---
product_id: 532224143
title: "- 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"
brand: "alphasonik"
price: "฿49438"
currency: THB
in_stock: true
reviews_count: 13
category: "Alphasonik"
url: https://www.desertcart.co.th/products/532224143-alphasonik-as120a-12-1500-watts-with-a-built-in-amplifier
store_origin: TH
region: Thailand
---

# Slim 21x7x14 in fit 1500W peak power Remote bass control - 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

**Brand:** alphasonik
**Price:** ฿49438
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your ride’s soundtrack with slim, powerful bass that fits anywhere!

## Quick Answers

- **What is this?** - 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 by alphasonik
- **How much does it cost?** ฿49438 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/532224143-alphasonik-as120a-12-1500-watts-with-a-built-in-amplifier)

## Best For

- alphasonik enthusiasts

## Why This Product

- Trusted alphasonik brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built-In Amplifier:** Integrated 500W amp with hi/low inputs, crossover, and +12dB bass boost for crystal-clear, customizable sound.
- • **Space-Savvy Design:** Slim, shallow mount enclosure fits effortlessly in tight car and truck spaces without sacrificing sound quality.
- • **Total Bass Control:** Fine-tune your vibe with a remote bass knob and adjustable low pass crossover from 50Hz to 200Hz.
- • **Durable Craftsmanship:** Spun aluminum cone, rubber surround, and MDF enclosure ensure long-lasting, high-fidelity performance.
- • **Powerhouse Performance:** Unleash deep, punchy bass with 1500 watts peak power and 500 watts RMS for a rich audio experience.

## Overview

The Alphasonik AS120A is a 12-inch down-firing subwoofer with a built-in 1500W peak amplifier, designed for tight spaces in cars and trucks. Featuring a slim sealed MDF enclosure, it delivers clear, customizable bass with a remote bass knob, 4-ohm impedance, and durable construction including a spun aluminum cone and rubber surround. Perfect for professionals seeking powerful, space-efficient audio upgrades.

## Description

Buy 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: Enclosed Subwoofer Systems - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Works good, fills out the audio nicely, don't expect to rattle the licence plates off - Fit perfectly, sounds good. Coupled with a nice and small Kenwood amp it just works and that's the best outcome I could have hoped for. Using it as a low end filler on an all alpine speaker set 2x 6.5, 2x tweeters, 2x 6x9, and adjusted just so, it fills the low end void they left. I probably wouldn't push this sub, it will probably explode, but for filling a hole in the audio and adding some extra thumps, it works perfectly fine. Best thing I can say is be reasonable with expectations.
Review: Great results from a slim sub - I waited a year to write this review in order to be fair in my assessment and to also be able to speak to the durability of the product. I installed this sub in a Jeep Wrangler and powered it with a Rockford 5-channel amp that is also powering four 6.5s. I didn't want to take up a lot of space in the cargo area with a huge box and I really just wanted to round out the low end; I listen to a lot of classic rock and reggae so I was not looking to shake any windows since only about 10% of what I play falls within the rap or hip-hop genres. Initially, I was pretty underwhelmed with this sub - the first couple weeks gave me average performance at best and I did also experiment with some bass-heavy R&B just to see how it would perform. With the R&B, it produced a dull thud-like sound and with the classic rock, it really didn't sound very good when turned up loud enough to make a difference. But over the next month or so, it started to loosen up and sound more musical than noisy, and after about 3 months of moderate use, I became very happy with it. Again, I was not looking for club-quality bass, I just wanted to add some depth. That being said, it also performs very well now when I pop in some rap or hip-hop. Not a competition sub by any means, but I find myself needing to turn down the bass level for these genres. When the doors and top are off the Jeep, I'll adjust the bass knob a little higher and it is sounds great, even above the wind noise. My bottom line with this sub is that it is an excellent choice for anyone who wants to add nice tone to the lower end of the spectrum. It takes up a surprisingly small amount of space for a 10-inch, and i feel it is a bargain at this price point. The construction of the box itself is also very solid; it's had sports equipment, lawn supplies and such thrown on it, placed on it, been covered with it and a year later, it's no worse off than the day I got it. If you give it time to work itself in, you'll be happy.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BWF766WN |
| Audio Driver Size | 12 Inches |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #57,700 in Electronics ( See Top 100 in Electronics ) #190 in Car Component Subwoofers |
| Compatible Devices | Desktop, Laptop, MP3 Player, Projector, Smartphone, Tablet, Television |
| Control Method | Remote |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.1 4.1 out of 5 stars (326) |
| Date First Available | February 21, 2023 |
| Global Trade Identification Number | 00810109980147 |
| Impedance | 4 Ohms |
| Included Components | 12" Active Down Fire Shallow Mount Enclosure, Mounting Brackets, Owner's Manual, Remote Bass Knob |
| Input Voltage | 12 Volts |
| Is Waterproof | False |
| Item Weight | 28 pounds |
| Item model number | AS120A |
| Manufacturer | Alphasonik |
| Material | MDF Wood |
| Model Name | Active Shallow Mount Down Fire Sealed Enclosure |
| Mounting Type | Flush Mount |
| Number Of Circuits | 1 |
| Number of Items | 1 |
| Number of Power Levels | 13 |
| Power Source | Corded Electric |
| Product Dimensions | 14"D x 21"W x 7"H |
| Recommended Uses For Product | For Mobile Audio |
| Signal-to-Noise Ratio | 90 dB |
| Speaker Size | 12 Inches |
| Speaker Type | Subwoofer |
| Special Feature | Remote Bass Knob |
| Style | 12 Inch 1500 Watt Active |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 12 Inches |
| Surround Sound Channel Configuration | 1.0 |
| UPC | 810109980147 |
| Unit Count | 1.0 Count |
| Warranty Type | 1 Year Manufacturer |
| Water Resistance Level | Not Water Resistant |
| Woofer Diameter | 12 Inches |

## Product Details

- **Audio Output Mode:** Mono
- **Brand:** Alphasonik
- **Connectivity Technology:** Active
- **Frequency Response:** 50.2 Hz
- **Speaker Maximum Output Power:** 1500 Watts

## Images

![- 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 - Image 1](https://m.media-amazon.com/images/I/610Fs9rjSCL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works good, fills out the audio nicely, don't expect to rattle the licence plates off
*by H***S on January 21, 2026*

Fit perfectly, sounds good. Coupled with a nice and small Kenwood amp it just works and that's the best outcome I could have hoped for. Using it as a low end filler on an all alpine speaker set 2x 6.5, 2x tweeters, 2x 6x9, and adjusted just so, it fills the low end void they left. I probably wouldn't push this sub, it will probably explode, but for filling a hole in the audio and adding some extra thumps, it works perfectly fine. Best thing I can say is be reasonable with expectations.

### ⭐⭐⭐⭐⭐ Great results from a slim sub
*by D***E on May 23, 2014*

I waited a year to write this review in order to be fair in my assessment and to also be able to speak to the durability of the product. I installed this sub in a Jeep Wrangler and powered it with a Rockford 5-channel amp that is also powering four 6.5s. I didn't want to take up a lot of space in the cargo area with a huge box and I really just wanted to round out the low end; I listen to a lot of classic rock and reggae so I was not looking to shake any windows since only about 10% of what I play falls within the rap or hip-hop genres. Initially, I was pretty underwhelmed with this sub - the first couple weeks gave me average performance at best and I did also experiment with some bass-heavy R&B just to see how it would perform. With the R&B, it produced a dull thud-like sound and with the classic rock, it really didn't sound very good when turned up loud enough to make a difference. But over the next month or so, it started to loosen up and sound more musical than noisy, and after about 3 months of moderate use, I became very happy with it. Again, I was not looking for club-quality bass, I just wanted to add some depth. That being said, it also performs very well now when I pop in some rap or hip-hop. Not a competition sub by any means, but I find myself needing to turn down the bass level for these genres. When the doors and top are off the Jeep, I'll adjust the bass knob a little higher and it is sounds great, even above the wind noise. My bottom line with this sub is that it is an excellent choice for anyone who wants to add nice tone to the lower end of the spectrum. It takes up a surprisingly small amount of space for a 10-inch, and i feel it is a bargain at this price point. The construction of the box itself is also very solid; it's had sports equipment, lawn supplies and such thrown on it, placed on it, been covered with it and a year later, it's no worse off than the day I got it. If you give it time to work itself in, you'll be happy.

### ⭐⭐⭐⭐⭐ Decent bass response!
*by I***A on November 30, 2025*

Was able to fit this under the drivers seat of my 2016 Wrangler with a little bit of ingenuity. Sounds great for the price.

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-07*