Shop

Deals
Deal checker
Black Friday
Buying guides
Brands
Stores

Travel

Flight deals
Hotel deals

Company

Research
Press
deal.ai apps

Black Friday 2026

Walmart
Best Buy
Target
TVs
Laptops
Headphones
Apple
Gaming
Vacuums
Kitchen
Toys
Smartwatches
Tablets
Furniture
Mattresses

© Deal.ai Inc.

Deal.ai › DS18 › Boat & Car Amplifiers

DS18

DS18 SXE4000.4D Car Audio Amplifier Amp

DS18 SXE4000.4D Car Audio Amplifier Amp

Best price now

$324.95at Best BuyChecked Nov 8

Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Ask our agent about this product

Enter to send, Shift+Enter for a new line

Price facts

Last seen at $324.95 at Best Buy on Nov 8.
Checked at 2 stores.

Our take on the DS18 SXE4000.4D Car Audio Amplifier Amp

The DS18 SXE4000.4D is a four-channel class S car amplifier rated at 4,000 watts max, bridgeable to two channels for subwoofers. It uses MOS-FET output stages and a compact black chassis aimed at loud daily builds and SPL demos. Against premium four-channels it trades refinement and clean-power headroom for raw output per dollar, and it is not rated for marine use. Owners like the output for the size but report heat and electrical demands that call for upgraded wiring and charging.

Best forLoud daily bass and door-speaker buildsBudget SPL and demo vehiclesDrivers bridging channels for one or two subwoofersDIY installers with upgraded alternator and wiring

Pros

Four channels bridgeable to two for subwoofer power
High max power rating for its footprint
MOS-FET output stage
Class S design runs cooler than pure class A/B at high output
Simple controls and connections for DIY installs

Cons

4,000 watts is a max rating, not RMS per channel
Needs stout wiring, a big alternator and good grounds
Runs hot under sustained high output
Not rated for boats or wet environments
No DSP or advanced tuning features

DS18 SXE4000.4D Car Audio Amplifier Amp prices at every store

Best BuyNew
In stock
$324.95Free shippingChecked Nov 8
Visit Best Buy
WalmartNew
In stock
$324.95Free shippingChecked Nov 8
Visit Walmart

Store links may earn us a commission. Some prices via Klarna.

DS18 SXE4000.4D Car Audio Amplifier Amp price history

Lowest price we've seen: $324.95 on Nov 9 at Walmart. Tracked across 2 stores since Nov 9.

What reviewers say

Owner feedback centers on strong output for the size and money, with recurring complaints about heat and electrical demands.

What people mention

Power outputMixedOwners find it loud for the size but say the 4,000-watt figure is a peak number, not clean RMS power.
HeatCriticisedSeveral report the amp gets hot and can protect during long high-volume sessions.
Electrical demandCriticisedIt draws heavily and needs a strong alternator, big wiring and solid grounds to perform.
ValuePraisedBuyers say it delivers a lot of output for what it is compared with premium brands.
InstallationPraisedWiring and control layout are described as straightforward for DIY installs.
BuildMixedThe chassis feels solid enough, but owners question long-term durability at full output.

Specifications

Bridgeable: YesSource
Type: MultichannelSource
Color: BlackSource
Suitable for Boats: NoSource

Questions and answers

Is the 4,000-watt rating RMS?: No. DS18 rates this amp at 4,000 watts max; RMS power per channel is much lower. Plan your speakers and subs around the RMS figures.
Can it run two subwoofers?: Yes. Bridge the four channels into two and each bridged pair can drive one subwoofer, provided the combined impedance stays within the amp's bridged rating.
Do I need to upgrade my car's electrical system?: For high output, yes. A larger alternator, thick power and ground cable, and possibly a second battery are commonly needed to avoid voltage sag and protection trips.
Can I use it in a boat?: No. DS18 does not rate this amplifier for marine use, so it is a poor fit for boats or damp locations.
Does it have a built-in DSP?: No. It has standard gain and crossover controls only, so tuning is limited compared with DSP-equipped amplifiers.
What comes in the box?: Expect the amplifier, mounting hardware and a basic manual. Power and speaker wiring are not included and must be bought separately.
Where is the DS18 SXE4000.4D Car Audio Amplifier Amp cheapest?: At Best Buy, for $324.95, as of our latest check.
Where can I buy the DS18 SXE4000.4D Car Audio Amplifier Amp?: 2 stores we checked sell it, including Best Buy, Walmart.

Shoppers also compared

CT-2000.1D 2000 Watts RMS Monoblock Car Amplifier
CT-1500.1D 1500 Watts RMS Monoblock Car Amplifier
Kicker CXA400.1T
JBL DSP4086
Pioneer GM-D9704
JL Audio VX800/8i
Power Acoustik 2 Ohm 2,500 Watt Max Subwoofer Amplifier
Morel MDSP6/4A

Stores we've priced the DS18 SXE4000.4D Car Audio Amplifier Amp at

Best Buy deals and prices
Walmart deals and prices

More from DS18

DS18 Flush Mount 1 Channel Monoblock Class D Amplifier 900W
DS18 All-in-One Car Audio System 6.5in Speakers 12in Sub + Amp
DS18 G1000.4D
DS18 ION600.1D Compact Full-Range Class D 1-Channel Amplifier 600 Watts RMS
DS18 G3600.4D GEN-X 4-Channel Full-Range Class D Amp
DS18 12" Loaded Amplified Shallow Subwoofer Enclosure 350 Watts Rms
DS18 Dual 8" Loaded Aluminum Subwoofer Enclosure
DS18 GEN-X124D 12" Loaded Ported Subwoofer Enclosure

All DS18 deals and products →

More car audio amplifiers

JL Audio MX280 4 4-Channel Car Amplifier
Pac PAC Audio AmpPRO SUB Advanced Amplifier
JBL DSP4086 8-Channel Class D Car Amplifier with DSP
Alpine S2-S65C 6.5" Component Set S2-S69 6x9" Coaxial Speaker S2-A36F Amplifier
Stinger MT-1000.5
Taramps TS 400X4 4 channels 400 Watts RMS Car Audio Amplifier 2 Ohms
MUSICOZY Bluetooth Audio Power Amplifier S-299
Power Acoustik VA14000D Monoblock Amplifier

No. of Channels

Power Output

RMS, BridgedSource

Amplifier Class