Delivering 1000 watts of continuous power and 2000 watts peak, the QSC KSub extends your sound reinforcement system's bass range down to a chest-thumping 44 Hz. The KSub is plenty powerful for DJ rigs, pushing out a thundering 130 dB maximum SPL, while its attractive housing and small footprint make it perfect for houses of worship or upscale performance venues that need extra low-end punch in a low-profile cabinet. Plus, with four built-in casters and ergonomic handles for easy load-in, it's ideal for mobile PA setups. The KSub is stackable for use in larger venues or outdoor special events that require multiple subs -- and at just 14" x 26", a KSub can sit on its long side to fit under a stage riser in a small club or bar installation. The perfect match for QSC's K Series full-range loudspeakers, the powerful, flexible, and professional-looking KSub delivers maximum bang-for-buck among QSC's subwoofer offerings.

Simple Setup to Extend Your System's Low End

Not only is the KSub well-suited to diverse venues, but its setup couldn't be simpler. Plug in the stereo left and right outputs from your mixer or playback system to the KSub's combination XLR-1/4" line level inputs. The KSub's extremely steep, -24 dB/octave fourth-order low-pass filter will send frequencies below 100 Hz to its internal amplifier and dual 12" speaker drivers, while transparently passing the full-range program to its stereo balanced XLR line outputs. Simply plug these stereo outputs to your full-range system. Since it's designed to be an addition to your full-range speakers, the KSub includes a pole mount receptacle: just attach the included 35 mm threaded pole, and mount a full-range K-Series speaker on top for a wobble-free connection. Much sturdier than those top-heavy tripod-style speaker stands, the KSub is perfect when paired up with the QSC K8 in a "sub/satellite" configuration -- and it looks a lot classier for your banquet hall's PA system.

DEEP Mode: More Bass Output, Less Distortion

QSC K Series speakers are notable for their extensive onboard signal processing power, and the KSub is no exception. Flip a switch on the back of the KSub to engage DEEP mode -- Digital Extension and Excursion Processing. DEEP is QSC's exclusive technology for delivering low-frequency output without distortion. Much more than just a low-frequency EQ boost, DEEP employs sophisticated digital signal processing to identify and limit only the brief low-frequency transients that could potentially cause amplifier clipping distortion and over-excursion of the speaker cone. This virtually inaudible limiter allows the average output of the subwoofer to remain high. Even when DEEP is not in use, the KSub employs QSC's Guardrail technology to prevent clipping at the amplifier and cone over-excursion. The KSub's internal fan engages when its built-in amp senses high temperatures, and turns off automatically when not needed. These automatic protection measures ensure top performance from your subwoofer.

Active Loudspeaker Design for Safe Operation

Like the other loudspeakers in QSC's K Series, the KSub is an active, powered speaker with its own internal amplifier. Not only are powered speakers simpler to set up, they are inherently more robust than component systems with separate passive speakers and power amps. Power amps could potentially damage passive speakers if their impedance and wattage isn't properly matched, but with the K series, protection is built-in, and there's no need to worry about matching speakers to amps. Due to the nature of low-frequency sound, subwoofers require a lot of power; if the KSub were a passive speaker, it would need an enormous, power-hungry 2000-watt amplifier to safely push it. Luckily, the KSub is an active speaker with the amp built in -- an efficient, economical solution for adding serious low-end to your sound reinforcement system.

Learn more with this video from QSC:

Features:

- Powered subwoofer with two 12" cone transducers
- Attractive birch cabinet with textured black paint
- Dual balanced combination XLR-1/4" line-level inputs
- Dual balanced male XLR full-range line-level outputs
- Compact 26" x 14" size fits in extremely tight spaces
- Quiet casters and ergonomic handles for easy load-in
- Included pole for mounting a full-range speaker above your KSub
- Frequency range of 44 to 148 Hz
- 130 dB maximum SPL
- 1000 watts continuous power, 2000 watts peak
- QSC's DEEP mode for maximum low-frequency output without distortion

When you're investing in a professional PA system for your venue or mobile rig, don't skimp on the low end -- get power and elegant looks with the QSC KSub. zZounds is an authorized dealer of QSC products.

Specifications
- Configuration: 4th Order Bandpass
- Transducers: 2 x 12 in. cone transducers
- Frequency Response (-6 dB): 48 Hz - 134 Hz
- Frequency Range (-10 dB): 44 Hz - 148 Hz
- Maximum SPL (1 meter): 130 dB peak

Amplifiers
- Power Output: 1000 W Class D
- Input Impedance (ohms): XLR / 1/4 in.: 40k balanced / 20k unbalanced
- Controls: Power, Gain, LF Mode (Normal/DEEP), Polarity (Normal/Reverse), Front LED (On/Off/Limit)
- Indicators: Power, Signal, Standby, Limit
- Connectors: Dual balanced female XLR/ 1/4 in. line level input, Dual Balanced male XLR full range line level out, Remote gain control, Locking IEC power connector
- Cooling: On demand, 50 mm variable speed fan
- Amplifier Protection: Thermal limiting, output overcurrent, overtemperature muting, GuardRail
- Transducer Protection: Thermal limiting, excursion limiting
- AC Power Input: Universal power supply 85 - 265 VAC, 50 - 60 Hz
- AC Power Consumption(1/8 Power): 100 VAC, 2.3 A , 120 VAC, 2.01 A, 230 VAC, 1.13 A

Enclosure
- Material: Painted birch plywood
- Finish: Black textured paint
- Dimensions (HxWxD): 26 in. x 14 in. x 28.1 in. (including casters)
- Weight (Net): 74 lb / 33.6 kg

Dimensions and Weight in Packaging

Shipping Weight: 92 lbs

Shipping Dimensions: 32 x 28 x 21 in

Product Description

The QSC K Series is quite simply the standard in lightweight powered loudspeaker systems. Under the direction of Pat Quilter, QSC's team of amplifier engineers have created upgraded Class D power modules unparalleled in the industry. Next, breaking from the traditional loudspeaker paradigm, every model is fitted with the identical 1.75 inch HF device (fullrange models) and woofers of the same high quality for unparalleled performance, regardless of speaker size.

Extensive DSP processing is employed throughout, providing levels of sonic clarity and total output that defy the system's size and weight.

Premium-grade materials, advanced construction processes and multiple mounting and suspension options allow for a wide range of live and installed applications.

KSUB Inputs

Combo XLR and 1/4 inch TRS inputs accept both Mic and Line Level input. Up to three audio sources can be mixed internally and summed to a balanced output for "daisy-chaining" of multiple units. Separate direct outputs are also provided on each channel for additional output flexibility.

On-Board Options

On-board switches provide preset EQ settings. The HF setting (fullrange models) can be set to Vocal Boost for additional presence in the critical mid-frequency area or FLAT for accurate reproduction of the incoming signal. The LF switch can be set to Norm, DEEP(tm) for additional bass extension, or Ext Sub (fullrange models) for use with an external subwoofer. The rear panel LED switch can be set to Power, illuminating the front-mounted LED when the unit is powered on, Off for applications where it is not desirable to illuminate the front LED, or Limit which indicates to the system operator that the clip limiter circuit has been engaged during operation.

Fullrange models are housed in rugged ABS enclosures with a professional appearance that is at home in any application. ABS is a far more robust material than conventional speaker plastics and offers an additional measure of sonic clarity due to its internal rigidity. Ergonomic aluminum handles and a highly protective steel grille complete the package for ease of transport and long term durability.

The K Series fullrange models feature a unique Tilt-Direct(tm) pole cup mounting system. A simple turn of the dial engages a 7.5 degree downward tilt of the speaker allowing acoustic energy to be kept on the audience and off reflective surfaces for applications where maximum coverage from a high-positioned speaker is desired. Integrated M10 suspension points allow for suspended applications with a K Series M10 Kit (sold separately) or Yoke bracket (sold separately).

The KSub is a dual 12-inch bandpass design, constructed of premium birch and includes high-quality, low-noise casters. The subwoofer features a threaded pole receptacle for a positive, wobble free connection to a threaded speaker pole (included).

Remote gain control capability is offered via a potentiometer (not included) connected to the on-board Euroblock connector. In an installed application, multiple K Series speakers can be "daisy-chained" for total gain control from a single remote pot. Auto-standby mode is engaged after 5 minutes of inactivity.