Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In
  1. Home
  2. Closeout
  3. Car Audio & Electronics Closeout
  4. Car Subwoofers Closeout
  5. 18" Car Subwoofers Closeout
  6. Sundown Audio UV218D2_OBN

See all parts that fit your 1978 G Series

Sundown Audio UV.2 18" D2 (Open Box, Like New)

1750W RMS 18" U Series Dual 2-ohm Car Subwoofer

Sundown Audio
Shop all Sundown Audio
highlight-star-icon

• RMS Power: 1750 watts
• Impedance: Dual 2 ohm
• Mount depth: 10"
• Sensitivity: 89.4169 dB

Learn more about the uv218d2_obn

We apologize

This item has been discontinued

Show me more products from this category
Go to Category

Description

Sundown Audio brand icon

Authorized dealer

Item Condition - Like New (Open Box):

This product works and looks like new. It may have been opened for a visual demo or product video. In some cases there may be signs of an attempt at installation like opened packaging or mounting screw holes used, but there is no real sign of use or wear. Includes all original parts, packaging and accessories (or suitable replacement)

Sundown Audio U-18 v.2 D2 18" (U18V2D2)

4000W Peak (2000W RMS) 18" U Series Dual 2-ohm Car Subwoofer (SW-UV218D2)
Quantity: 1

Product Details:

  • 18" Dual 2 ohm U Series Subwoofer
  • Power Handling:
    • Peak: 4000 watts
    • RMS: 2000 watts
  • Pressed Paper Cone
  • Double-Stitched Surround
  • Optimized for small ported or bandpass enclosures
  • Heavy-duty cast basket for added durability
  • Spring-loaded terminals accept up to 8-gauge wire
  • Stitched-on heavy-duty tinsel leads for easy connection
  • Solid pole with vent channels and aluminum shorting ring cap
  • Rear gap-venting and top cooling channels
  • 3" High Temperature Copper Voice coil
  • Aluminum voice coil former for superior heat dissipation
  • 30 mm Xmax
  • Double Stacked Ferrite magnet motor structure
  • Resonance Frequency (Fs): 30.9541 Hz
  • Sensitivity: 89.41 dB
  • Recommended sealed box volume: 3.0 cubic feet
  • Recommended ported box volume: 4.0 cubic feet
  • Top-mount depth: 10"
  • Cutout diameter: 16.9"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

    • Priced Individually

Subwoofer Wiring Guide

Wiring Guide to Wire 1 Sundown Audio UV.2 18" D2 (Open Box, Like New) Subwoofer

Mono Amp

Mono Amp - Option 1

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Sundown Audio UV.2 18" D2 (Open Box, Like New) Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Sundown Audio UV.2 18" D2 (Open Box, Like New) Subwoofers

Mono Amp

Mono Amp - Option 1

4 Channel Amp

Wiring Guide to Wire 4 Sundown Audio UV.2 18" D2 (Open Box, Like New) Subwoofers

2 Channel Amp

4 Channel Amp

Specifications & Details

Subwoofer Specifications
Series
U Series
Subwoofer Size
18"
RMS Power Handling
1750 watts
Voice Coil(s)
Dual
Impedance (Per Voice Coil)
2 ohm
Voice Coil Material
Aluminum
Voice Coil Diameter
3"
Sensitivity
89.4169 dB
Xmax (millimeters)
30 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Magnet Structure
Double Stacked
Recommended Enclosure Specifications
Recommended Enclosure Type
Bandpass
Ported / Vented
Sealed
Optimum Sealed Box Volume
3.0 cubic feet
Optimum Ported Box Volume
4.0 cubic feet
Top-Mount Depth (Mounting Depth)
10"
Cutout Diameter
16.9"
Shallow Mount Installation
No
T/S Parameters (Electromechanical)
Free-Air Resonance (Fs)
30.9541 Hz
Equivalent Compliance (Vas)
111.7625 liters
Total Speaker Q Value (Qts)
0.5151
Electrical Q Value (Qes)
0.5669
Electrical Resistance of Voice Coil (Re)
3.8710 ohm
Mechanical Q Value (Qms)
5.6396
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details

Manufacturer:

Sundown Audio

Model Number:

UV218D2_OBN

Weight:

62.00lbs

Internal SKU:

uv218d2_obn

Internal Product ID:

224339

Customer Ratings & Reviews

Sundown Audio UV.2 18
5 star
0%
4 star
0%
3 star
0%
2 star
0%
1 star
0%
Durability
0
Value
0
Features
0
Design
0
Usability
0

Customer Reviews

Sort by:
Loading...
Sorry, no reviews found
BBSW127 main

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

(43)

$6.99

List price $14.99

Add to cart
SDTK20 main

NVX SDTK20

20 Square Feet of Sound Damping Material

(123)

$49.99

List price $71.99

Add to cart
RKXTK main

Stinger RKXTK

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

(9)

$155.99

List price $339.00

Add to cart
19405 main

Dynamat Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

(47)

$156.95

List price $187.44

Add to cart
SDRLR1 main

NVX SDRLR1 Sound Damping Rubber Roller

Universal Professional Heavy Duty Roller for Sound Damping

(126)

$10.99

List price $13.99

Add to cart
SDRLR2 main

NVX SDRLR2 Sound Damping Rubber Roller

Universal Professional Heavy Duty Roller for Sound Damping

(19)

$11.99

List price $14.99

Add to cart
BAMMD3 main

Belva BAMMD3

Nine Function Digital Multimeter

(7)

$9.99

List price $29.99

Add to cart
iK501 small

Kicker iKICK 09iK501/ iK501 Factory Refurbished

Home/Portable, Powered iPod Docking System w/ 6" Square Subwoofer, Remote Control and Aux Input

(25)

$59.99

List price $349.95

KDC-X492+KCA-BT100 small

Kenwood eXcelon KDC-X492 + Kenwood KCA-BT100

Combo: Bluetooth Kit Included with In-Dash CD, MP3, WMA Receiver with Remote, Aux and USB Inputs, and iPod Direct Connection via USB

$179.99

List price $389.99

Related Searches

› Sundown Audio › Sundown Audio 18" Car Subwoofers › 18" Car Subwoofers under $800
Save up to 10 different vehicles in your garage
Vehicle
Store Delete

1978 GMC G Series

2006 Subaru Impreza

2007 Volkswagen Beetle

2006 Volkswagen Phaeton

2011 Rolls Royce Ghost

2025 Ford Mustang Mach-E

2003 Subaru Baja

2011 Nissan Frontier

2017 Ford Flex

2013 Scion xB

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

Cancel

This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue

Cancel

Shop your 1978 G Series
Why Use a Vehicle Fit Guide?
Change vehicle | Shop without vehicle
Whoa! Slow down. Add your details below!
additional information required
Add vehicle details to confirm fitment
Ignore fitment details
Find stereos and more that work -- fast.
Remove

Can't find your vehicle? Click here and we'll help.

Where to find vehicle info

Go to Fitment

Didn't find your car?

Submit your details and we'll help!
Please enter the letters as they are shown in the image above. Letters are not case-sensitive.
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
Back

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.

Back
Track your order
Call our experts
Support Center
Return & Exchanges
Follow on Instagram Instagram logo
Subscribe on YouTube YouTube logo