(24)

In Phase Car Audio USW300 - 300W Underseat Compact Subwoofer

£89.99 Save £110.00 (55%) was:~~£199.99~~

24 Review(s) / write a review

Quickfind Code - 42186

Quick Summary:

Made from Diecast Aluminium fits snuggly under the seat of any car or in two seaters even behind the seats. Can be mounted inside the boot area also. Has complete control allowing for volume and phase adjustment by rotary hardwired.

Condition: New

£89.99

Save £110.00 (55%)
~~rrp: £199.99~~

Only 2 Left!

Finance Available
On Orders Over £300

We are open online & shipping orders during the COVID-19 pandemic
Free Car Air Freshener with every order
Next Day Delivery available on all orders before 5pm
Easy Returns

Click image to zoom

Key Features

300W Underseat Compact Subwoofer - In Phase Car Audio USW300

The key thing about the In Phase USW 300 is the performance, the little active woofer really packs a punch, the bass response is amazing, you really do get SUB Bass from it. Its extremely responsive so the music has a completely different sound once added to the car. Many people think about changing speakers in you car, my advice is just add the USW 300 and you will think you have new life in your car! Enjoy its an awesome product.

This underseat subwoofer comes with it's own wiring. Please do not use any other kit.

Download image of In Phase Car Audio USW300

Click here for Image of In Phase Car Audio USW300

Technical Specification

Features:

5" x 8" Aluminium Speaker
130w RMS
300w Max Power
Die Cast Aluminium construction
Variable Subwoofer crossover 40-150hz
Speaker Frequency range 40-150hz
Bass Boost 26db Gain @ 42Hz
Bass Boost Frequency
Wired Remote Control
High Level speaker input
Line input
Max Power consumption 10Amp
LED Power Indicator
Super Compact design
W 280mm x H 200mm x D 75mm
Weight 3.7KG

Please wait...

Customer reviews

A great little sub!
Nick Lewis on 04/05/2021 5 star rating

I bought this to replace a failing Vibe Optisound 8A and was looking at the pioneer underseat sub, but then stumbled upon this one. The good reviews and excellent price made me go for it. :-) I'm really impressed. It's half the size of the vibe (so now I have a sub that will actually fit under my seat) and sounds much better. The vibe also used to distort easily at louder volumes which the usw300 handles with ease. This is a fantastic little underseat subwoofer. Thanks, Car Audio Centre. Really quick delivery too. Very happy. :-)

Big Bass
Hayden on 28/04/2021 5 star rating

This is wicked, the bass is very loud and clear.

Very Impressed.
Gem Quinn on 26/04/2021 5 star rating

As a sound engineer/musician, I am fussy about sound. And as it is customary practice, I listen to mixes or masters in the van, on the way somewhere. I was getting tired of not hearing what was going on with the music, as my rear speakers were too far behind me, and my front ones were only really tweeters.. I drive a VW Transporter. I fitted this yesterday, and have covered a fair few miles since then.. I am absolutely thrilled at the amount of control, and quality on offer here. if you need a bass bath, its there, or if you need just to hear the music with all frequencies, it is as good as it will get in a space like that, Fitting was easy, with the supplied manual, and the head unit manual. Hardest part was routing the wires (All fitting wires thankfully included with this beauty). I ended up putting it in the passenger footwell, mounted on a piece of oak, slightly larger than the SW, and velcr-oing that to the floor rubber mat with Gorilla Glue. (careful now).. There are no vibrations, or odd things going on, and my remote is mounted on the dash, to the right of the Head unit, with some black foam double sided tape.. job definitely done, and out of sight, but definitely not out of mind. 10 stars.

View all reviews

Write a review

Questions/Answers About This Product

Question: 26 April 2021
Hi, I have a VW T25 (1988)
I'm want to put a Subwoofer in and am looking at this one.
Does this come with wiring kit?

Answer:
Hi,

Yes this unit comes with a wiring kit

Found Useful? Yes
Question: 24 April 2021
Car: VW Transporter - 2005 >

Will thus fit under the drivers seat in a T5? RCA fitment for a sub on the head unit is this the best option to give some good bass to kenwood door soeakers

Answer:
Hi,

Yes, this will fit under the seat.

Found Useful? Yes
Question: 14 April 2021
Car: Ford Fiesta - 2008>

2014 Fiesta MK7.5 with OE Sony head unit. Which underseat sub is best USW300 or TS-WX130DA? Also how would these connect to the head unit? Is there an adaptor or splice only to speaker cables? Thanks

Answer:
Hi,

The USW300 will be miles better. You can tap into the speaker cables or use a line out converter.

Found Useful? Yes

Question: 09 April 2021
Car: VW Transporter - <2004

Currently running Sony XAV-AX3005DB head unit and your XTC6CX speakers without amp (great btw). Would the USW300 connect to the rca sub outputs on the head unit, or tap into the existing speaker cable

Answer:
Hi,

You will be better off running RCAs instead of using speaker level input.

Found Useful? Yes

Question: 21 March 2021
Car: VW Golf - 2003 > MK5

I have a MK5 golf, would this sub be a direct fit to the head unit or would I need an adapter? Thanks.

Answer:
The USW300 come with all the wires and will fit and work of yoru stock radio.

Found Useful? Yes

Question: 10 March 2021
Car: BMW

Looking to fit this to my E30. I have a Nakamichi CD400 fitted at the moment which has a SW output plug on the back. Do you sell the correct plug and loom to marry the two devices?

Answer:
Yes the In Phase USW300 will fit in yoru BMW E30 and yes it will also work with your CD400 but you will need to buy a RCA cable to connect the headunit to the Underseat woofer.

IP5RBULK Oxygen Free RCA Lead (5 metres)

Found Useful? Yes

Question: 03 March 2021
Car: BMW 3 Series (E46) - 1999-2005 (E46)

I want to fit this under the seat in my Conv E46. It currently has a Sony unit and Pioneer component speakers front & rear replacing the factory ones. What amp can you suggest & what else will I need

Answer:
Hi

The USW300 has a built in amp. You can go for the following amplifier for the speakers.

GM-D1004 - 400W 4 Channel Easy Install Amplifier with TVC concept and input sensor

Found Useful? Yes

Question: 28 February 2021
Hi. Does this sub require a power supply from the car battery. I have a supply to my current mono block amp including RCA but as I need the boot space can the mono block supply connect to this

Answer:
Hi,

This underseat sub will require a 12V power feed regardless of the current system fitted.

Found Useful? Yes

Question: 24 January 2021
Car: Honda Jazz - 2008>

1) if fitting from stock head unit does it take one of the outputs out (like rear speakers) to work.
2) there is another in phase which seems to be similar usw 10.which is better?
Thanks,
Dan

Answer:
Hi,

The USW10 is better but for the price, the USW300 is better value for money.

Yes, I would use a line out converter for better performance. See below

In Phase Speaker to Rca Converter adjustable output gain

Found Useful? Yes

Question: 29 November 2020
Car: Seat Leon - 2007>

I have a 2018 seat leon, was about to purchase this sub. Just wondering if there is any additional wiring I will require to connect this to a standard stereo. Many thanks

Answer:
Hi

The USW300 will come with all the cables required for installation.

Found Useful? Yes

Question: 25 November 2020
Car: Toyota Aygo -

Hello, I was this after looking at the kenwood reviews. Please could I ask would would I need to fit this up to my pioneer stereo. I have a Toyota aygo 2007 and wanted to bring the sound together.

Answer:
Hi,

This will wire straight up to the Pioneer unit.

Found Useful? Yes

Question: 16 November 2020
Car: Mitsubishi Colt - 2004 >

if i run the power wires next to an rca cable will i get interference? will the air vent under the seat make the sub too hot? will velcro be good enough to hold it in place?

Answer:
Hi,

You will get that noise with any amp where the cables run too closely together. Velcro is normally fine for us and I couldn't comment on the air vent as I do not know how hot it gets.

Found Useful? Yes

Question: 29 October 2020
Car: Ford Focus - 2004>

Hi does this have speaker level input and also would it turn on when its got power through the speaker level if it has it to save me connecting it to a ignition on wire

Answer:
The In Phase USW300 does have high level input but you woudl need to wire to the fuse box to ensure it turns off when the car does.

Found Useful? Yes

Question: 21 October 2020
Car: Ford Ranger - 2007>

Can you run more than one of these units of the same oem system?

Answer:
Hi,

Yes, but require professional installation.

Found Useful? Yes

Question: 02 October 2020
Car: Citroen C4 - 2004>

My car is a c4 Picasso 2008 will this fit with stereo sony 8050 thanks Steve

Answer:
Hi Steve

The USW300 can be installed in your Citroen C4 Picasso.

Found Useful? Yes

Got a Question about this Product?

The email address is required to email you when your question has been answered

Name:

Email:

Car Make

Car Model

Question:

chars left

Newsletter sign up

N.B. Questions are answered during office hours
Please don't put sensitive info in the question.

Fitting Services

Need help with Installation?

Here at CarAudioCentre we offer a professional and reputable fitting service in all our stores. For all fitting enquiries and bookings please visit or call one of our nationwide stores. Our fitters can install your new car stereo, DAB radio, audio visual, speakers, subwoofers or amplifier. We can also help to connect your iPod or MP3 player to you existing audio unit and can offer the best advice on the right in-car entertainment for your vehicle, to further this more we also offer a total 100% custom installation service for demo and show vehicles. So if you have an idea come on in and run it past us, the possibilities are endless and we are never too busy for an enthusiastic chat about our favourite subject.

Please note:

"That our two year warranty on products is only applicable to purchases made directly from us and that have been fitted in one of our stores."

Our Stores:

Nottingham:

542 546 Mansfield Road, Sherwood NG5 2FR
Tel: 0115 9624 986

Ilford:

743-745 Eastern Ave, Newbury Park, London, IG2 7RT
Tel: 0208 599 2368

Tooting:

835 Garratt Lane, Tooting, London, SW17 0PG
Tel: 0208 971 9181