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  3. Car Subwoofers
  4. Car Subwoofer Boxes
  5. Car Subwoofers with a Box (Loaded Sub Boxes)
  6. Ported Enclosure Boxes with Car Subwoofers
  7. NVX NE121P_SML12D2

See all parts that fit your 2009 M3

NVX NE121P w/ Sundown Audio SML 12" D2

Single 12" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 1.75 Cu. Ft. with Polyfil and NVX Logo w/ 500W RMS 12" SML Series Dual 2-ohm Shallow Car Subwoofer

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• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.75 cubic feet
• Premium Black Carpet with Black NVX Logo

Learn more about the ne121p_sml12d2
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List price $407.98
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-12%

$359.55

 with warranty
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Description

NVX brand icon

Authorized dealer

NVX NE121P

Single 12" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 1.75 Cu. Ft. with Polyfil and NVX Logo
Quantity: 1

Product Details:

  • Not compatible with NVX VC-Series Subwoofers
  • 12" 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: 13-7/8"
  • Subwoofer cutout diameter: 11-7/32"
  • Internal box volume: 1.75 cubic feet
  • Dimensions: 16.50" D x 20.00" W x 16.00" H
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty

Port Specifications:

  • Tuning Frequency: 38 Hz
  • Port Width: 1.5"
  • Port Height: 14.50"
  • Port Length: 17.52"

Sundown Audio SML-12 D2 12" (SML12D2)

1200W Peak (600W RMS) 12" SML Series Dual 2-ohm Shallow Car Subwoofer (SW-SML12D2)
Quantity: 1

Product Details:

  • 12" Dual 2 ohm SML Series Shallow Subwoofer
  • Power Handling:
    • Peak: 1200 watts
    • RMS: 600 watts
  • Pressed Paper Cone
  • Pressed Foam Surround
  • Custom tooled cone shape for reduced noise over high excursion
  • Stitched-on “Mini-XL” tinsel Leads to prevent fatigue and failure
  • Vented pole-piece and vented magnetic gap
  • Dual-magnet design for smooth acoustic response
  • 2.5" High Temperature Copper Voice coil on black aluminum former
  • High temperature 4-layer copper voice coil wire
  • 14 mm Xmax
  • Double Stacked magnet motor structure
  • Bolt-through motor design to ensure maximum longevity
  • Resonance Frequency (Fs): 34.932 Hz
  • Sensitivity: 87.5 dB
  • Recommended sealed box volume: 0.75 cubic feet - 1.0 cubic feet
  • Recommended ported box volume: 1.25 cubic feet - 1.75 cubic feet
  • Top-mount depth: 4.45"
  • Cutout diameter: 10.74"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

    • Priced Individually

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Specifications & Details

Subwoofer Specifications
Series
SML Series
Subwoofer Size
12"
RMS Power Handling
500 watts
Sensitivity
87.5 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:

NE121P_SML12D2

Weight:

60.00lbs

Internal SKU:

ne121p_sml12d2

Internal Product ID:

228910

Customer Ratings & Reviews

NVX NE121P w/ Sundown Audio SML 12
3
5 star
33%
4 star
33%
3 star
33%
2 star
0%
1 star
0%
Durability
3.5
Value
5
Features
5
Design
5
Usability
4

Customer Reviews

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Nice sounding box but abit tall.

The following review is for NE121P, which is a part of the bundle you are viewing.

Great sturdy box, carpeting was nicest done only thing i disliked about it was its hight it too tall my trunk is 14.75. But this thing is 16" tall had to cuz the foam that was under the mat to make it barely fit and also re.oved the back seat...it was worth it though, im running a rf-p3d2 12"

By robinson on February 27, 2026 Checkmark Icon Verified purchase
2023 Toyota GR86

Report abuse

The following review is for NE121P, which is a part of the bundle you are viewing.
By Austin on February 26, 2026 Checkmark Icon Verified purchase
2010 Honda Odyssey

Report abuse

10/10

The following review is for SW-SML12D2, which is a part of the bundle you are viewing.

Very powerful sub and sounds great for shallow model

By Owen on April 20, 2025 Checkmark Icon Verified purchase

Report abuse
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