---
product_id: 336827734
title: "Alpine SWT-12S4 1500W Max (300W RMS) Single 12\" Sealed Subwoofer Tube Enclosure"
brand: "alpine"
price: "R15393"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Alpine"
url: https://www.desertcart.co.za/products/336827734-alpine-swt-12s4-1500w-max-300w-rms-single-12-sealed
store_origin: ZA
region: South Africa
---

# 28-200Hz Frequency Response 12-inch Driver Size 1500W Max Power Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure

**Brand:** alpine
**Price:** R15393
**Availability:** ✅ In Stock

## Summary

> 🎵 Feel the Pulse, 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?** R15393 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/336827734-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

- • **Rugged & Ready:** Heavy-duty grill and durable carpet finish ensure your subwoofer stays protected and stylish.
- • **Sealed Tube Enclosure:** Optimized for tight, punchy bass that elevates every beat without distortion.
- • **Plug & Play Installation:** Includes brackets and belts for a hassle-free setup that fits seamlessly in your vehicle.
- • **Precision-Tuned 12" Driver:** Experience crystal-clear low frequencies with a perfectly sized subwoofer for your ride.
- • **Booming Bass, No Compromise:** Unleash deep, rich bass with 1500W peak power that commands attention.

## Overview

The Alpine SWT-12S4 is a high-performance 12-inch sealed subwoofer tube enclosure delivering up to 1500W peak power and 300W RMS. Designed for deep, precise bass with a frequency response of 28-200Hz, it features a rugged build with a heavy-duty grill, included installation brackets, and a sleek black carpet finish. Perfect for car audio enthusiasts seeking powerful, distortion-free low-end that transforms any drive into an immersive sound experience.

## 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: Works beautifully... - Bad ass bass... Love it... God bless you all at desertcart...
Review: For Deep Not Fast Bass - 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.

## 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 |
| Additional Features | High-Performance Tube Enclosure, Heavy-Duty Grill, Included Installation Brackets and Belts |
| Antenna Location | For Televisions |
| Audio Driver Size | 12 Inches |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Surround |
| Audio output mode | Surround |
| Best Sellers Rank | #73,603 in Electronics ( See Top 100 in Electronics ) #396 in Car Audio Speakers & Subwoofers |
| Bluetooth Range | 10 Meters |
| Brand | Alpine |
| Built-In Media | Installation Brackets and Belts |
| Color | black |
| Compatible Devices | Laptop, Smartphone, Tablet |
| Compatible with Vehicle Type | Car, Other Vehicles |
| Connectivity Protocol | Bluetooth |
| Connectivity Technology | Bluetooth, Wired |
| Connectivity technology | Bluetooth, Wired |
| Control Method | Touch |
| Controller Type | Button Control, Voice Control |
| Customer Package Type | FFP |
| Customer Reviews | 4.5 out of 5 stars 276 Reviews |
| EU Spare Part Availability Duration | 7 Years |
| Enclosure Material | Carpet, Metal, Paper/Polypropylene, Rubber/Foam |
| Frequency Response | 28 Hz |
| Frequency response | 28 Hz |
| Impedance | 4 Ohms |
| Is Waterproof | False |
| Item Dimensions D x W x H | 32.4D x 66W x 32.4H centimeters |
| Item Weight | 25 Grams |
| MP3 player | No |
| Manufacturer | Alpine |
| Model Name | SWT-12S4 |
| Model Number | SWT-12S4 |
| Mounting Type | Tabletop |
| Mounting type | Tabletop |
| Number Of Circuits | 1 |
| Number of Audio Channels | 1.0 |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Processor Count | 1 |
| Speaker Maximum Output Power | 1000 Watts |
| Speaker Size | 12 Inches |
| Speaker Type | Subwoofer |
| Speaker maximum output power | 1000 Watts |
| Specific Uses For Product | Home entertainment systems |
| Subwoofer Connectivity Technology | Wireless |
| Subwoofer Diameter | 12 Inches |
| Tweeter Diameter | 12 Inches |
| UPC | 793276242525 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology | Bluetooth |
| Woofer Diameter | 12 Inches |

## Product Details

- **Audio output mode:** Surround
- **Brand:** Alpine
- **Connectivity technology:** Bluetooth, Wired
- **Frequency response:** 28 Hz
- **Speaker maximum output power:** 1000 Watts

## 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)
![Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure - Image 2](https://m.media-amazon.com/images/I/61VfXdiCaQL.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

### ⭐⭐⭐⭐⭐ Works beautifully...
*by M***N on 20 August 2026*

Bad ass bass... Love it... God bless you all at Amazon...

### ⭐⭐⭐⭐⭐ For Deep Not Fast Bass
*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.

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

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

## 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 South Africa*
*Store origin: ZA*
*Last updated: 2026-09-13*