---
product_id: 323276741
title: "In Phase USW12 Car Audio 600W 12\" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium"
brand: "in phase"
price: "€ 462.74"
currency: EUR
in_stock: false
reviews_count: 9
url: https://www.desertcart.hr/products/323276741-in-phase-usw12-car-audio-600w-12-underseat-ultra-slim
store_origin: HR
region: Croatia
---

# Ultra-slim 65mm height 600W max power output Die-cast aluminium chassis In Phase USW12 Car Audio 600W 12" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium

**Brand:** in phase
**Price:** € 462.74
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Elevate your ride with bass that commands attention!

## Quick Answers

- **What is this?** In Phase USW12 Car Audio 600W 12" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium by in phase
- **How much does it cost?** € 462.74 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/323276741-in-phase-usw12-car-audio-600w-12-underseat-ultra-slim)

## Best For

- in phase enthusiasts

## Why This Product

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

## Key Features

- • **Sleek & Ultra-Compact:** Slim 65mm profile fits discreetly under seats or in tight vehicle spaces.
- • **Rugged Aluminium Build:** Durable die-cast aluminium chassis ensures long-lasting, premium quality.
- • **Universal Compatibility:** Works seamlessly with both OEM and aftermarket head units via RCA and high-level inputs.
- • **Powerhouse Bass Performance:** 600W max output delivers deep, rich bass that transforms your drive.
- • **Total Control at Your Fingertips:** Includes a 5-meter remote bass controller for on-the-fly sound tuning.

## Overview

The In Phase USW12 is a 12-inch ultra-slim active subwoofer system delivering up to 600W of powerful bass through a durable die-cast aluminium chassis. Designed for discreet underseat installation, it includes a remote bass controller and supports both OEM and aftermarket head units, making it the perfect upgrade for audiophiles seeking premium sound without sacrificing space.

## Description

In Phase USW12 Car Audio 600W 12" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium : desertcart.co.uk: Electronics & Photo

Review: Great - What can I say. Wasn’t sure how good it was going to be, but was really pleased with the added bass. It’s not earth shattering but is a great upgrade. Fairly easy to install. Come with all the cables you need. Overall highly recommended. Cheers.
Review: Money well spent - Well made, sturdy, nice looking item. Very good sound quality gives that deep low bass that's needed. It doesn't brake windows but you get a quality sound.

## Features

- ALUMINIUM CONED SUBWOOFER - With a built in amplifier powering an aluminium coned subwoofer and a max output of 300W, the In Phase USW10 is a true pocket powerhouse of audio performance
- HEAVY DUTY DURABLE CONSTRUCTION - 6" Aluminium coned sub bass driver housed in a DieCast Aluminium chassis
- COMPACT AND DISCRETE - Allowing you to install the USW10 anywhere within your vehicles Boot, Underseat, behind seat and foot wells. Dimensions 270mm (D) x 65mm (H)
- REMOTE CONTROL - Bass remote included (5 meters)
- COMPTABILITY - RCA and High Level inputs (will work with both OEM and Factory Fitted head units).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B092ZYGFM4 |
| Best Sellers Rank | 69,642 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 41 in Car Enclosed Subwoofer Systems |
| Colour | USW12 |
| Compatible devices | Personal Computer |
| Control method | Remote |
| Customer Reviews | 4.2 4.2 out of 5 stars (29) |
| Date First Available | 20 April 2021 |
| Included components | USW12 Active Enclosure, Wiring Kit, Mounting Brackets, Remote Bass Controller, Instruction Manual |
| Is waterproof | False |
| Item Weight | 4.6 kg |
| Item model number | USW12 |
| Item weight | 4.6 Kilograms |
| Manufacturer | In Phase |
| Manufacturer part number | USW12 |
| Number of items | 1 |
| Power source | Electrical system of a vehicle |
| Product dimensions | 5D x 16W x 5H centimetres |
| Speaker size | 12 Inches |
| Special Features | Ultra-thin and compact design, Die-cast aluminum construction |
| Subwoofer diameter | 12 Inches |
| Surround-sound channel configuration | 2.0 |
| Warranty type | Full |
| Wattage | 600 watts |
| Wireless communication technology | No Wireless Communication Technology |

## Product Details

- **Audio output mode:** Stereo
- **Brand:** In Phase
- **Connectivity technology:** RCA
- **Material:** Aluminium
- **Model name:** USW12
- **Mounting type:** Tabletop
- **Recommended uses for product:** Improving the sound of bass in cars
- **Speaker maximum output power:** 600 Watts
- **Speaker type:** Subwoofer
- **Special feature:** Ultra-thin and compact design, Die-cast aluminum construction

## Images

![In Phase USW12 Car Audio 600W 12" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium - Image 1](https://m.media-amazon.com/images/I/61u0tjTkZEL.jpg)
![In Phase USW12 Car Audio 600W 12" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium - Image 2](https://m.media-amazon.com/images/I/51Idu4g1ZRL.jpg)
![In Phase USW12 Car Audio 600W 12" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium - Image 3](https://m.media-amazon.com/images/I/61F9utJvhmL.jpg)
![In Phase USW12 Car Audio 600W 12" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium - Image 4](https://m.media-amazon.com/images/I/71SiSYMS+zL.jpg)
![In Phase USW12 Car Audio 600W 12" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium - Image 5](https://m.media-amazon.com/images/I/61cw1HHlezL.jpg)

## Questions & Answers

**Q: What is the power cord called**
A: I don't really understand your question. All cables required are included in the box along with clear instructions.

**Q: I already have inphase 300w installed can i just plug this in and will it work with the same wires i already have installed**
A: I dont know but I imagine all in-phase have the same connections, however all wiring and instructions are included

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great
*by I***S on 18 February 2024*

What can I say. Wasn’t sure how good it was going to be, but was really pleased with the added bass. It’s not earth shattering but is a great upgrade. Fairly easy to install. Come with all the cables you need. Overall highly recommended. Cheers.

### ⭐⭐⭐⭐⭐ Money well spent
*by I***I on 15 November 2022*

Well made, sturdy, nice looking item. Very good sound quality gives that deep low bass that's needed. It doesn't brake windows but you get a quality sound.

### ⭐⭐⭐⭐ Perfect for small car set up
*by A***P on 14 April 2025*

Very solid ,well made compact subwoofer. Wasn’t expecting a clean and clear sounding bass , However this subwoofer went beyond expectations. If you’re looking for a clean and clear mid bass, this is a must have system.

## Frequently Bought Together

- In Phase USW12 Car Audio 600W 12" Underseat Ultra Slim Compact Active Subwoofer System, Die-Cast Aluminium
- CableMountain RCA Cables 3m - Gold Plated Male-to-Male Phono to Phono Cable | RCA Audio Cable for Amplifier, Turntable, TV, Home Theater, Speakers and HiFi Systems

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**Shop now:** [https://www.desertcart.hr/products/323276741-in-phase-usw12-car-audio-600w-12-underseat-ultra-slim](https://www.desertcart.hr/products/323276741-in-phase-usw12-car-audio-600w-12-underseat-ultra-slim)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-05*