QSC KS112 Active 12in Subwoofer - Ultra-Compact Bandpass Sub

Our review of the QSC KS112 finds an ultra-compact active 12in subwoofer that suits installers and mobile entertainers who need deep low end from a small footprint. The single biggest reason to buy is the combination of a 12in bandpass cabinet and a 2000 watt peak Class D amplifier module that deliver surprising punch for venues where space and portability matter. This is a practical, professionally finished unit built from premium birch with casters and threaded pole receptacles for reliable deployment.

Key Features

• Ultra-compact bandpass design: The single 12in driver in a bandpass cabinet delivers focused low-frequency output while keeping the cabinet footprint small for tight stages or installs.
• Powerful Class D amplifier: The integrated 2000 watt peak power module supplies headroom and transient punch without adding external amplification to the signal chain.
• Durable birch construction: A premium birch cabinet provides long-term durability for repeated transport and installed applications.
• Versatile mounting options: Two M20 threaded pole receptacles allow wobble-free vertical or horizontal pole deployment for flexible stage setups.
• Intrinsic Correction tuning: Built-in loudspeaker management simplifies system tuning and helps maintain consistent sound across venues.
• Optional security cover: The KS-LOC accessory prevents unauthorized access to controls in fixed installations where tampering is a concern.

Who It's For

The KS112 is aimed at gigging musicians, mobile DJs and AV professionals who need a portable subwoofer that still sounds authoritative. Installers working in bars, houses of worship or corporate AV will appreciate the compact footprint, birch cabinet and thread-mounted pole support for tidy, secure setups.

Those who need very low extension below what a single 12in bandpass can offer or who require an ultra-lightweight plastic enclosure for flyable arrays may want to consider larger-format subs or alternatives. The KS112 shines where portability, build quality and practical power are priorities.

Pros & Cons

Pros

• Compact bandpass form factor provides solid low-frequency presence without a large cabinet.
• Integrated 2000 watt peak Class D amplifier gives ample headroom without external amps.
• Premium birch construction and low-noise casters make it durable and transport-friendly.
• Threaded M20 pole receptacles ensure a secure, wobble-free mounting option.

Cons

• As a single 12in bandpass sub, it offers less extreme low-frequency extension than larger subs.
• Pole not included, so users must supply a compatible threaded speaker pole for elevated deployments.

Specifications

Our Verdict

The QSC KS112 is a well-engineered, ultra-compact subwoofer that balances portability and professional performance. For installers and mobile entertainers who need reliable low end from a small cabinet, its birch construction, integrated Class D power and intrinsic tuning deliver strong value. Buyers seeking the deepest bass at the lowest frequencies may prefer larger subs, but for tight spaces the KS112 is an excellent, practical choice.

Frequently Asked Questions

Does the KS112 require an external amplifier?
The KS112 is an active subwoofer with an integrated Class D amplifier module, so no external amplifier is required.

Can it be pole-mounted?
Yes, it has two M20 threaded pole receptacles for secure vertical or horizontal pole mounting, though the pole itself is not included.

Is there a way to prevent tampering with controls?
QSC offers an optional KS-LOC security cover to prevent unauthorized access to controls in installed environments.