---
product_id: 532224143
title: "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: "฿32027"
currency: THB
in_stock: true
reviews_count: 8
category: "Alphasonik"
url: https://www.desertcart.co.th/products/532224143-as120a-12-1500-watts-with-a-built-in-amplifier-down
store_origin: TH
region: Thailand
---

# Slim 21x7x14 in fit 1500W peak power Remote bass control 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:** ฿32027
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your drive with bass that fits and flexes!

## Quick Answers

- **What is this?** 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?** ฿32027 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-as120a-12-1500-watts-with-a-built-in-amplifier-down)

## 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

- • **Durable Premium Build:** Spun aluminum cone, rubber surround, and rugged MDF enclosure ensure long-lasting performance and style.
- • **Versatile Audio Control:** Hi/Low level inputs, 4 Ohm impedance, and remote bass knob put you in full command of your soundscape.
- • **Slim, Space-Saving Design:** Engineered for tight spots—perfect for cars and trucks where every inch counts.
- • **Powerful 1500W Peak Output:** Feel every beat with deep, rich bass that fills your ride without overpowering your space.
- • **Built-In Amplifier with Bass Boost:** Integrated 500W amp plus adjustable +12dB bass boost for customizable sound that matches your vibe.

## Overview

The Alphasonik AS120A is a 12-inch shallow mount down-firing subwoofer with a built-in 1500W peak amplifier, designed for tight spaces in cars and trucks. Featuring a durable spun aluminum cone, rubber surround, and MDF enclosure, it delivers clear, customizable bass with a remote bass knob and adjustable crossover. Compact yet powerful, it’s ideal for millennials seeking premium sound without sacrificing space.

## 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 |
| Additional Features | Remote Bass Knob |
| Antenna Location | For Mobile Audio |
| Audio Driver Size | 12 Inches |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Mono |
| Best Sellers Rank | #40,188 in Electronics ( See Top 100 in Electronics ) #126 in Car Component Subwoofers |
| Brand | Alphasonik |
| Built-In Media | 12" Active Down Fire Shallow Mount Enclosure, Mounting Brackets, Owner's Manual, Remote Bass Knob |
| Compatible Devices | Desktop, Laptop, MP3 Player, Projector, Smartphone, Tablet, Television |
| Compatible with Vehicle Type | Car, Truck |
| Connectivity Protocol | RCA, Speaker-Level |
| Connectivity Technology | Active |
| Control Method | Remote |
| Controller Type | Remote Control |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.2 out of 5 stars 333 Reviews |
| Enclosure Material | MDF Wood |
| Frequency Response | 50.2 Hz |
| Global Trade Identification Number | 00810109980147 |
| Impedance | 4 Ohms |
| Input Voltage | 12 Volts |
| Is Waterproof | False |
| Item Dimensions D x W x H | 14"D x 21"W x 7"H |
| Item Weight | 28 Pounds |
| MP3 player | No |
| Manufacturer | Alphasonik |
| Model Name | Active Shallow Mount Down Fire Sealed Enclosure |
| Model Number | AS120A |
| Mounting Type | Flush Mount |
| Number Of Circuits | 1 |
| Number of Audio Channels | 1.0 |
| Number of Items | 1 |
| Number of Power Levels | 13 |
| Power Source | Corded Electric |
| Signal-to-Noise Ratio | 90 dB |
| Speaker Maximum Output Power | 1500 Watts |
| Speaker Size | 12 Inches |
| Speaker Type | Subwoofer |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 12 Inches |
| UPC | 810109980147 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 year manufacturer |
| 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

![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)

## Available Options

This product comes in different **Style** options.

## 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.

## Frequently Bought Together

- 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
- BOSS Audio Systems KIT2 8 Gauge Complete Car Amplifier Installation Wiring Kit with Power Cables, Ground Cables, Turn-On Wire, Speaker Wire, Terminals
- Kicker 46KISLOC2 K-Series Stereo Line-Output Converter w/Remote Turn-On Output

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.th/products/532224143-as120a-12-1500-watts-with-a-built-in-amplifier-down](https://www.desertcart.co.th/products/532224143-as120a-12-1500-watts-with-a-built-in-amplifier-down)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-30*