Sundown Audio U-Series subwoofers on a wet garage floor under green light. Turn it up, build it right. Shop subwoofers at Car Audio Bargain.
THE GEAR FOR YOUR NEXT BUILD

TURN IT UP.
BUILD IT RIGHT.

Serious subwoofers.
Trusted brands.
Your next upgrade.

Shop Subwoofers Refurbished Sundown Audio subwoofers in a dark workshop. More bass, less spend. Shop refurbished gear.
REFURBISHED GEAR

MORE BASS.
LESS SPEND.

Shop Refurbs Audio Apex CAB-22 amplifier on a workbench with green shop lighting. Big power, right here. Shop amplifiers.
AMPLIFIERS

BIG POWER.
RIGHT HERE.

Shop Amps XS Power D3400 battery on a steel bench in front of an open engine bay. Feed your system. Shop batteries and power.
POWER UPGRADES

FEED YOUR
SYSTEM.

Shop Power Spool of Full Tilt Audio blue 18 gauge tinned OFC speaker cable in a car trunk install. Finish the build. Shop wire and install.
WIRE & INSTALL

FINISH THE
BUILD.

Shop Install

Shop by Brand

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Sundown Audio

Sundown Audio

338 products

Subwoofers, amplifiers, pro audio speakers and recone kits

Shop Sundown Audio
Crossfire Car Audio

Crossfire Car Audio

51 products

C3, C5 and C7 subwoofers, CFM and BMF amplifiers

Shop Crossfire Car Audio
Audio Apex

Audio Apex

12 products

CAB-22, CAB-45v2 and CAB-M165 amplifiers and enclosures

Shop Audio Apex
XS Power

XS Power

164 products

AGM and lithium batteries, SuperBank capacitors, chargers

Shop XS Power
Mechman Alternators

Mechman Alternators

489 products

High output alternators and dual alternator bracket kits

Shop Mechman Alternators
Full Tilt Audio

Full Tilt Audio

116 products

OFC power wire, amp kits, RCA cables and terminals

Shop Full Tilt Audio
Sparked Innovations

Sparked Innovations

122 products

Voltmeters, switch panels, cooling fans and sensors

Shop Sparked Innovations
Galeforce

Galeforce

14 products

G3, F1 and F-3 pro audio midrange speakers

Shop Galeforce
Refurbished Sundown Audio

Refurbished Sundown Audio

Inspected, tested and restored to full working condition, and covered by a 90-day warranty from the date of delivery.

Limited quantities. Refurbished items are not eligible for financing or leasing.
14 refurbished items in stock now
RefurbishedRefurbished Nightshade NS-Series NS5 10" 3000W Subwoofer NS v.5

Nightshade NS-Series NS5 10" 3000W Subwoofer NS v.5

$967.99$1,209.99
Save $242 (20% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SFB2004 Amplifier

Sundown Audio SFB2004 Amplifier

$189.49$259.99
Save $70.50 (27% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SAEV42000 Amplifier

Sundown Audio SAEV42000 Amplifier

$334.33$479.99
Save $145.66 (30% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SAEV42004 Amplifier

Sundown Audio SAEV42004 Amplifier

$360.99$539.99
Save $179 (33% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SAEV43000 Amplifier

Sundown Audio SAEV43000 Amplifier

$480.99$699.99
Save $219 (31% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SALT2004 Amplifier

Sundown Audio SALT2004 Amplifier

$547.99$799.99
Save $252 (32% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SALT4 Amplifier

Sundown Audio SALT4 Amplifier

$1,021.01$1,499.99
Save $478.98 (32% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SALT5004 Amplifier

Sundown Audio SALT5004 Amplifier

$687.74$999.99
Save $312.25 (31% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SALT6 Amplifier

Sundown Audio SALT6 Amplifier

$1,394.46$1,899.99
Save $505.53 (27% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SALT8 Amplifier

Sundown Audio SALT8 Amplifier

$1,734.33$2,199.99
Save $465.66 (21% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SFB600D Amplifier

Sundown Audio SFB600D Amplifier

$114.74$174.99
Save $60.25 (34% off new)
90-Day WarrantyNot eligible for financing
RefurbishedRefurbished Sundown Audio SFB5004 Amplifier

Sundown Audio SFB5004 Amplifier

$260.99$399.99
Save $139 (35% off new)
90-Day WarrantyNot eligible for financing

New Arrivals

Fresh stock from the brands we carry

View all new products
NewSale400 Amp Black high output alternator 1996-2004 GM Truck 4.3L 4.8L 5.3L 5.7L 6.0L
Mechman

400 Amp Black high output alternator 1996-2004 GM Truck 4.3L 4.8L 5.3L 5.7L 6.0L

$549.00$599.00
NewSale400 Amp Green high output alternator 1996-2004 GM Truck 4.3L 4.8L 5.3L 5.7L 6.0L
Mechman

400 Amp Green high output alternator 1996-2004 GM Truck 4.3L 4.8L 5.3L 5.7L 6.0L

$549.00$599.00
NewSaleE Series 400 Amp Red Billet GM Truck
Mechman

E Series 400 Amp Red Billet GM Truck

$699.00$799.00
NewSaleE Series 400 Amp Pink Billet GM Truck **Limited Edition**
Mechman

E Series 400 Amp Pink Billet GM Truck **Limited Edition**

$699.00$799.00
NewSaleE Series 400 Amp Green Billet GM Truck | Condition: New | Category: 1999 - 2000
Mechman

E Series 400 Amp Green Billet GM Truck

$699.00$799.00
NewAudio Apex Single 12 Box
Audio Apex

Audio Apex Single 12 Box

$374.99
Financing & leasing

Build it now.
Pay over time.

Shop Pay Installments, Snap Finance and Sezzle at checkout: three ways to spread the cost, so the system you actually want doesn't have to wait for the budget to catch up.

  • Shop Pay Installments, powered by Affirm: 4 interest-free payments or monthly plans
  • Snap Finance lease-to-own when you need more time to pay
  • Sezzle: pay in 4 or 5 on smaller orders
See financing optionsShop all
XS Power Titan8 lithium battery

Guides & How-Tos

Pick the right gear and get the most out of it

All guides
The Most Common Subwoofer Problems and How to Fix Them
Guide

The Most Common Subwoofer Problems and How to Fix Them

s an audio enthusiast, investing in a high-quality subwoofer is crucial to your overall car audio system. Subwoofers are designed to enhance low-frequency sounds and add depth and...

Read the guide
The Best-Selling Car Audio Products at Audio APEX: A Buyer's Guide
Guide

The Best-Selling Car Audio Products at Audio APEX: A Buyer's Guide

At Audio APEX, we understand that upgrading your vehicle's audio system can be overwhelming, but it's worth it to experience high-quality sound while on the road. That's why...

Read the guide
4 Signs Your Car Subwoofer Needs an Upgrade
Guide

4 Signs Your Car Subwoofer Needs an Upgrade

Car Audio Bargain knows the subwoofer is a crucial component of your car's audio system. It's responsible for producing low-frequency sounds, providing depth and richness to your music....

Read the guide