Atlantic Technology SB900
Best compact subwoofer for adding deep bass to smaller home theaters.
Elevate your home theater or soundbar experience with this compact powered subwoofer, delivering surprisingly deep and clean bass performance. It features an 8-inch driver and a 125-watt amplifier for robust low-end extension down to 32 Hz. Proprietary distortion-detection circuitry ensures clarity, while adjustable crossover and phase controls allow for seamless system integration. Auto-on signal sensing adds convenience, making this an unobtrusive addition for a more immersive audio experience.
$399.99
Owner Satisfaction
4.4
/ 5
Category Rank
8638
/ 11829
#8638 in Speakers
Price vs Category Average
-77%
Below average
Power Output
125
/ -Watt amplifier
Who it's for
- Home theater enthusiasts seeking precise, accurate front soundstage imaging
- Minimalists wanting a clean, unobtrusive under-TV speaker solution
- Listeners prioritizing long-term durability and reliable, high-volume performance
Who should skip it
- Shoppers avoiding the extra cost and complexity of external amplification
- Users without space or budget for an additional powered subwoofer
- Consumers expecting modern conveniences like streaming or HDMI ARC connectivity
Performance breakdown
Bass Depth
Reaches down to 32 Hz, providing satisfying rumble for most media.
Clarity and Control
Distortion-detection circuitry keeps low-end frequencies tight and remarkably clean.
System Integration
Adjustable crossover and phase controls make blending with speakers effortless.
Compact Footprint
Small enough to tuck away without sacrificing essential sonic impact.
Power Efficiency
The 125-watt amplifier delivers punchy output suitable for medium-sized rooms.
User Convenience
Auto-on signal sensing removes the hassle of manual power management.
Key Specs
Power Output
125-Watt amplifier
Driver Size
8 inches
Frequency Response
32 Hz (-3 dB)
Amplifier Type
High-current, equalized
Controls
Adjustable Crossover and Phase control
Connectivity
Auto-on signal sensing
Included Accessory
Detachable AC power cord
Model Number
SB900
Know before you buy
The SB900 is designed primarily for small to medium-sized rooms. While its 125-watt amplifier and 8-inch driver deliver impressive, clean bass for its size, it is best suited for compact home theater setups or secondary listening areas rather than cavernous open-concept spaces.
Yes, the SB900 is compatible with most soundbars and home theater systems that feature a dedicated subwoofer output. Because it includes adjustable crossover and phase controls, you can fine-tune the integration to ensure the bass blends seamlessly with your existing speakers.
This proprietary technology monitors the audio signal in real-time to prevent the subwoofer from sounding muddy or 'blown out' when playing at higher volumes. It essentially keeps the bass tight and accurate, ensuring that even at louder levels, the output remains clean and controlled.
No, you don't. The SB900 features auto-on signal sensing, which detects when an audio signal is being sent from your receiver or soundbar and powers the unit on automatically. It will also enter a standby mode when it stops receiving a signal, saving energy.
The SB900 offers a frequency response down to 32 Hz. This provides a solid foundation for most music and movie soundtracks, delivering the deep, impactful low-end frequencies that smaller soundbar drivers simply cannot reproduce on their own.
Still have a question?
Ask Hayley anything about this product before you decide.