Limited Space Sacrifice Provides revolutionary performance without bulky equipment overtaking usable trunk space.	Super Fast Mounting and Removal Using BSW's unique QuickRelease mounting system, you can mount OR remove the entire enclosure assembly in around 5min -- so you have access to ALL your trunk space when you need it.
Tight, Articulate Bass Single 10" rigid aluminum subwoofer virtually eliminates distortion yielding accuracy, realism, and musical reproduction that is unprecedented from an automotive subwoofer system.	Astonishing, Authoritative Output Combines extremely efficient subwoofer design with stout amplification. Result: a deep, astounding bass foundation that extends effortlessly to frequencies most subs never reach.
True Fidelity State of the art amplification and signal chain insures totally transparent link from source unit to subwoofer for unmatched purity, precision, clarity, and openness.	Rattles? What Rattles? Utilization of pre-existing mounting holes and vehicle specific bracket design for a direct subwoofer to chassis mount significantly reduces the chance of rattles.
Extremely Low Weight Just 30.55lbs for the entire system, so your BMW handles just like it should.	Do-It-Yourself Installation Includes step-by-step instructions with photos. Requires only 7 wire connections. An afternoon with your BMW and basic tools is all you'll need.
100% Complete System Includes absolutely everything you need: amp, subwoofer, installation hardware, wiring. Just buy and install.	Performance Guaranteed Unconditionally guaranteed to exceed all your expectations or your money back. You get 30 days to try our products, and if you're not totally happy, send them back for a refund.

the how and why of bass in your BMW

Fully 1/3rd of all recorded music is below 80Hz (this is called bass!) Almost no interior component speaker can reproduce sound below 80Hz without high levels of distortion (some CAN reach to around 60Hz, but that's really the lower limit). The cheap paper drivers BMW uses in their audio systems are no certainly no exception to this rule.

Why? High output bass production requires that a speaker physically moves a great deal of air relative to what's required for higher frequencies. This air movement is accomplished in either or both of the following two ways:

• High Excursion: Excursion refers to how far a speaker can move in or out from its resting state. The smaller the speaker, the larger the amount of excursion required to produce bass output -- and vice versa. However, a small driver with high excursion is far less efficient than a larger driver with lower excursion (this means it would require TONS of power from the amplifier) and is very impractical in a car audio situation due to the space required in front of such a driver to accomodate the movement. (It's also difficult to design a very high excursion driver that remains accurate at the limits of its movement).
  
  
• Large Cone Surface: As the cone surface area of a speaker increases, the more air the driver can move -- and the more efficient a driver becomes relative to a speaker with smaller cone surface area. However, the additional mass of such a driver requires more power and a more stout motor structure (the components that control the speakers) to keep the driver controlled and accurate.

Both solutions do require substantial power output from the amplifier driving them, but power can be expensive. For cost savings reasons, manufacturers will produce a larger coned driver out of lightweight material (i.e. paper) to minimize power requirements. Unfortunately, the resulting lightweight subwoofer is flimsy, and when combined with low power yields muddy, fuzzy bass at moderate volumes and distortion at high volumes. This is PRECISELY the case in BMW's premium systems equipped with a subwoofer.

And if you don't have the premium system, because your stock amp and speakers (and even high quality component speakers and an aftermarket amp) are small in size, share the same lightweight construction, and are low in power, you'll get the same fuzzy bass, just less of it.

And so, an effective, high power subwoofer solution is needed. With the BSW d110.e36, it doesn't have to come with sacrifices.

absolutely everything you need is included!

The BSW d110 subwoofer system is a 100% complete kit. All you need is basic tools!

BSW d110 Subwoofer Enclosure & Mounting Hardware	BSW by Alumapro 10" Alusonic EX Aluminum Cone Subwoofer
Integrated BSW 300W Amplifier (300W @ 4 Ohms)	All required installation hardware, wiring, and accessories
Detailed step-by-step instructions with photos	BSW 100 % Performance Guarantee Unconditionally guaranteed to exceed all your expectations or your money back.

Is this EVERYTHING I need?

Yes, we include absolutely every single component you need! There is absolutely nothing else you need to purchase outside of the BSW d110 Subwoofer System to install and enjoy our system (except basic tools for installation - see downloadable instructions for more info).

Can I install the d110 Subwoofer System in my BMW myself?

Yes, you can! Every BSW d110 Subwoofer System comes with extremely detailed installation instructions with photos and provide telephone support for the process as well. Because it's a simple installation (you're basically just tapping one audio signal and getting power from the battery - that's it!) with only the most basic of skills required, you can probably do it.

However, if you feel unsure, we always recommend professional installation. Fortunately, because the installation instructions are so good and everything you need is included, if you don't feel comfortable with the installation process, any decent car audio shop can perform the installation for you without any difficulty whatsoever - probably for about $150.

Will this work with my Standard or Harman-Kardon equipped 3 Series / M3? Will it make a big difference?

Yes, absolutely! In your BMW's audio system, even the Harman-Kardon systems, bass response is terrible. Because our d110 Subwoofer System provides as little or as much additional bass response as you want, you'll see a VERY nice improvement in sound quality and low-end frequency response in your BMW, regardless of whether you have the most basic BMW audio system or the nicest.

My trunk is completely sealed. Will I really be able to hear the bass in the cabin?

Yes, definitely. Because we specialize in BMW's, we understand that the trunk areas are very frequently 100% sealed from the interior of the car, and as a result, this important consideration was taken in mind during every step of the design process. This means that our d110 Subwoofer Systems are high-output and will absolutely produce enough output (volume) to really hear, feel, and truly enjoy!

What components are included in your d110 Subwoofer System?

Click the "What's Included" tab above for an itemized list of the components used in this subwoofer system.

Do I need to replace my factory amplifier or head unit?

No, you don't. We include a new amplifier to power the subwoofer included in the d110 Subwoofer System. If you have your factory head unit, we also include all the necessary wiring you need to integrate this system with your factory head unit. This system also works with all aftermarket head units as well!

Will the d110 Subwoofer System be visible from within the car or require any permanent modifications?

No, our d110 Sub System is completely invisible within the car. Only you and your fellow listeners will know that you've upgraded your stereo since your car will maintain a 100% factory appearance within the vehicle. And in the trunk, because the BSW d110 Subwoofer Enclosure used has a stealth, clean look, it's hard to tell there's a sub system in your trunk, either!

Does the BSW d110 Subwoofer System fit with a strut brace?

We have confirmed fitment in a 92-99 BMW 3 Series Coupe with a Dinan strut brace. It is very likely that all other varieties of strut brace for the same vehicle will fit with this enclosure.

Does the BSW d110 Subwoofer System come with a warranty?

Yes, it sure does! The warranty is 1 year, parts only, on all components of the d110 Subwoofer System. If you ever have any issues, we're just a phone call away. Please note that this warranty does not cover subwoofers blown due to abuse.

Any other questions? Just contact us!