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

+ 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.

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

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 🎶

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!

Really good bit of kit, made a huge difference to the bass! Well worth 100 bucks

This little sun-woofer is just excellent for what I need it for , car came with very standard sound system with no bass at all in the speakers , friend told me about this active sub woofer so I got one , easy to instal if your familiar with cars and electrics , it’s perfect for what I need it for .. I couldn’t put mine under the seat so wired it to the boot area and it still works perfectly.. bass is local and loud enough for my use

Really good, massively improved sound system

Some months ago I bought the 8" subwoofer. It was great so I decided to get a second for another vehicle. The listing now also included a 10" subwoofer so I bought that one instead. Sadly it is not up to the standard of the 8" one. It rattles badly at a reasonanble volume and only really plays one bass note. The build quality is also inferior to the 8" one. I can't recommend it. I'd have returned it if I'd not paid to have it installed, which involved the wires being cut, making it unreturnable. Buy the 8" one. It is built much more sturdily, does not rattle and plays a range of notes.

Ancora da montare ma sembra solido

Moin Ich Fahre eine alten Ford Maverick, mit einer Standard Anlage von Werk aus. Wo bei der Bass kaum bis gar nicht vorhanden ist. Verbaut habe ich so ein Standard China Android Radio (Nachgerüstet). Zum Subwoofer: Lieferumfang: Gut verpackt, Anleitung auf Englisch (gut verständlich), Alle Kabel die gebraucht werden sowie Befestigung für den Sub selbst damit dieser nicht im Auto herum rutscht. Qualität: Die Qualität ist echt sehr Positive, komplett aus Metall und sehr Robust und Schwer. Installation: Da ich ein modernes Radio verbaut habe, ist der Anschluss sehr licht gewesen. - Auto Batterie abklammern, Kabel von der Batterie in den Innenraum des Fahrzeuges (bei mir der Beifahrer sitz). (Achtung Sicherung zwischen das Kabel mit 10 AH setzen) -Vom Radio (z.b wie bei mir Cinch Rot Cinch Weis) bis unter den Sitz verlegen, mit dem Sub verbinden. - Trigger Kabel von dem Sub zum Radio (ein kleines dünnes Kabel) damit der Sub weiß wann er aus gehen und angehen soll. Sonnst ist am nächsten morgen der Karren alle. Sound: Geil :) Also für den Preis jo gerne wieder. Ein bisschen mit dem einstellen herumspielen und es Wummst ordentlich, ja natürlich nicht wie ein großer aber für die Größe macht auch Techno schon bock. Was ihr noch Braucht: weil die mitgelieferten Kabel zu kurz sind. Strom Kabel ca. 3-4 m (habe eins aus dem Baumarkt) Cinch Verlängerung ca 1-2m Sicherung 10Ah Sehr weiter zu empfehlen.

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.

Installé entre les deux sièges d'une Daihatsu Copen, il n'est pas très performant mais ajoute un petit plus, par contre il sature très vite si on lui demande beaucoup. Par contre je pense qu'il serait beaucoup trop léger dans un coffre ou dans une voiture trop grosse, déjà dans la Copen qui est minuscule je trouve qu'il est presque parfait mais un peu de manque de puissance mais dans une trop grosse ça n'irait pas. à réserver uniquement pour les petits véhicules