QSC
QSC KS212C
Best compact subwoofer for professional venues needing focused, high-impact bass.
Experience powerful low-frequency sound with the QSC KS212C, an Active Cardioid Subwoofer designed for robust performance in a compact form. Its bandpass construction, featuring two 12-inch woofers and efficient Class D amplification, delivers impressive SPL for its size. Built for convenience, it includes integrated casters and handles for easy transport, plus M20 mounts for secure pole placement. This subwoofer is an excellent choice for installations requiring significant bass output where space is a constraint, such as under stages, offering professional-grade reliability.
$1939.00
Owner Satisfaction
4.7
/ 5
Category Rank
348
/ 6561
#348 in Speakers
Price vs Category Average
+32%
Above average
Drivers
212
/ x " woofers
Who it's for
- Performers needing clean stage sound without feedback issues
- Pro audio users wanting massive bass in compact spaces
- Mobile DJs and touring pros prioritizing easy transport
Who should skip it
- Budget-conscious buyers seeking standard subwoofer performance
- Solo operators who struggle with heavy lifting
- Sound engineers working in cramped or unconventional venues
Performance breakdown
Directional Bass Control
Cardioid design effectively minimizes rear-stage energy for cleaner, focused low-end output.
Output Efficiency
Bandpass architecture maximizes decibel levels from a surprisingly compact dual-driver footprint.
Portability
Integrated casters and ergonomic handles make moving this heavy unit remarkably manageable.
Low-Frequency Extension
Delivers punchy, authoritative sub-bass that holds its own in professional environments.
Build Durability
Rugged wood construction ensures long-term reliability for demanding touring and installation use.
Setup Versatility
M20 mounts and adjustable DSP offer precise integration for diverse venue layouts.
Key Specs
Drivers
2x 12" woofers
Amplifier Power
1800 W (Manufacturer Specs)
Max SPL
132 dB
Frequency Range
39 - 118 Hz (-10 dB)
Connectivity
XLR combo jack (Input), XLR (Output)
Dimensions
622 x 394 x 851 mm (H x W x D)
Weight
40.1 kg
Housing Material
Wood
Features
- Active Cardioid Subwoofer design for focused bass
- Bandpass construction for maximum output efficiency
- Dual 12-inch woofers for deep, impactful lows
- Class D amplifier for efficient power delivery
- Integrated casters and handles for easy portability
- M20 threaded pole mounts for secure speaker setup
- Adjustable DSP settings for sound customization
- Compact footprint ideal for space-limited venues
What customers say
The QSC KS212C earns high praise for its innovative dual 12-inch driver cardioid design, focusing powerful low-end exactly where needed. Users consistently report that this directional control is a game changer, significantly minimizing unwanted bass energy on stage and in adjacent areas. Professionals love the tight, punchy, and musical bass response, noting its seamless integration with existing speaker systems. While it represents a premium investment, reviewers agree that the specialized performance, robust build quality, and reliability fully justify the cost. This subwoofer is viewed as an essential professional tool delivering unmatched precision and control.
Know before you buy
The cardioid design focuses low-frequency energy toward the audience while significantly reducing the amount of bass spilling onto the stage. This helps keep your stage mix clean and prevents unwanted low-end buildup behind the speakers.
Yes, the KS212C features an M20 threaded pole mount. This ensures a secure, wobble-free connection for your top speakers compared to standard non-threaded mounts.
Absolutely. Its compact footprint and bandpass design allow it to deliver high-output bass without taking up the floor space required by traditional, larger dual-18-inch subwoofers.
While the unit weighs 88.39 pounds, it comes with integrated heavy-duty casters and ergonomic handles. These features make it manageable for a single person to transport across flat surfaces.
Yes, the onboard DSP provides adjustable settings that allow you to optimize the subwoofer's performance for your specific room or application. You can easily tweak the output to suit different acoustic environments.
The KS212C uses standard XLR combo jacks for inputs, making it compatible with most professional mixing consoles and audio interfaces. It also includes XLR outputs for daisy-chaining to additional speakers.
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