Double the bass. Don't just listen to your music. Feel it
2X THE BASS - Our woofers are 10 dB+ louder at from 20Hz to 60Hz vs factory woofers, resulting in twice the loudness in this critical “sub-bass” range (and over 8x the sonic energy). You won’t just hear the bass; you’ll feel it.
NEARLY FLAT FREQUENCY RESPONSE FOR EXCEPTIONAL LINEARITY in the key sub / mid-bass frequency range from 40Hz to 200Hz (+ or - 3 dB). Because tons of output is useless without balance and control.
100 day in-car trial, free returns
Install, audition, and fully experience your new audio gear -- if you don't love it, we'll cover return shipping and give you a full refund (U.S. Customers only).
100% Plug & Play
Installs and fits just like your factory BMW woofers, right down to the bolts and factory style plug. (NOTE: Vehicles with “Base” audio systems require slight modification to factory enclosure that add mere minutes to installation)
Simple , do-it-yourself installation
Takes less than 90 minutes and only basic tools, even for a total novice. No complex wiring or additional hardware or installation is required. Simply unbolt your front seats, remove the woofer covers, unbolt your factory woofers, and install ours. That's it!
Use your factory amplifier and get exceptional bass response
We utilize your factory amplifier to generate amazing bass response in your BMW. To do so, we've designed our woofers using technologies like oversized neodymium magnets and lightweight poly cone to maximize every watt of power they generate and translate that into raw output. That means amazing bass response without replacing your amplifier.
Super tight, punchy midbass
Your factory underseat woofers aren't just subwoofers; they're midbass drivers. That means they play not just the lowest frequencies, but also "punchy" midbass frequencies like snare drums and high bass guitar notes.
Unlike our woofers, which are designed to outperform the factory woofers for both subwoofer and midbass frequencies, other underseat subwoofer upgrades on the market are only capable of playing sub frequencies, not midbass, so you miss a huge portion of the frequency range.
Perfectly matched to our legendary stage one speaker upgrade kit
Amazing bass response can transform your listening experience, but if you want the absolute best, overall sound quality and clarity matters too.
That's why we engineered the Ghost Underseat Subwoofer Upgrade System to perfectly and seamless match our legendary Stage One Speaker Upgrade Kit.
4 years warranty our products are bulletproof so is warranty.
Everything we sell has been engineered for durability and longevity, and we know what we sell will last. And last. And last. That’s why our speaker upgrades and subwoofer systems are backed with our industry leading 4 year limited warranty. So if something breaks, send it back. We’ll replace it at no charge.
Factory matched impedance
Depending on your audio system, your factory BMW woofers come in 2, 4, or 8 Ohm impedance. Our woofers are matched to the impedance of your factory woofers (we have different versions for each) to maximize performance and ensure the longevity of your factory amplifier.
Upgradeable design with 100W RMS / 200W peak power handling per woofer
Even though our woofers are designed to be extremely efficient to maximize the output of your factory amplifier, they're also built for upgradability, you can power them with an aftermarket amplifier of your choice up to 100W per channel.
Translation? If you'd like to melt your face off with absurd quantities of bass, you can -- just add an amp.
Featured reviews of the Ghost Underseat Subwoofer Upgrade
If I were any happier I'd be twin Bavsound subs.
These work wonderfully
How it works
How do we deliver bass that's louder, cleaner, and tighter, all without changing the factory amplifier?
In a word, efficiency. Every watt of power generated by your factory amplifier yields far more bass output with our woofers. So even without changing your factory amp, you get breathtaking bass response.
(With your factory woofers, your amplifier is like a 200hp motor in a Camry.With ours, it’s like the same 200hp motor in a Lotus Elise)
Remove your factory underseat subwoofers
Swap your factory woofers with ours, which are 100% plug and play (don't need to change ANY other component in the car)
Enjoy louder, tighter, punchier bass response - without changing any other component