Description

DEMO UNIT: QSC KC12 "K Column" 3-Way Active Column PA System

Condition: Like-New. Used only once for a professional demonstration.

This is your opportunity to own QSC's groundbreaking "K Column" PA system at an incredible value. This specific KC12 was unboxed brand-new for the speaker shootout at the DJs Assemble conference in October 2025.

It was demonstrated once by NLFX Professional's Ben Stowe and Lou Paris, then meticulously re-packed. It is in pristine, "like-new" condition and ready to deliver massive sound for your next gig.

The "K Column": A True 3-Way Powerhouse

Building on the legacy of the World of K® portfolio, the KC12 is a 3,000-watt, 3-way loudspeaker system that surpasses the acoustic performance of conventional column designs. Simple and rapid to deploy, the elegant KC12 is ideal for solo entertainers, musicians, mobile DJs, and AV productions.

Key Features:

True 3-Way Design: Features a 12" subwoofer, two high-excursion 4" midrange drivers, and a 1" HF compression driver for unparalleled vocal clarity and full-range sound.
Massive 132 dB Max SPL: From a powerful 3000W (Peak) Class-D amplifier with Power Factor Correction.
Ultra-Wide 145° Coverage: The innovative QSC LEAF™ (Length-Equalized Acoustic Flare) waveguide provides defined, uniform sound across the entire room.
Versatile 3-Channel Mixer: Two combo inputs (one with Mic/Line/Hi-Z, one with Mic/Line/+48V) plus a 3.5mm stereo input.
Advanced Onboard DSP: A multi-function display gives you control over Global PEQ, Subwoofer level, Presets, Scenes, a 200ms Delay, and Reverb.
Bluetooth® 5.0 with TWS: Stream audio and pair two speakers for a True Wireless Stereo setup.
Flexible Deployment: Configure with or without the column pole to suit any environment, from stages to risers.
6-Year Extended Warranty: Includes QSC's industry-best global warranty with product registration.

Groundbreaking 3-Way Performance

The KC12's groundbreaking 3-way design provides a stunning full-range horizontal coverage of 145 degrees. The ported 12-inch subwoofer extends down to a solid 40 Hz, while the dedicated midrange drivers and LEAF™ waveguide deliver clean, natural sound at all output levels.

Built-in Mixer with Effects

Perfect for solo performers, the onboard mixer features two combo XLR inputs with assignable Factory Presets. Input A can be set to Hi-Z for an instrument, and Input B provides +48V phantom power for condenser mics. You can even add Reverb or a Delay (up to 200ms) right from the speaker's back panel.

What's Included:

KC12S 12" Active Subwoofer
KC12T 3-Way Column Loudspeaker Top
KC-SP32 32-inch Column System Pole
KC12 TOTE: Padded tote for transporting the KC12T column and KC-SP32 pole.

Full Technical Specifications

System:

Configuration: Active 3-Way Column Loudspeaker
LF Transducer: 12-inch (305 mm), cone
MF Transducer: 2 x 4-inch (102 mm), cone
HF Transducer: 1-inch (25.4 mm), compression driver
Frequency Range (-10 dB): 40 Hz - 20 kHz
Nominal Coverage Angle: 145° H x 35° V
Maximum Rated SPL (peak): 132 dB @ 1 m

Amplifier:

Amplification (peak): Class D, 3000 W (Sub: 2000 W, Mid/HF: 1000 W)
Cooling: Low noise, variable speed fan
AC Power Input: Universal, 100-240 VAC, 50/60 Hz

Controls & Connectors:

Controls: 1 x Rotary encoder, 2 x Push buttons, 3 x Level potentiometers
Display: Monochrome LCD (1.75 x 1 inch)
Connectors:
- 2 × locking XLR/F ¼ inch combo (Mic/Line/Hi-Z and Mic/Line/+48V)
- 2 × XLR/M (1 x Loop-thru / 1 x Mix Output)
- 1 × 3.5 mm TRS (Stereo Input)
- 1 x USB-C (Output: 5V/3A)
- 1 × locking IEC power connector