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NVX VSP525KIT with Sound Damping

750W Peak (250W RMS) 5.25" V-Series 2-Way Component Speaker System with 25mm Silk Dome Tweeters + NVX SDBSK2 Premium Sound Damping

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• 375 watts Peak Each, 125 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 2.04"

Learn more about the vsp525kit_sdbsk2
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2026-07-27 11:08:20
List price $138.73
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$110.48

 with warranty
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Description


NVX brand icon

Authorized dealer

5.25 Inch Component Speaker System
Adjustable Crossover 25 MM Tweeters Woven Tinsel Leads
Polypropylene Cone

NVX VSP525KIT

750W Peak (250W RMS) 5.25" V-Series 2 Way Component Car Speakers
Quantity: 1

Product Details:

  • 5-1/4" V Series 2-way Component System Car Speakers
  • Power Handling:
    • Peak: 750 watts per set / 375 watts each side
    • RMS: 250 watts per set / 125 watts each side
  • Polypropylene cone material
  • Nitrile Butadiene Rubber NBR speaker surround
  • 1" Silk Dome tweeters
  • CEA-2031 compliant: Yes
  • 1.5" voice coil
  • Ferrite magnet motor structure
  • Woven tinsel leads
  • Integrated crossover
  • Top-mount Depth: 2.04"
  • Cutout Dimensions: 3.66"
  • Impedance: 4 ohm
  • Frequency Response: 100 - 20000 Hz
  • Sensitivity: 86 dB
  • Optional NVX XGR525 speaker grilles (Sold separately)
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Per Complete Component System: 2 midwoofers, 2 tweeters and 2 crossover networks.

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
V Series
Total PEAK Per Pair/Set
750 watts
RMS Power Handling
125 watts
Peak Power Handling
375 watts
Woofer Surround
Nitrile Butadiene Rubber NBR
Woofer Composition
Polypropylene
Tweeter Composition
Silk
Tweeter Size
1"
Tweeter Design
Dome
Design
2-way Component System
Speaker Size
5-1/4"
Priced Per
Pair
Total RMS Per Pair/Set
250 watts
Sensitivity
86 dB
Number of Speakers
2 Speakers + 2 Tweeters
Cutout Dimensions
3.66"
Top-Mount Depth (Mounting Depth)
2.04"
Magnet Type
Ferrite
Shallow Mount Installation
No
Voice Coil Diameter
1.5"
Impedance (Per Voice Coil)
4 ohm
Frequency Response
100 - 20000 Hz
General specifications
Speaker Grilles
Optional (Accessory Required and Sold Separately)
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:

VSP525KIT_SDBSK2

Weight:

7.50lbs

Internal SKU:

vsp525kit_sdbsk2

Internal Product ID:

207233

Customer Ratings & Reviews


NVX VSP525KIT with Sound Damping thumbnail image

5 star
87%
4 star
12%
3 star
1%
2 star
0%
1 star
0%



Durability
4.8
Value
4.9
Features
4.8
Design
4.8
Usability
4.9

Customer Reviews

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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


Good price

The following review is for VSP525KIT, which is a part of the bundle you are viewing.

I bought to replace my 1999 oldsmobile eighty eight stock component speakers. When I purchased I hadn't yet taken off the door panels to look at old speakers, I just used the speaker fit ode here on sonic electronix to find a pair that would fit my car. Well what I didn't realize is that the old tweeters had a very specific bracket which the nvx set did not include. This set of nvx seems to be more towards custom tweeter installs with options to mount flushed or exposed.Anyways, I was worried at first because Id spent long enough deciding what to buy and at this point justwanted to hear the dang things! I ended up using the thickest duct tape I've ever owned to hold me down, and once pressed up against the door they didn't make a rattle or move so it seems to have worked. The woofers on the other hand screwed right in. Overall I am happy with this buy and would recommend them

By David on December 26, 2014

65 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

59 found this helpful


NVX SDBSK2 Premium Stealth Black

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

Thick and heavy. I was suprised with the actual quality. For the price they’re great quality

By Anonymous on June 22, 2018

61 found this helpful


Good product

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

Sticky and did hook well to the cars body . Got it for free with my speakers purchase. Sonic electronix for life

By Anonymous on October 6, 2019

58 found this helpful


took a chance

The following review is for VSP525KIT, which is a part of the bundle you are viewing.

I took a chance on these based on their reviews, i usually would buy a big brand but these seemed legit. I bought these and the nvx 6x9s. After hooking everything up it sounded pretty good but it was just my crappy head unit powering them, so when i bought an amp wow these things came to life. my whole truck is rocking now!

By Mitchell on December 16, 2014

60 found this helpful


incredible.

The following review is for VSP525KIT, which is a part of the bundle you are viewing.

i have recently purchased and installed this kit so i figured a review would be worthy for this.
upon opening the package i couldn't help but be amazed about how much it weighed for just a 5 1/4 component kit. the magnet on the woofers have a lot of weight. the tweeters you can really see the quality in them its really hard to explain just buy a nvx tweeter and you'll see. the cross overs are clearly labeled and make for a really clean install. upon hearing them in action i was blown away the mids sound punchy as heck some times i feel like i have a set of decent ten inch woofers in my door and the tweeters are loud as heck thanks once again sonic and nvx i truly am not ashamed of this purchase.

By alexander on March 6, 2014

62 found this helpful


NVX SDBSK2 Premium Stealth Black

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

For the price, I wish it came with a bit more of the material compared to other packages, but it definitely does what it's supposed to and will make a noticeable difference if you knock on the door/panel where it was placed vs where it wasn't.

By Anonymous on June 12, 2018 Checkmark Icon Verified purchase

55 found this helpful



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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • 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.