 2.3mm THICK

Speaker Kit - 1.38 Square Feet of Sound Damping (Sound Deadening) Material (Two 10" x 10" Pieces)
Quantity: 1

Product Features

  • Two 10" x 10" Pieces of Sound Dampening Material
    • 90.55mil thick (2.3mm)! There are cheaper, inferior solutions at 50-80mil, but we do not recommend that thin of a solution as it will not perform as well.
  • Great sound damping for installing with car door speakers
  • 1.38 Square feet total
  • Made from 100% Butyl Rubber
  • Eliminates road noise
  • Quiets vibrations
  • Increases sound quality and output of car audio system
  • Stops rattles
  • Increases SPL
  • Reduces heat
  • Easy to form aluminum conforms to desired area of vehicle with ease
  • Four step peel and stick design for easy installation
  • Up to 30% thicker than the leading competitors
  • Dimensions (each piece): 10"L x 10"W
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product history:

Alpine S2S50_SDSK2 thumbnail
(newest, current model)
Alpine S-S50 thumbnail
(previous model, replaced by Alpine S2-S50 with Sound Damping)
Alpine SPS-510 thumbnail
(previous model, replaced by Alpine S-S50)
Alpine SPS-500 thumbnail
(previous model, replaced by Alpine Type-S SPS-510)
Alpine SPS-13C2 thumbnail
(previous model, replaced by Alpine SPS-500)

Specifications & Details

Speaker Specifications
CTA-2031 Compliant
S Series
Total PEAK Per Pair/Set
340 watts
RMS Power Handling
55 watts
Peak Power Handling
170 watts
Woofer Surround
Woofer Composition
Tweeter Composition
Tweeter Size
Tweeter Design
2-way Coaxial
Speaker Size
Priced Per
Total RMS Per Pair/Set
110 watts
87 dB
Number of Speakers
Cutout Dimensions
Top-Mount Depth (Mounting Depth)
Magnet Type
Shallow Mount Installation
Impedance (Per Voice Coil)
4 ohms
Frequency Response
80 - 22000 Hz
General specifications
Speaker Grilles
Hi-Res Certified
Marine Certified
Sound Damping Specifications
Material Use
Vibration Dampener
Total Amount of Material
1.38 square feet
Material Thickness
Installation Location
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


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Customer Ratings & Reviews

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Customer Reviews

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good stuff

The following review is for SDSK2, which is a part of the bundle you are viewing.

I got this free when i ordered my 4x6 speakers i installed it on the rear set no space in the front openings so far so good still sticking to the metal and no rattles.

By MIGUEL on January 20, 2014


found this helpful.

Nice Wiring Kit

The following review is for SDSK2, which is a part of the bundle you are viewing.

This is a nice quality kit at a fair price. It had everything that was needed to complete the task.

I had purchased another kit that I really wasn't happy with, and decided to purchase this one. I liked the attention to detail in the preparation of this kit. Recommended.

By Mr Sparkie on September 20, 2014


found this helpful.

Works pretty good

The following review is for SDSK2, which is a part of the bundle you are viewing.

I bought this product for my trucks doors, and I noticed it's thicker than other sound dampening material I've used before that I paid a lot more for. This is a great product at a great price

By Zach on March 9, 2014


found this helpful.


The following review is for SDSK2, which is a part of the bundle you are viewing.


By RANDALL on February 24, 2014


found this helpful.

Easy to use, good performance!

The following review is for SDSK2, which is a part of the bundle you are viewing.

We used this in conjunction with a component speaker upgrade to a 2003 VW Passat. This material is simple to use (if you can work scissors and peel off adhesive backing, you can handle this stuff!), and you can easily cut it to any size or shape to fit your particular vehicle. Installing this material was the easiest part of our whole car audio upgrade project!

By Tom on June 20, 2013


found this helpful.


The following review is for SDSK2, which is a part of the bundle you are viewing.

Very nice sound dampening material easy to install and gives a great added depth to the sound of yr system, deeper bass and mids and also minimizes the resonance of the factory locations

By Jason on October 4, 2014


found this helpful.

sound deadener

The following review is for SDSK2, which is a part of the bundle you are viewing.

Amazing stuff I wish I could afford to cover my whole truck with it!

By Kent on September 28, 2012


found this helpful.

Great Buy when 50% off

The following review is for SDSK2, which is a part of the bundle you are viewing.

Now this product is good quality! I highly recommend this product!

By Tony on December 8, 2014


found this helpful.

Nvx = quality at the best price.

The following review is for SDSK2, which is a part of the bundle you are viewing.

I'm so happy with all my NVX products. They are always the best in quality and price. No smell and if it's not a lot you can apply it without a roller. (I used my hands and the back of a screw driver to really smooth it out)

By Ryan on January 19, 2014


found this helpful.

Does the job great

The following review is for SDSK2, which is a part of the bundle you are viewing.

I would definitely. Recommend this it was part of a promotional. Thing used alot of other brands would say works just as well if not better glad i did the deal . Now i can get more for cheaper. "Get it you wont be disappointed "

By Richard on January 13, 2015


found this helpful.

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