USW300 300W Underseat Subwoofer - Active Car Subwoofer with Built-in Amplifier

Great sound, full kit included for install, you might want to watch a few YouTube videos on how to install. Fits under the passenger seat so perfect size, 10/10 and glad I went with the British design over my usual choice of Pioneer for anything sound

I was a little sceptical before ordering and was considering building something to go under the floor in my SLK. However I purchased one to try and was not disappointed. I fitted under the floor in the passenger side footwell on an SLK, some models have an amp fitted there. At the same time I replaced the headunit with a powered android type with CarPlay. Fitting was easy as the Android head had cables to connect to and a sub output. The remote was remotes to the side of the centre console, convenient for adjustments should I need to. Build quality is good, sound quality is excellent for a compact sub of its size it compliments the rest of the speaker system. It was actually worth spending the money on this product, if you can’t get a big box in anywhere this is the ideal choice and with the remote just adds to the functionality, to be fair I’ve not had the need to alter it from the initial twiddling. I’ve written this after purchasing in August 2024, just in Dec 2025 now and still enjoying the sub!

For the price I can't complain. This does the job if you want to add a little low end and space is limited. It's not too difficult to install if you understand basic wiring. The sound quality isn't audiophile but it will improve any standard set up that lacks the low end. It has an adjustable crossover and gain controls on the unit itself, and an additional remote volume control. What's more it fits neatly under most car seats. You don't need to buy any additional equipment to get this going, all the wiring is also provided. Ok so maybe the bass isn't very tight, it's not going to compare to a 12 inch sub box booming insane levels of bass in your boot but it's an underseat space saving 6" woofer with a built-in amp (active) for less than £150, it is a massive improvement to standard car speakers. Personally I dial the crossover from my head unit (car stereo) as it has a sub out, this will give better results but you can use your factory stereo and wire in using the speaker connections on the back. It's never going to compete with a proper sub but it's nice and compact and provides the extra bass I was missing without breaking the bank. Edit: I've been using this unit for a while now and no complaints. I actually take the longer way home so I can enjoy the music 🎶

+ Great Sound, Great Quality, Easy to Install, Fantastic Value. - No RCA Leads. This is a great little sub if you’re after a fuller sound for your car. I installed a set of component speakers into a Kangoo van and was disappointed with the bass, so I fitted this and it’s made a massive difference! It’s a substantial well built item and has all the sound controls on the remote instead of fiddly dials on the back of the unit which makes it great to tune while it’s situ without messing around accessing it again. It comes with all the leads you need to get it running via high level input, but you will need to but a phono lead if you want to connect it via low level RCA.

Prompt delivery. Item as described. Good bass depth and enough for my requirements

This sub is incredibly solidly built, the case being die-cast aluminium. It easily slipped under the passenger seat of my son’s Aygo (mk1), and held in place ok with some Velcro pads (not supplied) rather than trying to screw it down. The kit is complete with cables for many different types of installation and the instructions are very clear. We did have one installation issue that arose because we also changed out the Argo’s old CD player head unit for a more modern Pioneer one with bluetooth hands-free; The adapter that came with the radio had to have its yellow (permanent 12v) and red (switched 12v) cables crossed over as the subwoofer was not powering up correctly (and yes, the blue/white remote device wire was correctly installed!). After this, it was plain sailing to hide the wires under the central console without having to remove any seats for access. The result is a stereo with MUCH better bass that’s audible at even motorway cruising speeds. A very simple and very useful upgrade to the Aygo.

Complete rubbish - 2 months in and completely no life. Ran it on 75% gain (any less and you may as well not have it at all). Wiring all perfect, immediately worked with a 2nd hand active sub I picked up 2nd hand. Performance is sub-adequate all things considered. Anything without a box for the air to move won't give you much at all. Returned under the UK consumer act.

Like most that wanted an underseat sub, I didn't want the windows to rattle out nor did I want a massive install - I wanted something with a little punch that was discreet. This does both to perfection. It has a very compact footprint meaning it fits practically anywhere you want and is a pretty heavy duty product with a robust case / grille. It's all black and looks sleek. The unit comes with two methods to connect to your stereo - one via RCA and one via speaker outputs - but it's worth nothing that whilst it does come with cables, you will still need to purchase a separate RCA lead to bridge the gap from your stereo to the included cables. Not a big deal, but worth noting. The remote it comes with is super useful - and here is my only minor gripe... it's massive. I think a little more design consideration could have been given to this so again it fits the discreet vibe - BUT - the unit is sub £100 so can't really complain too much!! Overall, I would say this is a fantastic product offering great value for money - especially when you get it on a sale for £75! Buy with confidence.

Ancora da montare ma sembra solido

Bei meinem Wohnmobil (VW Crafter) ist der Sound bisher, trotz neuen Türlautsprechern mehr schlecht als recht. Der Subwoofer den ich im Sitzkasten des Beifahrersitz montiert habe, verbessert den Klang um welten. Es kommt mit ein paar Anpassungen mit Hilfe der Reglereinstellungen des Subwoofer und am Radiogerät selbst zu einem deutlich besseren Klangbild, und zwar nicht nur im Bassbereich. Man hat den Eindruck das auch aus den anderen Lautsprechern ein besserer Sound raus kommt, was natürlich nur eine Empfindung ist. Für Bassjunkies mag dies vielleicht nicht ausreichend sein, für mich ist der Einbau des Subwoofer aber ein deutliche Verbesserung. Der Anschluß geht auch recht schnell von der Hand, gut ist natürlich wenn Stromversorgung in der Nähe ist und die Steuerleitung und ein Cinchkabel vom Radio in der Nähe griffbereit ist, was bei mir der Fall war, so hat der Einbau ein knappe Stunde gedauert. Ein sehr gutes Preis-Leistungsverhältnis, wie ich finde.

Pues está perfecto 💯 para un acompañante del Audio tan poco Bajos... Yo con un aparato de chino Aliexpress ... Me va genial ... El cable amarillo a la batería es lo que cuesta pasar pero eso cada coche .... Yo demás fácil... Contento para lo que es y llegó rápido a Canarias

Super kit très puissant malgré sa petite taille. En tout cas ça rentre parfaitement sous le siège. J'ai été surpris par tout le contenu malgré le petit prix, vous avez absolument tous les fils pour l'installer ( sauf les RCA si vous voulez l'installer avec la sortie sub du poste. Il ne reste plus qu'à voir la durée dans le temps

Installation du caisson dans un cabriolet. Se place parfaitement sous le siège. Très bon rendu de son. Les basses sont très profondes. L’audio du véhicule est nettement amélioré avec ce subwoofer. Toute la connectique est livrée. L’installation est facile. Le réglage du volume est pratique avec la télécommande filaire. Construction robuste. Je voulais acheter un sub Focal Ibus , plus cher et plus encombrant. Il n’aurait pas tenu sous le siège. Le modèle in phase est plus compact, moins cher et done vraiment de bonnes basses. Je suis très satisfait de cet achat.