Atlantic Technology SB-900-DF
Best sound upgrade for TV viewers wanting clear audio and sleek design.
The Atlantic Technology SB-900-DF is a compact, down-firing 8-inch powered subwoofer designed to enhance any home theater or music system. It features a ported bass-alignment for superior low-frequency extension and a high-current amplifier delivering 125W RMS for ample headroom and output. Atlantic's exclusive Clear Filter Technology (CFT) ensures clean, articulate performance by minimizing enclosure-induced sound distortion. This subwoofer offers convenient high- and low-level inputs and outputs, an absolute phase invert switch, and auto signal sensing for easy integration and placement.
$330.00
Owner Satisfaction
4.4
/ 5
Category Rank
8638
/ 11829
#8638 in Speakers
Price vs Category Average
-81%
Below average
Model
900
/ SB--DF
Who it's for
- Viewers struggling to hear conversations on their television
- Consumers seeking improved TV audio and bass without clutter
- Homeowners prioritizing minimalist design and easy installation
Who should skip it
- Audiophiles desiring authentic, room-filling cinematic surround experiences
- Bass enthusiasts expecting powerful, rumbling low-frequency effects
- Users with multiple legacy devices needing diverse input choices
Performance breakdown
Low-frequency extension
Reaches down to 32Hz, providing solid foundation for most home theaters.
Sonic clarity
Clear Filter Technology effectively minimizes distortion for a tighter, cleaner sound.
Placement versatility
Compact footprint and down-firing design make it easy to tuck away.
Output headroom
The 125W amplifier handles moderate rooms with ease but lacks massive punch.
Integration ease
Auto-sensing and flexible input options simplify setup with any existing system.
Build integrity
Sturdy construction and quality components ensure long-term reliability and performance.
Key Specs
Model
SB-900-DF
Type/Features
Powered subwoofer, ported enclosure, 1.5-inch vented aluminum voice coil, vented motor
Crossover
Continuous 40–220Hz, 18dB/octave low pass output
Inputs/Outputs
Low- and high (spkr)-level stereo inputs and low- and high-level outputs
Phase
Absolute phase invert switch
Signal Sensing
Auto signal sensing
Bass Driver
8” (203mm) long-throw composite cone
Output Power
125W RMS
Know before you buy
A down-firing subwoofer directs sound energy toward the floor, which helps disperse bass more evenly throughout the room. This design is particularly effective for smaller spaces or rooms where you want to minimize the visual footprint of the speaker while still achieving deep, room-filling low frequencies.
Yes, the SB-900-DF is designed for broad compatibility. It features both high-level (speaker wire) and low-level (RCA) inputs, allowing you to connect it to almost any home theater receiver or integrated amplifier, regardless of whether it has a dedicated subwoofer output.
Clear Filter Technology is an Atlantic Technology innovation designed to minimize distortion caused by the subwoofer's enclosure. By cleaning up the signal, it ensures the bass sounds tighter and more articulate, rather than muddy or boomy.
Yes, it includes auto signal sensing. This means the subwoofer will automatically wake up when it detects an audio signal and enter a power-saving standby mode when the system is not in use, so you don't have to worry about turning it on and off manually.
The SB-900-DF features a continuous crossover dial ranging from 40Hz to 220Hz. You can adjust this to determine where your main speakers stop playing bass and the subwoofer takes over, ensuring a seamless transition between the two.
The SB-900-DF is rated for a peak output of 103dB in a 1,500 cubic foot space, making it ideal for small to medium-sized rooms. If you have a very large, open-concept living area, you may find it better suited for near-field listening or as a secondary sub.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$330