QSC KSub Active Double 12" Subwoofer

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$752.90

5.0 (3)

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Page last updated Jul 04, 2026

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$752.90 4 available Used

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Description

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Looking for that extra thump to elevate your live sound experience? Meet the QSC KSub Active Double 12" Subwoofer, a powerhouse designed to add depth and clarity to your audio setup. This active subwoofer is perfect for musicians and sound engineers who require a robust low-end presence without compromising on quality. Featuring dual 12" woofers, the KSub provides a rich and immersive bass response that stands out in any venue, from intimate gigs to large concert halls.

Equipped with a 1000-watt Class D amplifier, this subwoofer ensures consistent and efficient performance. Its compact yet sturdy birch enclosure is built to withstand the rigors of live performances, while the integrated wheels and ergonomic handles make it easy to transport. The KSub is designed with a simple yet effective control panel, offering you the flexibility to shape your sound with precision. Whether you're performing live or setting up a professional audio installation, the QSC KSub delivers the reliability and sound quality you expect from a top-tier brand.

Key Features:

Active subwoofer with dual 12" woofer configuration
1000-watt Class D amplifier for powerful performance
Compact, durable birch enclosure with integrated wheels for easy transport
Ergonomic handles for convenient handling
User-friendly control panel for precise sound shaping
Ideal for live performances and professional audio installations

Product specs

Brand	QSC
Model	KSUB 1000-Watt Dual 12" Active Subwoofer
Finish	Black
Year	2010s
Categories	Powered Speakers

FAQs

What is the power output of the QSC KSub Active Double 12" Subwoofer?: The QSC KSub features a 1000-watt Class D amplifier, providing ample power for live sound applications and ensuring deep, impactful bass performance.
What are the dimensions of the QSC KSub Active Double 12" Subwoofer?: The QSC KSub measures approximately 26 inches in height, 14 inches in width, and 28 inches in depth, including casters, making it compact yet powerful for various stage setups.
Is the QSC KSub suitable for live performance settings?: Yes, the QSC KSub is designed for live sound applications, offering robust bass support that enhances the overall audio experience in venues of different sizes.
Does the QSC KSub require an external amplifier to operate?: No, the QSC KSub is an active subwoofer with a built-in 1000-watt amplifier, eliminating the need for an external amplifier and simplifying setup.
What type of drivers does the QSC KSub use?: The QSC KSub features dual 12-inch drivers, which are engineered to deliver deep, powerful bass that complements a wide range of audio systems.

Videos

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John Booher

Different ways to hook up the QSC Ksub

John Booher

QSC KSub vs KW181 | agiprodj.com

agiprodj

QSC KSUB - 1000 watt Dual 12" Powered Subwoofer

agiprodj

QSC Ksub purchased! Set up and compare

Doug Zott

zZounds.com: QSC KSub Powered Subwoofer

zZounds

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about QSC KSub Active Double 12" Subwoofer.

User experience

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The QSC KSub is often found lacking in providing a "feel it" bass experience, which is crucial for larger venues or events with 200 teenagers.
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Owners appreciate the portability of the KSub, especially when frequent relocation is needed, making it suitable for venues that require flexible sound setups.
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Comparisons

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The KS112 is noted to sound better than the KSub, being described as boomy yet effective for its size, suggesting it's a preferable alternative if space is limited.
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QSC KW181 18-inch subs are highlighted as a superior choice for larger venues, with even a single unit often fulfilling bass needs effectively.
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Some users prefer Yorkville subs over the KSub for robustness, but acknowledge that the KW series offers superior sound quality.
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Yorkville 700 subs are noted for better performance than the KSub, but the KW series remains preferred for sound quality.
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Use cases and applications

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The KSub is generally recommended only for smaller, less demanding settings like cocktail hours or bars, not for large live environments.
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The KSub is considered adequate for venues hosting older audiences, such as a church auditorium with 200-250 seats, where high volume isn't necessary.
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Features and functionality

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The KW181 includes casters, aiding in portability despite its 93.6-pound weight, making it a practical choice for those who need to transport equipment.
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It's noted that the KSub's performance can be enhanced by adding more units over time, accommodating growing venue needs without replacing existing equipment.
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Setup and maintenance

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When using subwoofers, it's suggested they be positioned between the tops for optimal bass output, rather than mounting tops directly on them.
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Paul 'Wix' Wickens

Singer, Keyboardist

Paul McCartney (Live Band)

Verified via ProSoundNetwork.com

As a result, Howes got his hands on the K.2 Series loudspeakers: “We previously had an association with another speaker company and the sound was never quite what we wanted. I mentioned the K.2 Series to Wix. As he wanted something on the bigger side onstage, we chose two K12.2s and two KSubs. Out of the box, we got instant clarity. We didn’t have to EQ them—we just let the crossovers do their work. The K.2s have a lot of presence and sit very well in a live environment.”