🎵 Feel the bass, not the bulk — power your ride with stealth and style!
The In Phase USW300 is a compact, active underseat subwoofer featuring a robust 300W max output and 130W RMS power. Its lightweight yet durable aluminum cone with integrated damping ensures deep, rattle-free bass. Housed in a rigid die-cast aluminum chassis, this subwoofer resists flex and vibration for consistent performance. Designed for discreet installation under seats or in tight vehicle spaces, it includes a built-in amplifier for seamless plug-and-play setup, delivering powerful audio enhancement without sacrificing cabin space.
A**M
Fantastic value for money, easy to install.
+ 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.
L**Y
Amazing Bit of Kit
Fantastic bit of kit for the price,solid in build and design and very simple to fit with clear instructions.Hardest part was tracing the live feed wire from battery to unit.Sound is amazing at all levels with easily adjustable settings.Fits neatly under the seat.Love it
A**.
Great value, this does the job.
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 🎶
M**N
Good quality and easy to install
Absolutely great sub for the price . Nice crisp base and sounds great
T**1
A brilliant sub for a small car.
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.
R**.
Great base sound which is adjustable from a wired fob.
Does exactly what it says it does. Brilliant small item that has a real bass boost.
A**R
Nice deep bass and loud for the price
Very loud and great bass
T**M
They both stopped working within 6 months and cannot use the 1 year warranty
I’ve had two of the same model they have both stopped working within the first 6 months of having them the only reason why I re bought it is because all the wiring was there and I didn’t want to have to redo. It turns on when I put a new fuse in it and continues to blow it. It has a one year warranty but when I contacted the company they told me to return through Amazon however that is not an option I’m very disappointed with the product.
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