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- In Phase USW300 Underseat Subwoofer | Car Sub...
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Item #:
58788741
In Phase USW300 Underseat Subwoofer | Car Subwoofer with Built in Amplifier | 300W Active Subwoofer Car | Compact Design Under Seat Subwoofer Car |
90% of respondents would recommend this to a friend
Item #:
58788741
TTD 1163
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from UK
33%
In stock
Imported from UK store
QTY:
Order now and get it around Monday, September 28
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The In Phase USW 300 is a superior subwoofer, designed to provide amazing bass response and unmatched responsiveness.
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What Stands Out
Compact Design
The Phase USW300's compact design fits seamlessly under your car seat, maximizing space while delivering powerful sound, ensuring a deep bass experience without compromising passenger comfort.
Built-in Amplifier
Equipped with a powerful built-in amplifier, the USW300 delivers impressive 300W performance, eliminating the need for additional equipment and making installation quick and easy for any car audio enthusiast.
Durable Construction
Crafted with heavy-duty materials, this subwoofer ensures longevity and reliability, making it an ideal choice for those seeking a robust audio solution that withstands the rigors of daily use.
Product Details
- RICH POWERFUL BASE - Built-in amplifier with 300W max output and 130W RMS
- ALUMINIUM CONED SUBWOOFER - Lightweight, stiff and robust cones with built-in damping material
- HEAVY DUTY DURABLE CONSTRUCTION - Die Cast Aluminium Chassis for secure and rigid structure
- COMPACT AND DISCRETE - Installable anywhere in vehicle boot, underseat, behind seat, or foot wells
- SPECIFICATION - Speaker Frequency range 40-150hz, Bass Boost 26db Gain @ 42Hz, Wired Remote Control
- BRITISH DESIGN - Designed in the UK with over 30 years of audio experience
| Audio Output Mode | Stereo |
| Mounting Type | Underseat Mount |
| Enclosure Material | Aluminum/Die Cast Aluminum |
| Speaker Type | Subwoofer |
| Product Features | Built-in Amplifier, Aluminium Coned Subwoofer |
| Antenna Location | Car |
| Colour | USW300 |
| Is Waterproof | false |
| Control Method | Remote |
| Speaker Size | 28 Centimetres |
| Woofer Driver Diameter | 200 Millimetres |
| Tweeter Diameter | 1 Inches (2.5 cm) |
| EU Spare Part Availability Duration | 2 Years |
| Specific Uses For Product | Car |
| Controller Type | Remote Control |
| MP3 player | No |
| Frequency Response | 150 Hz |
| Number of Audio Channels | 2.0 |
| Network Connectivity Technology | Auxiliary |
| Wireless Technology Type | No Wireless Communication Technology |
| Subwoofer Connectivity Technology | Wired |
| Connectivity Protocol | Auxiliary |
| Power Source | Corded Electric |
| Brand Name | In Phase |
| Model Number | USW300 |
| Model Name | USW300 |
| Box Contents | Car Subwoofer Active Enclosure, Wiring Kit, Mounting Brackets, Remote Controller, Instruction Manual |
| Number of Items | 1 |
| Customer Package Type | Standard packaging |
| Global Trade Identification Number | 05060047672757 |
| Manufacturer | In Phase |
| Age Range Description | Adult |
| Item Type Name | Underseat Active Subwoofer |
| Item Dimensions D x W x H | 5D x 16W x 5H centimetres |
| Item Weight | 1.5 Kilograms |
| Maximum Speaker Output Power (in watts) | 300 Watts |
| Input Voltage | 12 Volts |
| Compatible Devices | Car |
| Compatible with Vehicle Type | Car |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 8 Inches (20.3 cm) |
| Brand | In Phase |
| Speaker maximum output power | 300 Watts |
| Connectivity technology | Auxiliary |
| Material | Aluminum/Die Cast Aluminum |
Who Should Buy?
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Compact Car Owners
Ideal for those who want powerful bass in small cars without sacrificing valuable trunk space.
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Bass Enthusiasts
Perfect for users looking to enhance their audio experience with deep bass in their vehicles.
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Easy Upgrades
Suitable for individuals wanting a simple installation process to improve their car’s sound system.
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Large Vehicle Users
Not ideal for owners of larger vehicles needing more powerful and expansive subwoofer systems.
Product Description
About This Item
Introducing the In Phase Car Audio USW300 300W Underseat Ultra Slim Compact Active Subwoofer System, made with a sturdy die-cast aluminum construction. This high-quality subwoofer system is designed to enhance your car audio experience and deliver powerful bass. With its ultra slim and compact design, the USW300 easily fits under your car seat, saving valuable space in your vehicle. Don't let its small size fool you, though – this subwoofer system packs a punch with its 300W power output, allowing you to enjoy deep and rich bass notes. The USW300 is easy to install, making it a great choice for car owners who want to upgrade their audio system without hassle.
It comes with all the necessary wiring, connectors, and mounting accessories, so you can get it up and running in no time. Featuring an active subwoofer design, this system includes an integrated amplifier, eliminating the need for a separate amplifier. This not only simplifies the installation process but also ensures optimal performance and efficiency. Whether you enjoy rock, hip-hop, or any other genre of music, the USW300 delivers accurate and distortion-free bass that enhances the overall listening experience. With its adjustable gain control and low-pass filter, you can fine-tune the sound to suit your preferences. Invest in the In Phase Car Audio USW300 300W Underseat Ultra Slim Compact Active Subwoofer System to take your car audio to the next level.
Upgrade your sound system with this high-quality subwoofer system and enjoy powerful, dynamic bass. Don't settle for mediocre audio – choose the best for your vehicle. Keywords: In Phase Car Audio USW300, USW300 Underseat Ultra Slim, Compact Active Subwoofer System, Underseat Subwoofer System, Ultra Slim Car Subwoofer, Compact Active Subwoofer, Car Audio Subwoofer.
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Customer Questions & Answers
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Question:
How does the In Phase USW 300 compare to the Kenwood KSC-SW11 and the Pioneer TS-W130EA?
Answer: The In Phase USW 300 was designed as direct competition to both subwoofers. -
Question:
What are the standout features of the In Phase USW 300?
Answer: The In Phase USW 300 offers superior structure, cone material, amplification, and robustness. -
Question:
How does the In Phase USW 300 differ from its competitors in terms of responsiveness?
Answer: The In Phase USW 300 outperforms its competitors in terms of its responsiveness to frequency changes and different types of music.
In Phase Enclosed Subwoofer Systems USW300 Editorial Review
In Phase USW300 Underseat Subwoofer | Car Subwoofer with Built in Amplifier | 300W Active Subwoofer Car | Compact Design Under Seat Subwoofer Car | Heavy Duty Durable construction | Designed in the UK; The In Phase USW300 Underseat Subwoofer impresses with its compact design, allowing it to fit neatly under car seats, including those in smaller models like the Smart Fortwo. Users have applauded its ease of installation and effective sound quality, especially when teamed with upgraded factory speakers. One reviewer noted the remote control's accessibility for effortless adjustments, enhancing its convenience while driving. Although it may slightly distort at high volumes, it delivers a solid bass experience, making it an excellent choice for those seeking better sound without sacrificing space.
Customer Reviews & Ratings
438 customers ratings
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5 Star
71%
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4 Star
16%
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3 Star
4%
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2 Star
3%
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1 Star
6%
Review this product
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Pros
- Compact size fits under most car seats
- Built-in amplifier for easier installation
- Remote control for convenient adjustments
- Great sound quality enhances existing speakers
- Durable aluminum construction for longevity
Cons
- May require additional RCA leads for low-level connection
Platform Trust & Buyer Confidence
JK
Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
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Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
AC
Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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TTD 1163
Order now and get it around Monday, September 28
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Features & Benefits
- Direct competition to the Kenwood KSC-SW11 and the Pioneer TS-W130EA.
- Superior structure, cone material, amplification, and robustness.
- Offers SUB Bass and extremely responsive performance.
- Adds a completely different sound to the car.
- Outperforms competitors in terms of responsiveness to frequency changes and music types.
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