Sundown Audio Promo Codes and Coupons September 2025

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Sundown Audio

Sundown Audio is a manufacturer and retailer of high-performance car audio equipment, specializing in subwoofers, amplifiers, and speakers. Founded in 2003, they've built a reputation for producing quality audio components that deliver exceptional sound at competitive prices. Their products are popular among car audio enthusiasts and competitors.

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Today's Sundown Audio discount codes

TOP PICK
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10% off

87 uses
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worked 18 days ago

10% Off Storewide at Sundown Audio
Sundown Audio logo

10% off

6 uses
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worked 18 days ago

10% Off Select Items at Sundown Audio
Sundown Audio logo

5% off

7 uses
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worked 18 days ago

5% Off Clearance Items at Sundown Audio
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Free Shipping

20 uses
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worked 18 days ago

Free Shipping Storewide at Sundown Audio

Featured Sundown Audio Products

Z-Series ZV6 18" 2500W Subwoofer Z v.6 *USED*

Z-Series ZV6 18" 2500W Subwoofer Z v.6 *USED*

This is a refurbished product that has been professionally rebuilt here at Sundown Audio. It comes with a non-doa warranty only. That means they are guaranteed to work when you receive it but no further warranty afterwards. Let us know within 24 hours of delivery if this product has an issue. We will not warranty any refurbished subwoofer after that time. These potentially have scratches & scuffs on the magnets/motors and will not be in new condition.   The Z v.6 is the second step up in Sundown's "ultra-high excursion" subwoofer lineup after the X v.3 series and replaces the world-famous Z v.5 series. All models (10,12,15,18) feature our custom tooled and patented frames (US Patent Numbers D691596, D691597, D691598, and D741841). Sundown mates these new platform frames to a quad stacked 240mm (9.45”) diameter motor structure with a total magnet stack height of 100mm (3.94”) featuring a hyper-extended pole and extreme clearances (allowing over 4" p-p travel before mechanical bottom effectively making it bottomless). Compared to the X v.3 motor both the top & back plates are thicker allowing for even more magnetic strength and excursion potential. For the Z v.6 the top plate is another 5mm thicker than even the outgoing Z v.5 series! This motor drives a 3" diameter 8-Layer Flat Wire Aluminum Voice Coil wound on a thick aluminum former to incredible levels of excursion. The Z v.6 now uses the same voice coil as the NS v.5 series. The Z v.5 utilized a 4-layer voice coil – the change to an 8-layer was to answer our customers desire for higher motor force (more output) and it does just that! Based on Sundown's years of experience with the Z v.4 and Z v.5 series we've also improved the voice coil ventilation to be even more effective. The Z v.6 features a high-velocity pole vent, a heavily vented magnetic gap, and (all new for the v.6) machined channels in four places around the pole piece itself. The Z v.6 series was designed from the ground-up to become the new standard in the low-frequency / small ported box subwoofer category in this price range. They will work in the same small enclosures that are commonly used for for Sundown Audio's subwoofers, although, they can be used with enclosures up to about 50% larger than those if you desire even more low-end extension. The Z v.6 series is really a different kind of woofer due to its incredibly linear suspension. They are designed for the LOWEST level of bass extension possible in a small enclosure while maintaining extremely low levels of distortion. Features Power Handling: 2500 Watts RMS Xmax = 35mm one-way by 70% BL Heavily vented magnetic gap Spring Loaded Terminals Optimized high-velocity pole vent Innovative high-velocity cast-aluminum vented frame spacer ring Black aluminum 3 inch 8-layer voice coil Mega-Roll v.2 surround Custom tooled basket Large aluminum Faraday (shorting) Ring Stitched-On XL Tinsel Leads to prevent fatigue and failure Custom-tooled ultra-linear spider packs Specifications T/S SPECS Z V.6 18″D1 Z V.6 18″ D2 RE (Ohms) 1.7977 4.0 FS (Hz) 26.6353 24.1230 VAS (L) 97.0485 116.3911 Qes 0.4869 0.4265 Qms 5.7399 5.7355 Qts 0.4489 0.3970 Le (mH) 2.1512mH 4.3519mH BL (NA) 20.4872 31.2785 Mms (Grams) 679.3307g 690.5587g Cms (uM/N) 52.5587uM/N 63.0341uM/N Sens (dB @ 1w/1m) 87.5064dB 87.5806dB Xmax 35mm 35mm Enclosure Specifications Sealed Enclosure Not Recommended Ported Enclosure 7 cu.ft. net Recommended Tuning 32Hz Recommended Port Area 100 sq.in. Displacement .27 cu. ft.  Depth 14.92" Outside Diameter 18.46" Cut-Out 16.68" Physical Dimensions Download Enclosure Designs .Zip File

USD 652.99

SA-Classic 12" Subwoofer *USED*

SA-Classic 12" Subwoofer *USED*

This is a used product that has been professionally rebuilt here at Sundown Audio. It comes with a non-doa warranty only. That means they are guaranteed to work when you receive it but no further warranty afterwards. Let us know within 24 hours of delivery if this product has an issue. We will not warranty any used subwoofer after that time. These potentially have scratches & scuffs on the magnets/motors and will not be in new condition. RMS 750 watts Dual 2 or 4 ohm voice coils Optimized for small ported, sealed, & band-pass enclosures Large aluminum Faraday ring for smooth acoustic response High strength cast aluminum frame Low distortion motor construction High-temperature voice coil wire Spring-loaded terminals Stitched-on “XL” tinsel lead wires The SA Classic sub is a stunning combination of value, power handling, and deep excursion. It features a cast aluminum frame that houses a bulletproof custom 2.5-inch voice coil, robust double-layered Nomex spider, and SPL competition-grade paper cone. These components are built into a flexible design that works well in any type of enclosure. Specifications T/S SPECS SA CLASSIC 12" D2 SA CLASSIC 12" D4 RE (Ohms) 4.57 7.07 FS (Hz) 33.71 33.96 VAS (L) 21.21 24.63 Qes 0.58 0.55 Qms 5.34 5.15 Qts 0.52 0.49 Le (mH) 3.40 4.84 BL (NA) 21.64 25.67 Mms (Grams) 280 237 Cms (uM/N) 79.43 92.27 Sens (dB @ 1w/1m) 83.21 84.22 Xmax 19mm 19mm Enclosure Specifications SA CLASSIC 12" Sealed Enclosure 1.0 cu ft Ported Enclosure 1.75 cu ft Recommended Tuning 35Hz Recommended Port Area 26 sq in Displacement 0.14 cu ft Depth 6.5″ Outside Diameter 12.625″ Cut-Out 11.125″ Physical Dimensions Download Enclosure Designs .Zip File

USD 189.99

X-Series v.3 18" Subwoofer *USED*

X-Series v.3 18" Subwoofer *USED*

This is a used product that has been professionally rebuilt here at Sundown Audio. It comes with a non-doa warranty only. That means they are guaranteed to work when you receive it but no further warranty afterwards. Let us know within 24 hours of delivery if this product has an issue. We will not warranty any used subwoofer after that time. These potentially have scratches & scuffs on the magnets/motors and will not be in new condition. RMS 2000 watts Dual 1 or 2 ohm voice coil Made for extremely deep bass Triple-stacked magnet 3” voice coil Hyper-extended pole Built to order Designed with an extended pole piece and an incredible four inches of peak-to-peak excursion, the X v.3 is engineered for ultra-deep bass and high power handling. Engineered to set a new standard in the low-frequency/small-ported-box subwoofer category, the X Series can also work in up to a 50% larger enclosure if you desire even more low-end extension. The X v.3 series differentiates itself with its incredibly linear suspension, ensuring the lowest level of bass extension in a small enclosure while maintaining extremely low levels of distortion. Notably, the v.3 series features a much larger motor structure (220mm vs. 190mm on the v.1 series), improved motor ventilation, and an all-new Mega-Roll v.2 surround, providing a more linear and rugged update to the world-famous Mega-Roll v.1 surround design. Specifications RE (Ohms) 1.4 3.2 FS (Hz) 26.650 28.207 VAS (L) 130.302 109.935 Qes 0.526 0.657 Qms 2.793 3.091 Qts 0.442 0.542 Le (mH)     BL (NA) 14.543 20.854 Mms (Grams) 474.114 504.115 Cms (uM/N) 75.224 63.154 Sens (dB @ 1w/1m) 88.6dB 87.6dB Xmax 30mm 30mm T/S SPECS X V.3 18″ D1 X V.3 18″ D2 Enclosure Specifications X v.3 18 Sealed Enclosure N/A Ported Enclosure 7.00 cu ft Recommended Tuning 32hz Recommended Port Area 112 sq in Displacement 0.23 cu ft Depth 13.6" Outside Diam. 18.42" Cutout 16.69" Physical Dimensions Download Enclosure Designs .Zip File

USD 504.99

SD-4 10" 600w Shallow Mount Neo Subwoofer SD4 *Refurbished*

SD-4 10" 600w Shallow Mount Neo Subwoofer SD4 *Refurbished*

This is a refurbished product that has been professionally rebuilt here at Sundown Audio. It comes with a non-doa warranty only. That means they are guaranteed to work when you receive it but no further warranty afterwards. Let us know within 24 hours of delivery if this product has an issue. We will not warranty any refurbished subwoofer after that time. These potentially have scratches & scuffs on the magnets/motors and will not be in new condition.

USD 174.99

What Sundown Audio coupons are available today?

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More Sundown Audio Products

SLD-Series Drop In Kit

SLD-Series Drop In Kit

These are standard drop-in recone kits ONLY. If you need a custom recone kit, you will still need to call us to place your order. There are no refunds or exchanges with drop-in re-cone kits.  Please make sure you are ordering the correct model, version and impedance prior to ordering.

USD 129.99

SDDN-Series Drop In Kit

SDDN-Series Drop In Kit

These are standard drop-in recone kits ONLY. If you need a custom recone kit, you will still need to call us to place your order. There are no refunds or exchanges with drop-in re-cone kits.  Please make sure you are ordering the correct model, version and impedance prior to ordering.

USD 270.00

Surprise Me! $199

Surprise Me! $199

All Surprise Me Sales Are Final!

USD 199.00

Sundown Power Sports SPS-950 35aH AGM Battery

Sundown Power Sports SPS-950 35aH AGM Battery

950 max amps 12-volt AGM Shock resistant Waterproof All-season Zero maintenance M6 terminal hardware included You’ve got the loudest stereo on the trail, enough lighting to give all your friends a tan at once, and a winch so powerful it can pull a small tank out of a tar pit. One thing’s for sure: your factory battery was never designed to withstand that kind of stress. We have your answer. The SPS-950 is an immensely powerful AGM battery. Under eight inches square, this shock-resistant all-season battery is built to dole out up to 950 amps of current. Terminal hardware included. Specifications Max Amps 950A Ah: 35 RC: 50 Weight: 24.5 lbs. Length: 7.68" Height: 6.61" Width: 5.12"

USD 119.99

Sustainability Score

42%
Sundown Audio shows limited transparency regarding their environmental and social practices. While they maintain quality manufacturing standards, there's minimal public information about their sustainability initiatives, supply chain ethics, or environmental impact reduction efforts. Their packaging and shipping practices could be more eco-friendly, and they lack clear commitments to renewable energy or waste reduction programs. The company would benefit from increased transparency and formal sustainability policies.

About Sundown Audio

4.0 (1)

FAQs

Sundown Audio usually offers major sales during Black Friday, Cyber Monday, and occasionally during summer months. They also sometimes have flash sales announced through their social media channels.

Yes, Sundown Audio offers military discounts to active duty personnel and veterans with valid identification. Contact their customer service for current discount rates.

The best time to purchase is during Black Friday/Cyber Monday sales in November, as these typically offer the deepest discounts. End-of-model-year sales in late summer can also provide good value.

Sundown Audio generally doesn't offer price matching, as they sell directly to consumers at manufacturer-set prices. However, authorized dealers may have their own price matching policies.

In the past month, Sundown Audio has launched 4 new promo coupons for shopper discounts. This indicates that Sundown Audio provides regular opportunities for customers to save money on their purchases.

On average, Sundown Audio provides 2 discount coupons each month. Based on historical data, the average time between Sundown Audio coupon releases every 15 days. However, this rate depends on various factors such as seasonal promotions (Black Friday, Cyber Monday, etc.), product launches, or other marketing initiatives. To stay informed about upcoming discounts and promotions, we recommend checking Sundown Audio website regularly, subscribing to email newsletters, and following them on social media.

Sundown Audio is offering 4 working store-wide codes, however they are also offering additional discount codes with a best discount of 10% off

terra.coupons is the #1 provider of discount codes for your favorite retailers, such as Sundown Audio. As a crowd-sourced platform for coupon codes, we accurate codes for over 10,000 stores. Save time and avoid expired codes by checking terra.coupons for the latest Sundown Audio discount codes.

Curated by

Linda S.

Linda S.

Content Writer

Last updated September 2025

This page was curated by Linda, a savings and discount enthusiast from sunny Sarasota, Florida. With a keen eye for unbeatable deals, Linda ensures that all codes are checked and curated daily. She's also a certified yoga instructor who loves to share wellness tips. Check back tomorrow for more savings and perhaps a little zen!

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