---
product_id: 382747521
title: "Alpine SWT-12S4 1500W Max (300W RMS) Single 12\" Sealed Subwoofer Tube Enclosure"
brand: "alpine"
price: "€ 340.95"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.hr/products/382747521-alpine-swt-12s4-1500w-max-300w-rms-single-12-sealed
store_origin: HR
region: Croatia
---

# 12-inch Subwoofer 1500W Max Power Heavy-Duty Grill Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure

**Brand:** alpine
**Price:** € 340.95
**Availability:** ❌ Out of Stock

## Summary

> 🚗 Feel the bass, own the road with Alpine’s powerhouse subwoofer!

## 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?** € 340.95 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/382747521-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

- • **Engineered for Clarity:** 92dB sensitivity and 4-ohm impedance ensure crisp, distortion-free sound at every volume.
- • **Effortless Installation:** Includes brackets and belts for a secure, hassle-free setup—get bass booming fast.
- • **Bass That Commands Attention:** 1500W max power delivers earth-shaking lows that make your ride unforgettable.
- • **Precision-Tuned 12-Inch Driver:** Optimized size for deep, punchy bass that fits perfectly in your car’s trunk.
- • **Built to Last, Built to Protect:** Heavy-duty subwoofer grill guards your investment from road debris and damage.

## Overview

The Alpine SWT-12S4 is a 12-inch sealed subwoofer tube enclosure designed for car audio enthusiasts seeking powerful, clear bass. With a peak power of 1500W and RMS of 300W, it delivers deep, punchy lows while its heavy-duty grill and included installation hardware ensure durability and easy setup. Perfect for upgrading your vehicle’s sound system with professional-grade performance.

## Description

Description: With 1000W peak power handling, this ready-to-use bass reflex subwoofer tube is just the thing for big bass fans. A protective grille ensures that nothing sliding around in the trunk damages the woofer Features: ALPINE SWT-12S4 1000w 12" Car Audio Subwoofer in Bass Tube Enclosure 4-Ohm Sub Speaker System: Bass Reflex Type 12 (30cm) High-Performance Subwoofer Peak Power: 1000W RMS Power: 300W Overall Dimensions: 12.75" x 25.98" Frequency Response 28 - 200Hz Speaker Impedance: 4 Sensitivity: 92dB/W (1m) Stitched Alpine Logo Included Installation Brackets and Belts Heavy Duty Subwoofer Grill

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 |
|---------------|-------|
| Mounting Type | Tabletop Mount |
| Model Name | SWT-12S4 |
| Speaker Type | Subwoofer |
| Special Feature | subwoofer |
| Recommended Uses For Product | Car |
| Compatible Devices | Car Audio System, Smartphone |
| Subwoofer Diameter | 12 Inches |
| Surround Sound Channel Configuration | 1 |
| Product Dimensions | 32.4D x 66W x 32.4H Centimeters |
| Item Weight | 25 Grams |
| Impedance | 4 Ohm |
| Is Waterproof | false |
| Number of Items | 1 |
| Control Method | Touch |
| Wireless Communication Technology | Bluetooth |
| Speaker Size | 12 Inches |
| Power Source | Battery Powered |
| Brand Name | Alpine |
| Vehicle Speaker Size | 12 inch |
| Sensitivity (db) | 92 dB |
| Item model number | SWT-12S4 |
| Manufacturer | Alpine |
| Item Weight | 25 g |

## Product Details

- **Brand:** Alpine
- **Speaker Maximum Output Power:** 1000 Watts
- **Frequency Response:** 28 Hz
- **Connectivity Technology:** Bluetooth
- **Audio Output Mode:** Stereo

## Images

![Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure - Image 1](https://m.media-amazon.com/images/I/31iQEx8hr1L._SS40_.jpg)
![Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure - Image 2](https://m.media-amazon.com/images/I/31sxGmu1M2L._SS40_.jpg)
![Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure - Image 3](https://m.media-amazon.com/images/I/51oquWDcjyL._SL1080_.jpg)
![Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure - Image 4](https://m.media-amazon.com/images/I/51oquWDcjyL._SX679_.jpg)
![Alpine SWT-12S4 1500W Max (300W RMS) Single 12" Sealed Subwoofer Tube Enclosure - Image 5](https://m.media-amazon.com/images/I/61VfXdiCaQL._SX679_.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 Croatia*
*Store origin: HR*
*Last updated: 2026-05-23*