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X 4-Channel Ultra Compact Class D Amplifier

X 4-Channel Ultra Compact Class D Amplifier

5(11 ratings)

Best price now

$179.95at Best Sound Car AudioChecked 2 h ago

20% under what the other stores charge

Compared across 22 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $179.95 at Best Sound Car Audio (checked Nov 12, 2026).
  • Checked at 22 stores.

Our take on the X 4-Channel Ultra Compact Class D Amplifier

The DS18 X4 is an ultra-compact full-range Class D 4-channel car amplifier. It delivers 70 watts per channel at 4 ohms, 140 watts at 2 ohms, and 220 watts bridged at 4 ohms, all from a chassis about the size of a cell phone. It suits enthusiasts with limited space, such as motorcycle, marine, and powersports audio builds. Compared to larger amps, it trades ultimate power for a tiny footprint, and owners praise its output for the size.

Best forMotorcycle fairing installationsPowersports and marine audioCar audio with tight spacePowering mids, highs, and tweeters
Pros
  • Very small footprint for easy mounting
  • Class D design for efficiency
  • Flexible 4-channel and bridged configurations
  • High power output for its size
Cons
  • Limited power for subwoofers or high-demand systems
  • May require careful installation for best results

X 4-Channel Ultra Compact Class D Amplifier prices at every store

  • Best Sound Car AudioNew

    In stock

    $179.95Checked 2 h ago
    Visit Best Sound Car Audio
  • Platinum High Performance Solutions, LLC.New

    In stockReturn policy

    $215.95Checked 2 h ago
    Visit Platinum High Performance Solutions, LLC.
  • DS18New

    In stock

    $224.95Free shippingChecked 2 h ago
    Visit DS18
  • Factory Direct Car AudioNew

    In stockReturn policy

    $224.95Checked 2 h ago
    Visit Factory Direct Car Audio
  • DB's Car AudioNew

    In stockReturn policy

    $224.95Checked 2 h ago
    Visit DB's Car Audio
  • CybervalueNew

    In stockReturn policy

    $224.95Checked 2 h ago
    Visit Cybervalue
  • diycustoms.storeNew

    In stockReturn policy

    $224.95Checked 2 h ago
    Visit diycustoms.store
  • HiRevzGarage.comNew

    In stockReturn policy

    $224.95Checked 2 h ago
    Visit HiRevzGarage.com
  • G-Life UTV Shop PartsNew

    In stockReturn policy

    $224.95Checked 2 h ago
    Visit G-Life UTV Shop Parts
  • Jeep and Truck PartsNew

    In stock

    $224.95Checked 2 h ago
    Visit Jeep and Truck Parts
  • SubimodsNew

    In stock

    $224.95+ $14.99 shippingChecked 2 h ago
    Visit Subimods
  • BigJeffOnlineNew

    In stock

    $224.95+ $19.90 shippingChecked 2 h ago
    Visit BigJeffOnline
  • Creative AudioNew

    Availability unknown

    $215.95Checked 2 h ago
    Visit Creative Audio
  • AutoZoneNew

    Availability unknown

    $215.99Checked 2 h ago
    Visit AutoZone
  • Pro Audio CenterNew

    Availability unknown

    $224.95Checked 2 h ago
    Visit Pro Audio Center
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $224.95Free shippingChecked 2 h ago
    Visit Amazon
  • WalmartNew

    Availability unknown

    $224.95Checked 2 h ago
    Visit Walmart
  • SonicElectronix.comNew

    Availability unknown

    $224.95Checked 2 h ago
    Visit SonicElectronix.com
  • Lift Kits 4 LessNew

    Availability unknown

    $224.95Checked 2 h ago
    Visit Lift Kits 4 Less
  • AmericanTrucks.comNew

    Availability unknown

    $224.95Checked 2 h ago
    Visit AmericanTrucks.com
  • ExtremeTerrain.comNew

    Availability unknown

    $224.95Checked 2 h ago
    Visit ExtremeTerrain.com
  • eBayNew

    Availability unknownSold by hookedontronics

    $226.95Checked 2 h ago
    Visit eBay

Also available at

  • DS18Check price at DS18
  • Big Jeff Online IncCheck price at Big Jeff Online Inc
  • Pro Audio CenterCheck price at Pro Audio Center

Store links may earn us a commission.

X 4-Channel Ultra Compact Class D Amplifier price history

Lowest price we've seen: $179.95 on Nov 13 at Best Sound Car Audio. Tracked across 15 stores since Nov 13.

What reviewers say

  • 5 / 511 ratings

Owners rate the DS18 X4 highly, with an average of 5 out of 5 from 11 ratings. They praise its compact size and surprising power output for the footprint.

What people mention
  • SizePraisedOwners love how small the amplifier is, making it easy to fit in tight spaces.
  • PowerPraisedReviewers are impressed with the power output relative to the amplifier's size.
  • InstallationPraisedThe compact design makes installation straightforward in various vehicles.

About the X 4-Channel Ultra Compact Class D Amplifier

The DS18 X4 is an ultra compact full range Class D 4-channel car amplifier rated at 1320 watts max. It is about as large as a cell phone, for installs with little room to mount a larger amp.

It delivers 70 W x 4 at 4 ohms, 140 W x 4 at 2 ohms, and 220 W x 2 bridged at 4 ohms. That power can drive most mids, highs, and tweeters.

The X4 is suited to car, motorcycle, marine, powersports, Jeep, and pro audio. It has a selectable crossover (LPF, flat, or HPF) and LEDs that show power and protection status.

Model
X4
Type
Class D, 4-channel, full range
Max Power
1320 watts
RMS Power @ 4 Ohms
70 W x 4 channels
RMS Power @ 2 Ohms
140 W x 4 channels
RMS Power Bridged
220 W x 2 channels at 4 ohms
Frequency Response
20 Hz - 20 kHz
Signal/Noise Ratio
>90 dB
Crossover
Selectable LPF / Flat / HPF
Fixed LPF Frequency
80 Hz
Low Level Input Range
0.2 - 5 V
Input Configuration
2-channel / 4-channel
Indicators
LEDs for power and protection status
Dimensions
140.8 mm L x 82.4 mm W x 34 mm H

Questions and answers

What are the power ratings of the DS18 X4?
It produces 70 watts x 4 at 4 ohms, 140 watts x 4 at 2 ohms, and 220 watts x 2 bridged at 4 ohms.
Is the DS18 X4 suitable for subwoofers?
It is a full-range amplifier designed for mids, highs, and tweeters. For subwoofers, a dedicated mono amplifier is better.
Can the DS18 X4 be used in a motorcycle?
Yes, its ultra-compact size makes it ideal for motorcycle fairing installations.
What is included with the DS18 X4?
The package includes the amplifier and mounting hardware. Check the listing for details.
How does the DS18 X4 compare to larger amplifiers?
It offers less maximum power but takes up far less space, making it ideal for compact installations.
Where is the X 4-Channel Ultra Compact Class D Amplifier cheapest?
At Best Sound Car Audio, for $179.95, 20% under what the other stores charge, as of our latest check.
What do buyers say about the X 4-Channel Ultra Compact Class D Amplifier?
Rated 5 out of 5 from 11 ratings.
Where can I buy the X 4-Channel Ultra Compact Class D Amplifier?
22 stores we checked sell it, including DS18, BigJeffOnline, Pro Audio Center, Factory Direct Car Audio, DB's Car Audio.

Stores we've priced the X 4-Channel Ultra Compact Class D Amplifier at

  • BigJeffOnline deals and prices
  • Creative Audio deals and prices
  • SonicElectronix.com deals and prices
  • Walmart deals and prices

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