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Alphasonik AS120A 12" 1500 Watts with a Built-in Amplifier Down-Firing Shallow Mount Enclosed for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure

  • Based on 46 reviews
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Availability: 16 left in stock
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Arrives Tuesday, Aug 18
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Size: 12 Inch 1500 Watt Active


Features

  • POWERFUL SUBWOOFER: Experience the Alphasonik AS120A's 12" Shallow Active Downfire Subwoofer that brings every beat to life with a peak power of 1500 watts and RMS of 500 watts. The Downfire Subwoofer Box, with a final impedance of 4 Ohms and a sensitivity of 90dB, ensures an immersive audio experience that's hard to match.
  • BUILT-IN AMPLIFIER: Experience the all NEW AS120A Active down-firing Subs with a built-in 500 Watt / 1500 Watt MAX amplifier. The Truck Subs deliver a sound output that is clear, crisp, and loud, featuring Hi and Low level inputs, crossover, 0-+12dB bass boost, solid nickel plated power terminal blocks and a remote bass knob.
  • QUALITY CONSTRUCTION: Rely on the quality construction of the Car Subwoofer, featuring a Spun Aluminum Cone, Rubber EPDM Surround, and a Copper Wound Kapton Voice Coil. The Small Sub Woofers for Cars not only ensure durability but also enhance the sound quality with MDF Construction and Industrial Strength Carpet.
  • COMPACT DIMENSIONS: Fit the compact dimensions of the Sub Woofer Systems into tight spaces in cars and trucks, measuring 21 x 7 x 14 inches or 534mm x 178mm x 355mm (WxHxD). The Sub and Amp Combo can be mounted vertically or horizontally, making it a perfect fit for a wide range of vehicles.
  • CUSTOMIZABLE AUDIO: The Subwoofer 12 Slim allows you to customize your audio experience with the Low Pass Crossover ranging from 50Hz to 200Hz, and a Bass Boost of 0 to +12dB. With the 12in Sub, you gain complete control over the sound output through the inclusion of Hi & Low Level Inputs, Solid Nickel Plated Terminal Blocks, and a Remote Bass Knob.

Brand: Alphasonik


Speaker Maximum Output Power: 1500 Watts


Frequency Response: 50.2 Hz


Connectivity Technology: Active


Audio Output Mode: Mono


Audio Output Mode: Mono


Mounting Type: Flush Mount


Enclosure Material: MDF Wood


Speaker Type: Subwoofer


Additional Features: Remote Bass Knob


Antenna Location: For Mobile Audio


Subwoofer Diameter: 12 Inches


Color: [BLACK|GRAY]


Is Waterproof: False


Warranty Type: 1 Year Manufacturer


Control Method: Remote


Speaker Size: 12 Inches


Woofer Diameter: 12 Inches


Water Resistance Level: Not Water Resistant


Specific Uses For Product: car audio upgrades, improving audio quality in cars and trucks, tight-space vehicle installations


MP3 player: No


Controller Type: Remote Control


Frequency Response: 50.2 Hz


Number of Audio Channels: 1.0


Impedance: 4 Ohms


Signal-to-Noise Ratio: 90 dB


Connectivity Technology: Active


Subwoofer Connectivity Technology: Wired


Connectivity Protocol: RCA, Speaker-Level


Audio Driver Type: Dynamic Driver


Audio Driver Size: 12 Inches


Number Of Circuits: 1


Brand: Alphasonik


Model Number: AS120A


Model Name: Active Shallow Mount Down Fire Sealed Enclosure


Built-In Media: 12" Active Down Fire Shallow Mount Enclosure, Mounting Brackets, Owner's Manual, Remote Bass Knob


Warranty Description: 1 year manufacturer


Number of Items: 1


Customer Package Type: Standard Packaging


UPC: 810109980147


Global Trade Identification Number: 47


Manufacturer: Alphasonik


Speaker Maximum Output Power: 1500 Watts


Input Voltage: 12 Volts


Number of Power Levels: 13


Unit Count: 1.0 Count


Item Dimensions D x W x H: 14"D x 21"W x 7"H


Item Weight: 28 Pounds


Compatible Devices: Desktop, Laptop, MP3 Player, Projector, Smartphone, Tablet, Television


Compatible with Vehicle Type: Car, Truck


Power Source: Corded Electric


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Aug 18

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Amp built into subwoofer enclosure
Size: 12 Inch 1500 Watt Active
Need 5 gauge wiring kit. Take time running wires and have a continuity test light handy for finding a good ground and to troubleshoot if amp for some reason don't have power. Has good sound. Good bass. Overall if your not looking for super loud bass that's not gonna make your ears ring. This is a good subwoofer. Have it paired with Orion 6.75" speakers. I'm happy with the subwoofer amp enclosure ... show more
Reviewed in the United States on March 27, 2026 by Junk, don’t stick to anything for more than 10 seconds

  • Supplied directions?????
Size: 12 Inch 1500 Watt Active
Only resaon not a 5 star is the directions supplied were lacking. I had to call the company twice to get it to work. Sounds great , plenty of Bass. Great product they just need to fix their directions a bit.
Reviewed in the United States on April 30, 2026 by TYLER D PERSONS

  • Alphasonik
Size: 12 Inch 1500 Watt Active
This was a gift for my son and he loves it. No issues getting it hooked up and working in his Ford Ranger.
Reviewed in the United States on May 18, 2026 by Kim

  • Not very good sound for my installation.
Size: 12 Inch 1500 Watt Active
First things first: Bass is quite variable depending upon how the speaker/box is positioned and pointed, so that can have a dramatic impact on sound. This sub looks really nice, and lists some great features. That being said, I could not get anything close to the sound I was looking for, so I am going to build a baffle board instead. ... show more
Reviewed in the United States on September 6, 2025 by Kevin

  • Well worth your money
Size: 12 Inch 1500 Watt Active
Easy install great sound and perfect I bought a d added to my 2011 Escalade and it sounds awesome with the stock bose stereo
Reviewed in the United States on November 6, 2025 by Quirino Utrera

  • Look elsewhere
Size: 12 Inch 1500 Watt Active
Speaker blew in less than 2 weeks and sucked. My old setups specs was half of what this was advertised at with a 10" sub and kicked twice as hard. Waste of money.
Reviewed in the United States on January 16, 2025 by John Mallia

  • Easy to use
Size: 12 Inch 1500 Watt Active
It won’t win any competitions, but it certainly makes you bass much clearer and will rattle quite a bit at high volumes. I put it under the seat in my work truck, and I have to keep the gain down so people don’t stare. lol. Good purchase for a smallish upgrade to your stock system.
Reviewed in the United States on April 19, 2026 by David M.

  • Great for SUV or Pickup
Size: 12 Inch 1500 Watt Active
Nice clean compact, but just not enough bass. If you want to feel it, go with custom box and spend more money. It did add a good amount but I want my wife to know I am almost home. It would have done great in a truck or SUV, but not the best for trunk of a convertible Camaro. You have to send quite a bit of power to get the bass into the passenger area. ... show more
Reviewed in the United States on November 29, 2025 by Pamela

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