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XMAXXX
XMAXXX Monster 12″ Car Subwoofer

XMAXXX Monster 12″ Car Subwoofer

5(5 ratings)

Best price now

$564.99at eBayChecked 1 h ago

23% under what the other stores charge

Compared across 10 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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Price facts

  • Lowest price today: $564.99 at eBay (checked Nov 11, 2026).
  • Checked at 10 stores.

Our take on the XMAXXX Monster 12″ Car Subwoofer

The American Bass XMAXXX Monster 12 is a high-power car subwoofer built for serious SPL and daily bass. It uses a blue powder-coated basket, a large voice coil, and a stiff cone with blue stitching. The 12-inch version is rated at 3,000W RMS (peak 6,000W), while the 15-inch version claims 4,000W RMS. Owners praise its output and looks, but it needs a powerful amplifier and a custom enclosure to perform well. It competes with other high-power subs like the Sundown Audio SA series and DC Audio Level 3, which offer similar power handling but may have different suspension and cooling designs.

Best forCar audio enthusiasts who want extreme bass outputCompetition SPL setupsListeners who play bass-heavy music at high volumesOwners with space for a large, custom-built enclosure
Pros
  • Very high power handling (3,000W RMS for the 12-inch)
  • Sturdy build with a heavy-duty basket and large voice coil
  • Distinctive blue powder-coated finish and stitched surround
  • Capable of very high sound pressure levels in the right enclosure
Cons
  • Requires a high-output amplifier and electrical upgrades
  • Needs a large, well-built enclosure to sound its best
  • Heavy and bulky, taking up significant trunk space
  • Limited availability and support compared to mainstream brands

XMAXXX Monster 12″ Car Subwoofer prices at every store

  • eBayNew

    In stockSold by www-designer-motorsports-com

    $564.99Free shippingChecked 1 h ago
    Visit eBay
  • American Bass WholesaleNew

    In stockReturn policy

    $576.95Checked 1 h ago
    Visit American Bass Wholesale
  • American Bass AudioNew

    In stock

    $659.75Free shippingChecked 1 h ago
    Visit American Bass Audio
  • American Bass AudioNew

    In stockReturn policy

    $659.75Checked 1 h ago
    Visit American Bass Audio
  • Alternator OutletNew

    In stockReturn policy

    $659.99Checked 1 h ago
    Visit Alternator Outlet
  • JS Ultimate SoundsNew

    In stockReturn policy

    $824.64Checked 1 h ago
    Visit JS Ultimate Sounds
  • SonicElectronix.comNew

    In stock

    $824.69Free shippingChecked 1 h ago
    Visit SonicElectronix.com
  • Trinity Car AudioNew

    In stockReturn policy

    $899.99Checked 1 h ago
    Visit Trinity Car Audio
  • 4StarAudioNew

    In stockReturn policy

    $1,033.56Checked 1 h ago
    Visit 4StarAudio
  • AmazonNew

    Availability unknown

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

    $733.06Free shippingChecked 1 h ago
    Visit Amazon

Store links may earn us a commission.

XMAXXX Monster 12″ Car Subwoofer price history

Lowest price we've seen: $564.99 on Nov 11 at eBay. Tracked across 4 stores since Nov 11.

What reviewers say

Owner feedback is limited but generally positive, with users highlighting the subwoofer's impressive output and build quality. Some note that it demands a powerful amplifier and a proper enclosure to avoid damage and achieve optimal performance.

What people mention
  • Power handlingPraisedOwners say it handles rated power well and produces very loud bass.
  • Build qualityPraisedThe heavy basket and large voice coil are seen as durable and well-made.
  • Amplifier requirementsCriticisedReviewers note that it needs a high-output amplifier, which adds significant cost.
  • Enclosure needsMixedIt performs best in a large, custom-built enclosure, which may not suit all vehicles.
  • SizeCriticisedThe subwoofer is heavy and takes up a lot of space, especially in smaller cars.

About the XMAXXX Monster 12″ Car Subwoofer

The XMAXXX Monster is a 12-inch car subwoofer from American Bass. It has a blue powder-coated basket and a matching surround with blue stitching.

It has a 3.5-inch voice coil and a 321 oz magnet. It is rated at 3000 watts RMS and 6000 watts max power.

Size
12 inches
RMS power
3000 W
Max power
6000 W
Impedance
D1/D2
Sensitivity
84.7/85.9 dB
Voice coil
3.5 inches
Magnet
321 oz
Mounting depth
9.17 inches
Cutout size
11.4 inches
Ported box
2.75 cu ft

Questions and answers

What amplifier power does the XMAXXX Monster 12 need?
It is rated at 3,000W RMS, so you need an amplifier that can deliver close to that power at the subwoofer's impedance. A high-output monoblock amp and upgraded electrical system are recommended.
What size enclosure does the XMAXXX Monster 12 require?
American Bass does not publish a recommended enclosure size, but owners report that it works best in a large ported box tuned low. Expect to need a custom-built enclosure for optimal performance.
Is the XMAXXX Monster 12 suitable for daily driving?
Yes, if you have the space and power to support it. It can play loud and low for daily listening, but its size and power demands make it less practical for small vehicles or stock electrical systems.
How does the XMAXXX Monster 12 compare to the 15-inch version?
The 15-inch version has a higher RMS rating (4,000W vs 3,000W) and moves more air, so it can play louder and lower. However, it requires even more space and power.
What is included with the XMAXXX Monster 12?
The subwoofer is sold individually. It does not include an enclosure, wiring, or amplifier. You will need to purchase those separately.
Where is the XMAXXX Monster 12″ Car Subwoofer cheapest?
At eBay, for $564.99, 23% under what the other stores charge, as of our latest check.
What do buyers say about the XMAXXX Monster 12″ Car Subwoofer?
Rated 5 out of 5 from 5 ratings.
Where can I buy the XMAXXX Monster 12″ Car Subwoofer?
9 stores we checked sell it, including American Bass Audio, American Bass Wholesale, 4StarAudio, Trinity Car Audio, Alternator Outlet.

Stores we've priced the XMAXXX Monster 12″ Car Subwoofer at

  • American Bass Audio deals and prices
  • SonicElectronix.com deals and prices