QSC KS212C

Professional Dual 12” Cardioid Subwoofer Rental in Miami

The QSC KS212C is a high-performance powered cardioid subwoofer designed for professional sound reinforcement applications where powerful low-frequency output and precise bass control are essential.

Featuring dual 12-inch long-excursion drivers powered by a 3600W Class-D amplifier, the KS212C delivers deep, impactful bass while its cardioid design significantly reduces unwanted low-frequency energy behind the subwoofer.

Unlike conventional subwoofers that radiate bass in nearly every direction, the KS212C uses QSC’s cardioid technology to focus more low-frequency energy toward the audience while reducing bass behind the cabinet. This makes it an excellent choice for stages, corporate events, weddings, ballrooms, live performances, DJ events, and locations where controlling low-frequency spill is important.

Available for professional event rental from Gear Bros LLC in Miami, Florida.

Key Features

• Dual 12” long-excursion drivers
• 3600W Class-D amplification
• Factory-engineered cardioid configuration
• Up to 132 dB maximum peak SPL
• Significant rear low-frequency rejection
• Powerful and controlled bass response
• Built-in DSP processing
• Adjustable crossover frequency
• Adjustable delay for system alignment
• Save and recall DSP scenes
• Dual XLR/TRS combo inputs
• Dual XLR pass-through outputs
• M20 threaded pole mount
• Heavy-duty professional enclosure
• Integrated casters for transportation

Technical Specifications

System Type: Powered cardioid subwoofer
LF Drivers: 2 × 12” long-excursion woofers
Amplifier: 3600W Class-D
Frequency Response (-6 dB): 44 Hz – 104 Hz
Frequency Range (-10 dB): 39 Hz – 118 Hz
Maximum SPL: 132 dB peak @ 1 meter
Cardioid Rejection: Up to approximately 15 dB rear attenuation
Inputs: 2 × locking XLR / 1/4” TRS combo
Outputs: 2 × XLR pass-through
DSP: Crossover, delay, scene save/recall and system processing
Pole Mount: M20 threaded socket
Power: Universal AC power supply
Dimensions (H × W × D): Approx. 24.5” × 15.5” × 33.5”
Weight: Approx. 88.5 lbs / 40.1 kg

Why Choose the KS212C?

The KS212C is particularly useful when bass direction and control matter.

Traditional subwoofers can send significant low-frequency energy toward the stage and surrounding areas. The KS212C’s integrated cardioid configuration helps reduce that rearward energy without requiring multiple separate subwoofer cabinets and complicated DSP configurations.

This can provide:

• Cleaner sound on stage
• Reduced low-frequency buildup behind the PA
• Better separation between stage and audience sound
• Improved bass control in ballrooms and indoor venues
• Reduced unwanted low-frequency spill
• A compact alternative to building a traditional cardioid subwoofer array

Ideal For

• Corporate events
• Weddings
• DJs
• Live bands
• Conferences
• Ballrooms
• Concerts
• Private events
• AV productions
• Stage productions
• Mobile sound systems
• Events requiring controlled low-frequency coverage

What’s Included

• (1) QSC KS212C Powered Cardioid Subwoofer
• Power cable
• Integrated transport casters

Additional audio cables, speaker poles and accessories can be provided depending on the rental package.

Rental Information

The QSC KS212C is available for rental only through Gear Bros LLC.

Standard rentals are priced per event day. Extended, overnight and multi-day rentals are also available.

Every unit is professionally inspected, cleaned, tested and prepared before each rental.

Delivery, setup, system configuration and professional audio technicians are available for qualifying events.

Complete QSC PA Packages

The KS212C can be paired with our other QSC loudspeakers to create a complete professional PA system, including:

• QSC K12.2
• QSC K10.2
• QSC CP12
• QSC CP8
• QSC KC12
• QSC KS112
• QSC KS118

Multiple speakers and subwoofers can be configured based on your venue size, audience and event requirements.

Need help choosing the right system?

Contact Gear Bros LLC for availability, package recommendations and rental pricing.

Miami, Florida

WhatsApp / Phone: 786-714-5815