18" Speaker Car Speaker & Subwoofer Enclosures

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Car Audio & Video Installation

52 Results

BIG BASS SUBS- Dual 18" Ported box- SPL SUBWOOFER-ALL 1" 32hz-4.5cu.ft per side
Brand New · Atrend
$525.00
or Best Offer
Free shipping
21 watching
Knock-Down MDF 4 ft³ Subwoofer Cabinet for Dayton Audio 18" Ultimax
Brand New
$249.98
or Best Offer
Free shipping
29 watching
18 Inch Skar Box
Pre-Owned
$100.00
or Best Offer
Local Pickup
Custom Ported Sub Enclosure Box for 1 18" Subwoofer Plexiglass Window - BIRCH
Brand New · Concept
(2)
$439.95
$39.95 shipping
199 watching
Harmony Audio HA-BV1X18E Universal Single 18" Vented Sub Box Unloaded Enclosure
Brand New
$209.95
Free shipping
34 sold
Custom Ported Sub Enclosure Box for 1 18" Sundown Audio U Series U-18 Subwoofer
Brand New · Concept
(2)
$319.95
$39.95 shipping
113 sold
Custom Unloaded Single 18" Vented Subwoofer Enclosure Sub Box 1" MDF Heavy Duty
Brand New
$229.95
Free shipping
53 sold
Zv5 18 Sundown
Pre-Owned
$550.00
or Best Offer
$89.19 shipping
20 watching
Custom Ported Sub Enclosure Box for 1 18" Subwoofer - 33Hz - 5.5CF ~BIRCH~
Brand New · Concept
(1)
$384.95
$39.95 shipping
139 watching
SUBWOOFER BOX NISSAN 281703WS0A
Pre-Owned
$85.00
$50.03 shipping
Atrend WDX18SV Single 18" Vented Enclosure Box for WDX Subwoofers
Brand New · Atrend
$269.99
Free shipping
Only 2 left
Custom Ported Sub Enclosure Box for 1 18" SoundQubed HDX Subwoofer ~Plexi Window
Brand New · Concept
$399.95
$39.95 shipping
Custom Ported Sub Enclosure Box for 1 15" Massive Audio BOA 151 Subwoofer ~BIRCH
Brand New · Concept
$449.95
$39.95 shipping
Custom Ported Sub Enclosure Box for 1 18" CT Sounds TROPO 18 Subwoofer - BIRCH
Brand New · Concept
$459.95
$39.95 shipping
Ported Custom Sub Enclosure Box for 1 18" Skar Audio EVL EVL-18 Subwoofer - 31Hz
Brand New · Concept
$389.95
$39.95 shipping
112 watching
Powered 1,000 Watt Dayton Audio Reference 18" With Dual Passive Radiator Subwoof
Brand New
$1,299.98
or Best Offer
Free shipping
Gately Audio - 2 X 18" SUBWOOFER ENCLOSURE SUBS UP PORT BACK 12.5 CF
Brand New
$2,409.00
Free shipping
55 watching
Ported Custom Sub Enclosure Box for 1 18" Skar Audio ZVX-18 Subwoofer - 5.25 CF
Brand New · Concept
$389.95
$40.00 shipping
53 sold
Custom Ported Sub Enclosure Box for 1 Sundown Audio X-18 18" Subwoofer - BIRCH
Brand New · Concept
(2)
$639.95
$200.00 shipping
Sundown Audio Single 18" Zv6 Ported Enclosure
Brand New
$1,199.99
Free shipping
Custom Dual 18" Vented Subwoofer Enclosure Sub Box - Heavy Duty
Brand New
$1,850.00
$250.62 shipping
22 watching
HA-BV1X18E Universal Single 18" Empty Vented Port Sub Box Unloaded Enclosure
Brand New
$300.81
Free shipping
Sundown Audio Single 18" SAv2 Ported Enclosure
Brand New
$999.99
Free shipping
Resilient Sounds 18" Platinum Subwoofer Enclosure - Birch Ply - 6.0 Cu @ 31Hz
Brand New
$999.99
or Best Offer
Free shipping
19 watching
Sundown Audio Single 18" Zv5 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz
Brand New
$1,199.99
or Best Offer
Free shipping
Sundown Audio Single 18" SAv2 Ported Enclosure - Birch Ply - 5.5 Cu @ 30Hz
Brand New
$999.99
or Best Offer
Free shipping
Open Baffle Enclosure Cabinet for 18" Woofer or Subwoofer Local Pickup 53818
Pre-Owned
$1.00
or Best Offer
Local Pickup
Ported custom box for 18" Subwoofers for 03 & up Tahoe *Subwoofer not included*
New (Other)
$435.00
Local Pickup
Custom Ported Sub Enclosure Box for 1 18" Deaf Bonce Apocalypse Subwoofer ~30Hz
Brand New · Concept
$459.95
$39.95 shipping
Custom Ported Sub Enclosure Box for 1 18" Sundown Audio SA Series SA-18 - BIRCH
Brand New · Concept
$459.95
$39.95 shipping
Custom Ported Sub Enclosure Box for 1 18" Skar Audio ZVX-18 Plexiglass WIndow
Brand New · Concept
$459.95
$39.95 shipping
93 watching
Custom PORTED Sub Enclosure Box for 1 18" CT Sounds Tropo-18 Subwoofer - BIRCH
Brand New · Concept
$394.95
$39.95 shipping
Custom Ported Sub Enclosure Box for 1 18" Sundown Audio U Series U-18 PLEXIGLASS
Brand New · Concept
(2)
$369.95
$39.95 shipping
149 watching
Custom Ported Sub Enclosure Box for 1 18" SoundQubed HDX Subwoofer - BIRCH
Brand New · Concept
(2)
$349.95
$39.95 shipping
Custom Ported Sub Enclosure Box for a Resilient Sounds TEAM 15 Subwoofer ~BIRCH~
Brand New · Concept
(2)
$459.95
$39.95 shipping
Sundown Audio Single 18" NSv4 Ported Enclosure
Brand New
$1,199.99
Free shipping
Sundown Audio Single 18" Xv2 Ported Enclosure
Brand New
$1,199.99
Free shipping
Sundown Audio Single 18" NSv6 Ported Enclosure
Brand New
$1,199.99
Free shipping
Custom Ported Sub Enclosure Box for 1 18" Skar Audio EVL-18 Subwoofer Plexiglass
Brand New · Concept
(2)
$459.95
$39.95 shipping
143 watching
Ported Custom Sub Enclosure Box for 1 18" DC Audio Level 3 / 4 / 5 / 6 Subwoofer
Brand New · Concept
$394.95
$39.95 shipping
Sundown Audio Single 18" Zv5 Ported Enclosure
Brand New
$1,199.99
Free shipping
Sundown Audio Single 18" NSv5 Ported Enclosure
Brand New
$1,199.99
Free shipping
Sundown Audio Single 18" Xv3 Ported Enclosure
Brand New
$1,199.99
Free shipping
Sundown Audio Single 18" Zv4 Ported Enclosure
Brand New
$1,199.99
Free shipping
Sundown Audio Single 18" NSv6 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz
Brand New
$1,199.99
or Best Offer
Free shipping
Sundown Audio Single 18" Xv2 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz
Brand New
$1,199.99
or Best Offer
Free shipping
Sundown Audio Single 18" Zv6 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz
Brand New
$1,199.99
or Best Offer
Free shipping
11 watching
Sundown Audio Single 18" NSv4 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz
Brand New
$1,199.99
or Best Offer
Free shipping
Sundown Audio Single 18" Xv3 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz
Brand New
$1,199.99
or Best Offer
Free shipping
Sundown Audio Single 18" Zv4 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz
Brand New
$1,199.99
or Best Offer
Free shipping
Sundown Audio Single 18" NSv5 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz
Brand New
$1,199.99
or Best Offer
Free shipping
Custom Ported Sub Enclosure Box for 1 Sundown Audio ZV6 Z V.6 ZV.6 18" Subwoofer
Brand New · Concept
(2)
$639.95
$200.00 shipping

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18" Speaker Car Speaker & Subwoofer Enclosures

Shop by Category

52 Results

BIG BASS SUBS- Dual 18" Ported box- SPL SUBWOOFER-ALL 1" 32hz-4.5cu.ft per side

Knock-Down MDF 4 ft³ Subwoofer Cabinet for Dayton Audio 18" Ultimax

18 Inch Skar Box

Custom Ported Sub Enclosure Box for 1 18" Subwoofer Plexiglass Window - BIRCH

Harmony Audio HA-BV1X18E Universal Single 18" Vented Sub Box Unloaded Enclosure

Custom Ported Sub Enclosure Box for 1 18" Sundown Audio U Series U-18 Subwoofer

Custom Unloaded Single 18" Vented Subwoofer Enclosure Sub Box 1" MDF Heavy Duty

Zv5 18 Sundown

Custom Ported Sub Enclosure Box for 1 18" Subwoofer - 33Hz - 5.5CF ~BIRCH~

SUBWOOFER BOX NISSAN 281703WS0A

Atrend WDX18SV Single 18" Vented Enclosure Box for WDX Subwoofers

Custom Ported Sub Enclosure Box for 1 18" SoundQubed HDX Subwoofer ~Plexi Window

Custom Ported Sub Enclosure Box for 1 15" Massive Audio BOA 151 Subwoofer ~BIRCH

Custom Ported Sub Enclosure Box for 1 18" CT Sounds TROPO 18 Subwoofer - BIRCH

Ported Custom Sub Enclosure Box for 1 18" Skar Audio EVL EVL-18 Subwoofer - 31Hz

Powered 1,000 Watt Dayton Audio Reference 18" With Dual Passive Radiator Subwoof

Gately Audio - 2 X 18" SUBWOOFER ENCLOSURE SUBS UP PORT BACK 12.5 CF

Ported Custom Sub Enclosure Box for 1 18" Skar Audio ZVX-18 Subwoofer - 5.25 CF

Custom Ported Sub Enclosure Box for 1 Sundown Audio X-18 18" Subwoofer - BIRCH

Sundown Audio Single 18" Zv6 Ported Enclosure

Custom Dual 18" Vented Subwoofer Enclosure Sub Box - Heavy Duty

HA-BV1X18E Universal Single 18" Empty Vented Port Sub Box Unloaded Enclosure

Sundown Audio Single 18" SAv2 Ported Enclosure

Resilient Sounds 18" Platinum Subwoofer Enclosure - Birch Ply - 6.0 Cu @ 31Hz

Sundown Audio Single 18" Zv5 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz

Sundown Audio Single 18" SAv2 Ported Enclosure - Birch Ply - 5.5 Cu @ 30Hz

Open Baffle Enclosure Cabinet for 18" Woofer or Subwoofer Local Pickup 53818

Ported custom box for 18" Subwoofers for 03 & up Tahoe *Subwoofer not included*

Custom Ported Sub Enclosure Box for 1 18" Deaf Bonce Apocalypse Subwoofer ~30Hz

Custom Ported Sub Enclosure Box for 1 18" Sundown Audio SA Series SA-18 - BIRCH

Custom Ported Sub Enclosure Box for 1 18" Skar Audio ZVX-18 Plexiglass WIndow

Custom PORTED Sub Enclosure Box for 1 18" CT Sounds Tropo-18 Subwoofer - BIRCH

Custom Ported Sub Enclosure Box for 1 18" Sundown Audio U Series U-18 PLEXIGLASS

Custom Ported Sub Enclosure Box for 1 18" SoundQubed HDX Subwoofer - BIRCH

Custom Ported Sub Enclosure Box for a Resilient Sounds TEAM 15 Subwoofer ~BIRCH~

Sundown Audio Single 18" NSv4 Ported Enclosure

Sundown Audio Single 18" Xv2 Ported Enclosure

Sundown Audio Single 18" NSv6 Ported Enclosure

Custom Ported Sub Enclosure Box for 1 18" Skar Audio EVL-18 Subwoofer Plexiglass

Ported Custom Sub Enclosure Box for 1 18" DC Audio Level 3 / 4 / 5 / 6 Subwoofer

Sundown Audio Single 18" Zv5 Ported Enclosure

Sundown Audio Single 18" NSv5 Ported Enclosure

Sundown Audio Single 18" Xv3 Ported Enclosure

Sundown Audio Single 18" Zv4 Ported Enclosure

Sundown Audio Single 18" NSv6 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz

Sundown Audio Single 18" Xv2 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz

Sundown Audio Single 18" Zv6 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz

Sundown Audio Single 18" NSv4 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz

Sundown Audio Single 18" Xv3 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz

Sundown Audio Single 18" Zv4 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz

Sundown Audio Single 18" NSv5 Ported Enclosure - Birch Ply - 7.0 Cu @ 30Hz

Custom Ported Sub Enclosure Box for 1 Sundown Audio ZV6 Z V.6 ZV.6 18" Subwoofer

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Ported custom box for 18" Subwoofers for 03 & up Tahoe Subwoofer not included