QSC LS118 18-In Direct-Radiating Active Subwoofer
The QSC LS118 18-In Direct-Radiating Active Subwoofer delivers powerful low-frequency performance for professional sound reinforcement. Featuring an 18-inch long-excursion driver and a 4,000 W peak Class D amplifier, it is designed for demanding live events, touring productions, and fixed installations.
The LS118 is designed to work with QSC LA108 and LA112 active line array loudspeakers. It supports flexible deployment configurations, networked audio, and system management through the QSC System Navigator application.
Key Features
- 18-inch (460 mm) direct-radiating low-frequency driver
- Up to 138 dB peak SPL
- 4,000 W peak Class D amplifier with Power Factor Correction
- Omnidirectional and cardioid operating modes
- QSC Acoustic Linear Phase (ALP) design
- Dante digital audio networking and Q-SYS ecosystem integration
- Selectable DEEP mode for extended low-frequency performance
- Durable birch plywood enclosure with Polyurea coating
- Heavy-duty casters for easier transportation
- Six-year warranty when registered within 30 days of purchase, subject to applicable terms
QSC Certified Expertise
Knowledgeable Support for QSC Products
HDTV Supply has QSC Level 1 certified expertise. Our team has completed QSC Level 1 Training, demonstrating foundational knowledge of the QSC platform, including system design, hardware and software, programming, and troubleshooting.
This training helps us provide knowledgeable product guidance when customers are selecting and deploying Q-SYS solutions. When you purchase Q-SYS products from HDTV Supply, you are working with a team that understands the Q-SYS platform and can help you make informed product and system decisions.
Why Buy the QSC LS118 Active Subwoofer from HDTV Supply?
HDTV Supply offers professional QSC audio products for live sound, production, and installation applications. Contact our team at 833-965-3722 for assistance selecting compatible QSC loudspeakers and accessories.
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QSC LS118 18-In Direct-Radiating Active Subwoofer Specifications
| Brand | QSC |
|---|---|
| Part Number | QSC-LS118 |
| Configuration | Direct-radiating active subwoofer |
| LF Transducer | 460 mm (18-inch) cone |
| Frequency Response (-6 dB) | 41 Hz–98 Hz |
| Frequency Range (-10 dB) | 35 Hz–111 Hz |
| Radiation Modes | Omnidirectional or cardioid; cardioid configuration requires at least two units |
| Maximum Rated SPL (Peak) | 138 dB at 1 m |
| Amplifier | Class D, 4,000 W peak |
| Cooling | Low-noise, variable-speed fan |
| Controls | Rotary push encoder and two push buttons (Menu and ID) |
| Display | 61 mm (2.4-inch) color display, 240 × 320 pixels |
| Indicators | Power, limiter active, standby active, and two signal LEDs |
| Connectors | XLR analog input and thru; two RJ45 EtherCON Dante/QSC SysNav ports; two PowerCON TRUE1 AC power connectors |
| AC Power Input | 100–240 VAC, 50–60 Hz |
| AC Power Consumption | 100 VAC: 3.6 A; 120 VAC: 3.0 A; 230 VAC: 1.7 A |
| Enclosure | 15 mm birch plywood with Polyurea coating |
| Attachment Points | Eight M10 suspension points and two M20 pole/ground-stack receivers |
| Color | Black (RAL 9011) |
| Grille | 16-gauge powder-coated steel |
| Dimensions (H × W × D) | 640 × 520 × 790 mm (25.2 × 20.5 × 31.1 inches) |
| Net Weight | 50 kg (110 lb), including casters |
| Shipping Weight | 62.6 kg (138 lb) |
| Included Accessories | Four heavy-duty casters and one PowerCON TRUE1 power cable |
| Regulatory Compliance | UL, CE, FCC Class B |
QSC LS118 Manuals and Documentation
Refer to the manufacturer's documentation for installation, deployment, safety, and operating instructions.
QSC LS118 18-In Direct-Radiating Active Subwoofer FAQs
What is the QSC LS118?
A: The QSC LS118 is an active 18-inch subwoofer designed to deliver powerful low-frequency sound for professional audio systems.
How much power does the QSC LS118 provide?
A: It features a Class D amplifier rated at 4,000 watts peak power.
What is the maximum SPL of the LS118?
A: The listed maximum peak sound pressure level is 138 dB at 1 meter.
What frequency range does the LS118 reproduce?
A: Its specified frequency response is 41 Hz–98 Hz at -6 dB, with a frequency range of 35 Hz–111 Hz at -10 dB.
Can the QSC LS118 operate in cardioid mode?
A: Yes. It supports omnidirectional and cardioid radiation modes. A cardioid setup requires at least two units configured appropriately.
Which loudspeakers work with the LS118?
A: The LS118 is designed to complement QSC LA108 and LA112 active line array loudspeakers.
Does the LS118 support Dante audio?
A: Yes. It includes Dante digital audio networking connectivity for compatible networked audio systems.
What is QSC Acoustic Linear Phase design?
A: Acoustic Linear Phase (ALP) design helps QSC loudspeakers work coherently together when deployed in the same audio system.
Does the LS118 have a DEEP mode?
A: Yes. Selectable DEEP mode is designed to extend low-frequency performance for applications requiring deeper bass.
How can the QSC LS118 be transported?
A: The subwoofer includes four heavy-duty, low-noise casters to assist with movement and setup.
What are the dimensions of the QSC LS118?
A: Its listed dimensions are 640 × 520 × 790 mm, or approximately 25.2 × 20.5 × 31.1 inches.
How much does the LS118 weigh?
A: The LS118 weighs approximately 50 kg (110 lb), including casters.
What power supply does the LS118 require?
A: It supports universal AC input from 100 to 240 VAC at 50–60 Hz. Confirm local power requirements and installation instructions in the manufacturer's manual.
Can the LS118 be ground-stacked or pole-mounted?
A: Yes. It supports vertical or horizontal deployment using the appropriate M20 pole receivers, array frame, ground-stack adapters, or compatible loudspeaker poles.
What warranty is available for the QSC LS118?
A: The supplied product information states that the warranty can extend to six years when registered within 30 days of purchase. Check QSC's current warranty terms and registration requirements to confirm eligibility.
Warranty
The QSC LS118 product information states that a six-year warranty is available when the product is registered within 30 days of purchase. Please confirm the applicable standard warranty, registration process, and conditions in QSC's current warranty documentation.
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