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  1. Home
  2. Car Audio & Electronics
  3. Car Subwoofers
  4. Car Subwoofer Boxes
  5. Car Subwoofers with a Box (Loaded Sub Boxes)
  6. Sealed Enclosure Boxes with Car Subwoofers
  7. NVX NE81S_48CWRT84

See all parts that fit your 1961 Electra

NVX NE81S w/Kicker CWRT84 (48CWRT84)

Single 8" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 0.45 Cu. Ft. with Polyfil and NVX Logo w/ 600W Peak (300W RMS) 8” CompRT Shallow Subwoofer

5
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• 8" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: .45 cubic feet
• Premium Black Carpet with Black NVX Logo

Learn more about the ne81s_48cwrt84
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Universal – fits most vehicles.

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List price $275.98
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$199.95

 with warranty
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Description

NVX brand icon

Authorized dealer

NVX NE81S

Single 8" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 0.45 Cu. Ft. with Polyfil and NVX Logo
Quantity: 1

Product Details:

  • Not compatible with NVX VC-Series Subwoofers
  • 8" Single Sealed Subwoofer Enclosure
  • Made from 3/4" Medium Density Fiberboard (MDF) construction
  • Built with precision CNC technology for exceptional accuracy
  • Pre-lined with Poly-Fil for improved acoustic response
  • Premium Black Carpet with Black NVX Logo
  • Spring Loaded Push Terminals
  • Maximum subwoofer mounting depth: 8-5/8"
  • Subwoofer cutout diameter: 7-3/8"
  • Internal box volume: .45 cubic feet
  • Dimensions: 11.25" D x 11.50" W x 11.50" H
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty

Kicker CWRT84 (48CWRT84)

600W Peak (300W RMS) 8" CompRT Series Dual 4-ohm Shallow Car Subwoofer
Quantity: 1

Product Details:

  • 8" Dual 4 ohm CompRT Series Subwoofer
  • Power Handling:
    • Peak: 600 watts
    • RMS: 300 watts
  • ANSI/CTA-2031-A compliant
  • UV-Treated Polypropylene cone
  • Utilizes one-piece SoloKon cone reinforcement technology
  • UV-resistant Santoprene Surround with signature red double stitching
  • Ultra-thin sub fits under the seat or behind the back bench
  • Advanced suspension and heat management system
  • Forced-Air Cooling to help subwoofers run 20% cooler
  • Frequency Response: 30 - 500 Hz
  • Sensitivity: 81.8 dB
  • Recommended sealed box volume: 0.2 cubic feet - 1.0 cubic feet
  • Recommended ported box volume: 0.8 cubic feet - 1.2 cubic feet
  • Top-mount depth: 2-11/16"
  • Cutout diameter: 6-15/16"
  • Mesh grilles: Kicker 52GR8 (sold separately)
  • Grille insert: Kicker CWR8G (sold separately)
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

    • Sold Individually

PDF Icon Kicker 48CWRT84 owner’s manual

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Specifications & Details

Subwoofer Specifications
Series
CompRT Series
Subwoofer Size
8"
RMS Power Handling
300 watts
Peak Power Handling
600 watts
Woofer Composition
UV-Treated Polypropylene
Woofer Surround
Santoprene Rubber
Sensitivity
81.8 dB
Frequency Response
30 - 500 Hz
Subwoofer Design
Round / Circle
Enclosure Specifications
Box Type
Sealed
Number of Subwoofers
1
Box Style/Shape
Square/Rectangle
Wood Thickness
3/4"
Number of Terminals
1
Terminal Type
Binding posts (banana clip ready)
Box Exterior Color
Black
Box Finish
Carpet
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details

Manufacturer:

NVX

Model Number:

NE81S_48CWRT84

Weight:

23.00lbs

Internal SKU:

ne81s_48cwrt84

Internal Product ID:

228675

Customer Ratings & Reviews

NVX NE81S w/Kicker CWRT84 (48CWRT84) thumbnail image
5
5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%
Durability
5
Value
4.4
Features
5
Design
5
Usability
5

Customer Photos & Videos

Customer Reviews

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The following review is for CWRT84, which is a part of the bundle you are viewing.
By sean on March 17, 2023 Checkmark Icon Verified purchase

60 found this helpful

Report abuse

Solid sub

The following review is for CWRT84, which is a part of the bundle you are viewing.

Sub is very well built, great sound for 8" sub. Very happy with it.

By Jason on January 31, 2024 Checkmark Icon Verified purchase

42 found this helpful

Report abuse

Sounds good.

The following review is for CWRT84, which is a part of the bundle you are viewing.

Not bad for an 8”.

By Anthony on October 25, 2024 Checkmark Icon Verified purchase

10 found this helpful

Report abuse

The following review is for NE81S, which is a part of the bundle you are viewing.
By Todd on March 20, 2026 Checkmark Icon Verified purchase

Report abuse

The following review is for CWRT84, which is a part of the bundle you are viewing.
By Jacob on November 5, 2025 Checkmark Icon Verified purchase

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