EXTRA FLAT • UNDER-SEAT • AMPLIFIED • CAR AUDIO
Extra-flat car subwoofer
deeper bass without cluttering your trunk
Discover our extra-flat subwoofers and compact car
subwoofers. A discreet solution to boost the bass
of your audio system with a subwoofer that, depending on the vehicle,
can be installed under a seat or in a confined space.
EXTRA-FLAT CAR SUBWOOFER
Want more bass without a bulky subwoofer?
The extra-flat subwoofer is designed for
installations where space is limited. Its low height
allows for a much more discreet installation than a traditional subwoofer
and, depending on its dimensions and the vehicle, may allow for installation
under a seat or in a confined area
of the cabin or trunk.
Extra-flat
Low height
Under-seat
Depending on available space
Built-in amplifier
On our active models
Preserves trunk space
Less clutter
COMPACT BUT EFFECTIVE
Add the bass your system is missing
A car's factory speakers often have
limited bass capabilities. An extra-flat subwoofer
can complete the system without turning your trunk
into a bulky car audio installation.
More bass
Boost the low frequencies of your music.
Discreet installation
A format designed for confined spaces.
Everyday use
Enjoy the sound while keeping your vehicle practical.
UNDER-SEAT SUBWOOFER
A discreet solution for your car
The extra-flat format allows some subwoofers to be installed
under the driver or passenger seat when there is sufficient space. It is a particularly interesting solution
for city cars, sedans, station wagons, SUVs, and utility vehicles.
Low footprint
The flat design significantly reduces the height of the subwoofer.
This prevents you from taking up a large part of the trunk
with a traditional speaker.
Discreet installation
Depending on the vehicle, the subwoofer can be installed under a seat,
against a panel, or in another rarely used area.
Always check the dimensions before purchasing.
Enhanced bass
A compact subwoofer allows you to add the low end of the spectrum
that is often missing from factory speakers and small
door speakers.
All-in-one solution
Most models in this category are amplified:
the subwoofer and its amplifier are combined in a single
compact unit.
EXTRA-FLAT AMPLIFIED SUBWOOFER
Subwoofer + amplifier in a single enclosure
An extra-flat active subwoofer has its own built-in amplifier.
Therefore, there is no need to install a separate
monoblock amplifier just for the subwoofer.
However, you will need a properly protected power supply,
a ground, and an audio signal suited to the chosen model.
16 • 20 • 25 CM
Several compact subwoofer sizes
Our selection includes different sizes to meet
installation constraints and the desired level of bass.
Small compact format
The most compact models prioritize
ease of installation above all else. They are ideal when
space under the seat is particularly limited.
Subwoofer 20 cm / 8"
20 cm is very common for under-seat subwoofers.
It offers an interesting compromise between enclosure
dimensions and bass reproduction.
Subwoofer 25 cm / 10"
Some flat subwoofers use a 25 cm speaker
to achieve more diaphragm surface area
while maintaining a low-profile design.
Choose based on space
The largest diameter is not always the best choice.
The priority is to select a model that is truly compatible
with the available space in your vehicle.
FACTORY CAR STEREO • OEM
Add a subwoofer without necessarily changing your car stereo
Many compact amplified subwoofers can be integrated
into a factory audio system. Some have high-level inputs
that allow you to retrieve the signal directly
from the speakers.
Depending on the vehicle and the chosen subwoofer, a high-level input,
speaker-to-RCA converter, or specific interface
may be necessary.
Note: "extra-flat" does not automatically mean
compatible with all seats.
Measure the available length, width, and especially
height precisely. Also check the seat rails,
electrical cables, connectors, ventilation outlets
and the seat's full range of motion before choosing your subwoofer.
BUYER'S GUIDE
How to choose your extra-flat subwoofer?
To get a good result, first choose your subwoofer
based on the available space, then compare
its specifications and connection options.
✓ Height — measure the space under the seat
✓ Length / width — check the total footprint
✓ RMS power — compare the continuous power
✓ High-level input — useful with OEM car stereos
✓ RCA — for compatible installations
✓ Remote control — level adjustment depending on the model
FOR WHICH VEHICLE?
A COMPACT SUBWOOFER FOR ALMOST EVERY TYPE OF CAR
City car, compact, sedan, station wagon, SUV, or utility vehicle:
an extra-flat subwoofer can be an excellent solution
as soon as you want to improve the bass without installing
a large traditional subwoofer.
Small car
A solution suited for interiors where every centimeter counts.
Family car
Keep the trunk available for luggage and groceries.
Utility vehicle
Add bass without unnecessarily sacrificing cargo space.
MUSWAY • GROUND ZERO • FOCAL • JBL • CRUNCH
Brands specializing in car audio
At Sound Auto Concept, find a selection of extra-flat
and amplified subwoofers from brands such as Musway,
Ground Zero Audio, Focal, JBL Car Audio, and Crunch.
Several power levels and dimensions are available to help
you choose a compact subwoofer suited to your vehicle
and your installation.
Should you choose the extra-flat subwoofer with the most watts?
Not necessarily. RMS power is a useful criterion,
but the speaker diameter, its excursion,
the available volume, the subwoofer design, and its location
also influence the result. For an under-seat subwoofer,
compatibility and quality of integration are priorities.
FREQUENTLY ASKED QUESTIONS
FAQ – Extra-flat subwoofer
What is an extra-flat subwoofer?
It is a subwoofer designed with a low height to facilitate
its installation in confined spaces, especially under certain
seats or in compact areas of the vehicle.
Can a subwoofer be installed under a seat?
Yes, if the subwoofer dimensions are compatible with the
available space. Always measure the space before purchasing.
Does an extra-flat subwoofer produce real bass?
Yes. It uses a genuine subwoofer dedicated to low frequencies.
However, its performance depends on its design,
its power, and its installation.
What is the difference between a flat subwoofer and a classic subwoofer?
The flat subwoofer prioritizes a low height and a reduced
footprint. A traditional subwoofer may have a larger internal
volume but generally takes up more space.
Do you need an amplifier for an extra-flat subwoofer?
Active models already have their built-in amplifier.
However, they still require a power supply, a ground
and an audio signal that are properly connected.
Can you keep the factory car stereo?
Yes in many vehicles. A high-level input,
an HP-to-RCA converter, or a specific interface
may be necessary depending on the equipment used.
Which diameter should you choose: 20 cm or 25 cm?
Do not choose based on diameter alone.
First check the external dimensions of the subwoofer
and the space actually available in your vehicle.
Does an under-seat subwoofer replace a large trunk subwoofer?
It serves a different purpose. The extra-flat subwoofer
prioritizes discretion and a small footprint,
while a large trunk subwoofer can be designed
to achieve greater output and bass extension.
How do I know if the subwoofer will fit under my seat?
Measure the available height, width, and length
with the seat in its different positions. Also check
the rails, cables, connectors, and ventilation ducts.