Garage
Shop

See all parts that fit your 2004 X5

NVX NE81P w/ Sundown Audio SW-SAV38D2

Single 8" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 0.75 Cu. Ft. with Polyfil and NVX Logo w/ 500W RMS 8" SA Series Dual 2-ohm Subwoofer

NVX
Shop all NVX
Limited time!
Out of stock
highlight-star-icon

• 8" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: .75 cubic feet
• Premium Black Carpet with Black NVX Logo

Learn more about the ne81p_sav38d2
Universal fit Icon

Universal – fits most vehicles.

Similar items | Update vehicle | Vehicle store
2026-07-27 11:08:20
List price $449.98
Thanks , You Pay:
-20%

$359.98

 with warranty
Starting at $33/mo or 4 payments of $90 Buy now, pay later and installment payment plans are offered by Afterpay and Affirm. Learn more

Heads up

Your vehicle can use this product in multiple locations. Only a quantity of one can be selected from the product page. You will have the option to adjust the quantity within your cart.

Purchase $400 or More of NVX and Save 15%!
Quantity
Out of stock - Order risk-free, cancel any time.
Brand new

Acima Logo

No Credit Option

Flexible Lease Payments

Early Purchase Options

Quick Approval Decision

Extend logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Hassle-free immediate replacement within minutes!
  • Easy online claims 24/7
  • Covers product breakdowns and failures
Swoosh Icon Icon of Swoosh

For over 25 years, we've been your X-Factor – the team dedicated to having the biggest impact on your shopping experience!

Award winning icon
Award-Winning Service
Shipping icon
FREE Shipping Orders $49+
60 days return policy icon
60-Day Easy Returns
lowest price guarantee icon
Guaranteed Lowest Price
inHouseExpert
In-House Experts
NVX - Worth the Envy - Direct to Consumer Car Audio

Loading...
PRO-X6.4BMPK main

DS18 PRO-X6.4BMPK

1000W Peak (500W RMS) 6.5” PRO-X Series 4-ohm Pro Audio Component Speakers Set

4
43DSC504 main

Kicker DSC50 (43DSC504)

400W Peak (100W RMS) 5.25" DS Series 2-way 4-ohm Coaxial Car Speakers (DSC504)

17
-11.77%

$74.99

List price $84.99

MM-50L main

Deaf Bonce Machete MM-50L

320W Peak (196W RMS) 5.2" Machete Series Midrange 4-ohm Speakers

1
DMX125BT main

Kenwood DMX125BT

6.75" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth

4
-26.30%

$199.00

List price $270.00

Dynavin D9-E53-64GB

7" Custom-Fit Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay and Android Auto for select 2000-2006 X5 (SiriusXM Ready)

Limited time!

JL Audio C2-600cw (Sold Individually)

60W RMS 6” C2 Series Component 4-ohm Car Midwoofer

-15.63%

$134.99

List price $159.99

Description


NVX brand icon

Authorized dealer

NVX NE81P

Single 8" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 0.75 Cu. Ft. with Polyfil and NVX Logo
Quantity: 1

Product Details:

  • Not compatible with NVX VC-Series Subwoofers
  • 8" Single Ported 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: .75 cubic feet
  • Port Tuning Frequency (Fb): 38 Hz
  • Dimensions: 15.25" D x 15.00" W x 11.50" H
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty

Port Specifications:

  • Tuning Frequency: 38 Hz
  • Port Width: 1"
  • Port Height: 10"
  • Port Length: 21"

Sundown Audio SA-8 v.3 D2 8" (SA8V3D2)

1200W Peak (600W RMS) 8" SA Series Dual 2-ohm Car Subwoofer (SW-SAV38D2)
Quantity: 1

Product Details:

  • 8" Dual 2 ohm SA Series Subwoofer
  • Power Handling:
    • Peak: 1200 watts
    • RMS: 600 watts
  • Treated Paper Cone
  • Treated Foam Surround
  • Vented magnetic gap with 16 chamfered vents
  • Large aluminum Faraday ring for smooth acoustic response
  • Patented high-strength cast aluminum frame
  • Low distortion motor construction
  • High-temperature voice coil wire
  • Spring-loaded terminals for easy connection
  • Stitched-on “XL” tinsel lead wires
  • 16 mm Xmax
  • Double Stacked magnet motor structure
  • Resonance Frequency (Fs): 38.29 Hz
  • Sensitivity: 82.79 dB
  • Recommended sealed box volume: 0.3 cubic feet
  • Recommended ported box volume: 0.65 cubic feet
  • Top-mount depth: 6.625"
  • Cutout diameter: 7.375"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Individually


Loading...
Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

124
-33.36%

$79.96

List price $119.99

DMH-1800NEX main

Pioneer DMH-1800NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready

3
-19.05%

$339.99

List price $420.00

UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

Limited time!
Club 622 main

JBL Club 622

360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers

5
-28.58%

$99.95

List price $139.95

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

28
-10.53%

$84.99

List price $94.99

Limited time!
DMH-W3050NEX main

Pioneer DMH-W3050NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)

1
-24.20%

$469.99

List price $620.00

DB652 main

Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

12
-9.16%

$109.00

List price $119.99

XED62 main

Cerwin-Vega XED62

600W Peak (70W RMS) 6.5" XED Series 2-Way Coaxial 4-ohm Speakers

15
-16.67%

$49.99

List price $59.99

PNW-65CS2 main

AudioControl PNW-65CS2

250W Peak (200W RMS) 6.5″ PNW Series 2 Way Component 3-ohm Speakers

4
-5.90%

$319.00

List price $339.00


This product is temporarily out of stock. May we recommend...

CP210-W0v3 small

JL Audio BassWedge CP210-W0v3

•Dual 10" 10W0v3-4 Loaded Ported Enclosure
• 1200W Peak
• 600W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

(9)

$274.99

List price $349.99

DL7R122 small

Kicker DL7R122 (45DL7R122)

• Ported enclosure with 2 12" Solo-Baric L7R Series Subwoofer
• 1200 watts RMS (2400 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 33-3/4" L x 15-7/8" H x 15-1/4" W x 20-3/8" W2

(8)

$519.96

List price $699.99

47QL7R122 small

Kicker 47QL7R122

• Ported enclosure with 4 12" Solo-Baric L7R Series Subwoofer
• 2400 watts RMS (4800 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 28" L x 20-1/4" H x 35-7/8" W

(2)

$1199.96

List price $1599.99

JBLBassPro 12 small

JBL BassPro 12

• 12" Amplified Loaded Subwoofer System
• 150 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs

(1)

$364.95

List price $419.95

CP112-W0v3 small

JL Audio BassWedge CP112-W0v3

• 600W Peak
• 300W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

(13)

$229.99

List price $279.99

P1-2X12 small

Rockford Fosgate Punch P1-2X12

• Two 12" Punch Series Stage 1 Subwoofers
• Kevlar Reinforced Paper Cone
• Tear and Fatigue Resistant
• Proprietary Spider Venting/Cooling Technique
• Solid 5/8" MDF Construction

(17)

$439.99

List price $489.99

CP110-W0v3 small

JL Audio BassWedge CP110-W0v3

• 600W Peak
• 300W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

(12)

$179.99

List price $229.99

CP212-W0v3 small

JL Audio CP212-W0v3

• Dual 12" 12W0v3-4 Loaded Ported Enclosure
• 1200W Peak
• 600W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

(14)

$349.99

List price $449.99

DL7S122 small

Kicker DL7S122 (44DL7S122)

• Ported enclosure with 2 12" Solo-Baric L7S Series Subwoofer
• 1500 watts RMS (3000 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 33-3/4" L x 16" H x 16-1/4" W x 19-1/2" W2

(14)

$849.99

List price $949.99

VL7S122 small

Kicker VL7S122 (44VL7S122)

• Ported enclosure with 1 12" Solo-Baric L7S Series Subwoofer
• 750 watts RMS (1500 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 18-3/4" L x 16" H x 14-3/4" W x 17-7/8" W2

(10)

$499.99

List price $549.99

Specifications & Details


Subwoofer Specifications
Series
SA Series
Subwoofer Size
8"
RMS Power Handling
500 watts
Sensitivity
82.79 dB
Subwoofer Design
Round / Circle
Enclosure Specifications
Box Type
Ported
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:

NE81P_SAV38D2

Weight:

50.90lbs

Internal SKU:

ne81p_sav38d2

Internal Product ID:

228861

Customer Ratings & Reviews


NVX NE81P w/ Sundown Audio SW-SAV38D2 thumbnail image

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
4
Value
5
Features
4
Design
5
Usability
5

Customer Photos & Videos


Customer Reviews

Sort by:

Loading...

The following review is for NE81P, which is a part of the bundle you are viewing.
By Eliseo on June 23, 2026 Checkmark Icon Verified purchase


Looks good, sounds good at a good price

The following review is for NE81P, which is a part of the bundle you are viewing.

I'm not an expert, but this enclosure impressed me.
Nice, black carpeting... Lettering is matte black, not blue like the online pictures... Which is better IMO. Enclosure has some weight to it, which makes it feel heavy duty.
This enclosure was the perfect volume size for my P3 subwoofer, and it sounds great.
If I could improve on this box, I would say the terminals could have been installed more straight instead of at an angle. It also could've been installed more toward the bottom. But those are minor gripes. I'm happy with this box and what I paid for it.

By Lee on June 16, 2026 Checkmark Icon Verified purchase


The following review is for NE81P, which is a part of the bundle you are viewing.
By Abram on May 21, 2026 Checkmark Icon Verified purchase
2017 Jeep Renegade


The following review is for SW-SAV38D2, which is a part of the bundle you are viewing.
By Edgar on May 7, 2025 Checkmark Icon Verified purchase


The following review is for SW-SAV38D2, which is a part of the bundle you are viewing.
By Jose on May 3, 2025 Checkmark Icon Verified purchase


Sundown sav3d8

The following review is for SW-SAV38D2, which is a part of the bundle you are viewing.

Man i just hooked four of these up in my silverado..true 3200 watt rms amp at 1ohm..these things are unreal..was shaking pictures off the wall in the house from my driveway...definantly worth it

By james on April 2, 2025 Checkmark Icon Verified purchase




ZS46CX_ACC_KIT small

Hifonics ZS46CX with Installation Accessories

400W Peak (80W RMS) Zeus Series 4x6" Zeus Series 2-Way Coaxial Car Speakers + 4"x6" Speaker Baffles + Sound Damping, Roller and Panel Removal Kit

(245)

$57.36

List price $97.70

SBK925GB small

American International SBK925GB

Single DIN or Double DIN Stereo Dash Kit for select 2015-2017 Legacy and Outback with Classic Dash (Gloss Black)

$27.99

List price $74.00

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2001 Volvo V40

2004 BMW X5

2017 Chevrolet Bolt EV

2015 Toyota Prius

2010 Mazda Tribute

1981 Porsche 911

2008 Lincoln MKX

1998 Ford Explorer

2010 GMC Sierra Denali

2003 Chevrolet TrailBlazer

Vehicle
Store
Delete

2000 Harley Davidson FLHR Road King

2016 Harley Davidson FLD Switchback

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

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
  • 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.