---
product_id: 176765589
title: "Alpine SWT-12S4 1500W Max (300W RMS) Single 12\" Sealed Subwoofer Tube Enclosure"
brand: "alpine"
price: "$698.46"
currency: USD
in_stock: true
reviews_count: 5
category: "Alpine"
url: https://www.desertcart.us/products/176765589-alpine-swt-12s4-1500w-max-300w-rms-single-12-sealed
store_origin: US
region: United States of America
---

# 92dB Sensitivity 12-inch Subwoofer Size 1500W Max Power Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure

**Brand:** alpine
**Price:** $698.46
**Availability:** ✅ In Stock

## Summary

> 🎵 Drive the Beat, Own the Road!

## Quick Answers

- **What is this?** Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure by alpine
- **How much does it cost?** $698.46 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/176765589-alpine-swt-12s4-1500w-max-300w-rms-single-12-sealed)

## Best For

- alpine enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Heavy-duty subwoofer grill protects your investment while adding sleek Alpine style.
- • **Power That Moves You:** Experience thunderous bass with a peak power of 1500W, designed to elevate every drive.
- • **Precision Bass Control:** Sealed tube enclosure optimizes sound channeling for deep, punchy lows without distortion.
- • **Effortless Installation:** Comes with sturdy brackets and belts for a secure, hassle-free setup in any vehicle.
- • **Perfect Fit, Perfect Sound:** Compact 12.75” x 26” design fits seamlessly in your trunk, maximizing space and bass impact.

## Overview

The Alpine SWT-12S4 is a high-performance 12-inch sealed subwoofer tube enclosure delivering up to 1500W peak power and 300W RMS. With a frequency response of 28-200Hz and 92dB sensitivity, it produces deep, rich bass ideal for car audio enthusiasts seeking premium sound quality. Its compact design, included installation hardware, and durable grill make it a reliable and stylish upgrade for any vehicle.

## Description

1500W Max Single 12" Sealed Subwoofer Tube Enclosure 12” (30cm) High-Performance Subwoofer Peak Power: 1500W RMS Power: 300W Overall Dimensions 12.75” x 26” Frequency Response 28-200Hz Speaker Impedance: 4 Ω Sensitivity: 92dB/W (1m) Stitched Alpine Logo Included Installation Brackets and Belts Heavy Duty Subwoofer Grill Subwoofer Features: 12" Passive Subwoofer Push SPK Terminal Voice coil size/type Sensitivity: 92dB Enclosure Features: Tube enclosure Black Carpet Finish with White Alpine Logo Grille included

Review: I bought my 12" Alpine sub for VW Passat. First was 8" 150W one :-( Alpine Fits perfectly with extra room left in any dimention. Quick easy connection with banana plugs. In my case plugs not so secure in place. Had disconnection issue. Always mount and secure sub to the floor before use. Do not let it roll in the trunk for max performance. Or operating at all lol Sub very boomy on max. I would recomment installation of Bass knob too for volume adjustment. Tube subs Not situable for quick bass. Like in Techno music. Pop music sounds wonderfull. Bass Very deep and enjoyfull with right music.
Review: Très peu spacieux et très efficace, de très bonne performance… bonne basse! 👍

## Features

- 1500W Max Single 12-inch sealed subwoofer is perfect for maximizing bass
- Reinforces overall bass output
- Helps to channel sound and improve performance
- Includes installation brackets and belts
- Features a heavy-duty subwoofer grill

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07MXND918 |
| Best Sellers Rank | 221,561 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 160 in Car Enclosed Subwoofer Systems |
| Colour | black |
| Compatible devices | Laptop, Smartphone, Tablet |
| Control method | Touch |
| Guaranteed software updates until | unknown |
| Impedance | 4 Ohms |
| Included components | Heavy Duty Subwoofer Grill, Installation Brackets and Belts |
| Is waterproof | False |
| Item model number | SWT-12S4 |
| Item weight | 25 Grams |
| Manufacturer | Alpine |
| Number of items | 1 |
| Power source | Corded Electric |
| Product dimensions | 32.4D x 66W x 32.4H centimetres |
| Recommended uses for product | For cars or other vehicles |
| Speaker size | 12 Inches |
| Subwoofer diameter | 12 Inches |
| Surround-sound channel configuration | 1.0 |
| Warranty type | Extended |
| Wireless communication technology | Bluetooth |

## Product Details

- **Audio output mode:** Surround
- **Brand:** Alpine
- **Connectivity technology:** Bluetooth, Wired
- **Frequency response:** 200 Hz
- **Material:** Carpet, Metal, Paper/Polypropylene, Rubber/Foam
- **Model name:** SWT-12S4
- **Mounting type:** Floor Standing
- **Speaker maximum output power:** 1000 Watts
- **Speaker type:** Subwoofer
- **Special feature:** Push SPK Terminal, Bluetooth Connectivity

## Images

![Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure - Image 1](https://m.media-amazon.com/images/I/51oquWDcjyL.jpg)

## Questions & Answers

**Q: Is an amp needed with this or is there one preinstalled?**
A: You will need an amp. I have an Autotek 1500 class D. A bet overpowered but gains and crossover set right. Sounds pretty good, yet struggles at super low notes. I plan on upgrading the sub later. Good build, solid.

**Q: Is that a port I see in the image?**
A: Exactly what I saw.. ported in picture but sealed in listing. They need to get it together

**Q: What do you mean by fast bass?**
A: It doesn’t have to wait to warm up the voice coil

**Q: Is a kenwood xr601-1 excelon 600-watt monoblock rated at 400 watts rms at 4 ohms single to much amp for this subwoofer?**
A: Nope...I have that much power and still believe it can handle more

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by N***S on 18 February 2021*

I bought my 12" Alpine sub for VW Passat. First was 8" 150W one :-( Alpine Fits perfectly with extra room left in any dimention. Quick easy connection with banana plugs. In my case plugs not so secure in place. Had disconnection issue. Always mount and secure sub to the floor before use. Do not let it roll in the trunk for max performance. Or operating at all lol Sub very boomy on max. I would recomment installation of Bass knob too for volume adjustment. Tube subs Not situable for quick bass. Like in Techno music. Pop music sounds wonderfull. Bass Very deep and enjoyfull with right music.

### ⭐⭐⭐⭐⭐ Review
*by S***A on 20 June 2021*

Très peu spacieux et très efficace, de très bonne performance… bonne basse! 👍

### ⭐⭐⭐⭐⭐ Review
*by B***. on 15 July 2021*

This thing hits hard. I have it hooked up to a Rockville that pushes 360 watts rms. I tuned the amp to the subwoofer and when the bass drops you feel your insides shaking and it almost takes your breath away! My windshield shakes so hard my rearview mirror won't stay in position! I do have the gain turned down on my amp slightly to match the recommended rms watts of the subwoofer. For the price and the quality of sound I would definitely recommend to friends, family and neighbors or anyone else asking "WHAT DO YOU HAVE IN THERE?!"

## Frequently Bought Together

- Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure
- Skar Audio 4 Gauge Amplifier Wiring Kit - Blue, Copper Clad Aluminum, SKAR4ANL-CCA
- Alpine S-A60M S-Series Class D Mono Amplifier

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-20*