We are sorry, but the QSC KLA181-BK 18-Inch Flying Powered Subwoofer - Black has been discontinued by the manufacturer. This page is retained for reference only.
Please call us at 833-965-3722 for assistance finding a replacement product.
The QSC KLA181-BK is an 18-inch powered subwoofer featuring a 1,000-watt Class D amplifier module. QSC DEEP DSP processing helps extend bass response by managing low-frequency transients, while GuardRail circuitry helps protect the amplifier from destructive clipping. Auto Standby engages after five minutes of inactivity and resumes operation when an audio signal returns.
Multiple KLA Series loudspeakers can be daisy-chained for remote gain control using the onboard Phoenix-style connector. The subwoofer also features a balanced, line-level XLR input, an XLR Thru output, powerCON In and Thru connections, attenuation control, and Power, Signal, Standby, and Limit indicators.
QSC KLA181-BK Features
- 1,000-watt Class D amplifier module
- 18-inch vented subwoofer
- Maximum peak SPL of 135 dB
- Frequency range down to 33 Hz at -10 dB
- DSP processing for enhanced bass response and system protection
- powerCON input and Thru connections
- Threaded pole receptacle for supported free-standing applications on black models
- Suspension support using M10 fittings or a compatible KLA12AF Array Frame
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.
Looking for a Replacement for the QSC KLA181-BK?
Although this model has been discontinued, HDTV Supply can help you identify a suitable alternative based on your system requirements, installation, and budget. Call 833-965-3722 for assistance.
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Need help finding a replacement for the discontinued QSC KLA181-BK? Contact our customer service team for assistance.
QSC KLA181-BK Specifications
| Brand | QSC |
| Model | KLA181-BK |
| Configuration | 18-inch powered subwoofer |
| Low-Frequency Transducer | 18-inch cone transducer |
| Frequency Response (-6 dB) | 38 Hz |
| Frequency Range (-10 dB) | 33 Hz |
| Maximum SPL (1 meter) | 135 dB peak |
| Amplifier | |
| Power Output | 1,000 W Class D continuous |
| Input Impedance | XLR: 40 kΩ balanced / 20 kΩ unbalanced |
| Controls | Power, Attenuation, LF Mode (Normal/DEEP), Polarity (Normal/Reverse), Front LED (Power/Limit/Off) |
| Indicators | Power, Signal, Standby, Limit |
| Connectors | Balanced female XLR line-level input, balanced male XLR full-range line-level output, remote attenuation control, locking powerCON AC In and AC Out |
| Cooling | On-demand, 50 mm variable-speed fan |
| Amplifier Protection | Thermal limiting, output overcurrent protection, overtemperature muting, GuardRail |
| Transducer Protection | Thermal limiting, excursion limiting |
| AC Power Input | Universal power supply, 100–240 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 or white textured paint |
| Grille | Black or white powder-coated 16-gauge steel |
| Dimensions (H × W × D) | 30 × 28 × 24 inches |
| Dimensions (H × W × D) | 760 × 710 × 610 mm |
| Net Weight | 47.2 kg / 104 lb |
FAQs
Q1: Is the QSC KLA181-BK still available?
A: No. The QSC KLA181-BK has been discontinued by the manufacturer. Call HDTV Supply at 833-965-3722 for help finding a replacement.
Q2: What type of subwoofer is the QSC KLA181-BK?
A: It is an 18-inch powered subwoofer designed for professional sound reinforcement and low-frequency audio reproduction.
Q3: What is the amplifier power rating?
A: The listed amplifier module is rated at 1,000 watts Class D continuous.
Q4: What is the frequency range of this subwoofer?
A: The listed frequency range extends down to 33 Hz at -10 dB, with a frequency response specification of 38 Hz at -6 dB.
Q5: What is the maximum SPL?
A: The listed maximum peak sound pressure level is 135 dB at 1 meter.
Q6: Does the KLA181-BK include DSP and amplifier protection?
A: Yes. The product description identifies QSC DEEP DSP processing and GuardRail circuitry, along with thermal and excursion limiting for protection.
Q7: Can it be used with other KLA Series loudspeakers?
A: KLA Series loudspeakers can be combined in supported configurations. The product description states that up to five KLA models, in combinations of KLA12 and KLA181 units, can operate from one 15-amp, 120 V circuit under the manufacturer's stated conditions.
Q8: What audio connections does the KLA181-BK provide?
A: Connections include a balanced female XLR line-level input, a balanced male XLR full-range line-level output, and a remote attenuation control connection.
Q9: Can the KLA181-BK be suspended or pole-mounted?
A: It supports suspension using M10 fittings or a compatible KLA12AF Array Frame. Black models also include a threaded pole receptacle for supported free-standing applications. Follow the manufacturer's installation and load requirements.
Q10: Where can I find the user manual and datasheet?
A: The available documents are linked in the Manuals section of this page. Confirm that each PDF matches the KLA181-BK before relying on it.
Q11: What is a suitable replacement for the discontinued QSC KLA181-BK?
A: A suitable alternative depends on required bass output, amplifier performance, system compatibility, mounting requirements, and budget. Contact HDTV Supply at 833-965-3722 for help comparing options.
Q12: Does the QSC KLA181-BK have automatic standby?
A: Yes. The product description states that Auto Standby engages after five minutes without activity and the power module wakes when the audio signal resumes.
Q13: What are the dimensions and net weight?
A: The listed dimensions are 30 × 28 × 24 inches (760 × 710 × 610 mm), and the net weight is 104 lb (47.2 kg).
Q14: Does the KLA181-BK support remote level control?
A: Yes. It includes a remote attenuation control connection for supported installed systems using a compatible remote potentiometer.
Q15: How can I get help selecting a replacement subwoofer?
A: Contact HDTV Supply at 833-965-3722 or email customerservice@hdtvsupply.com. The team can help assess alternatives for your application.
Warranty
The QSC KLA181-BK has been discontinued by the manufacturer. For warranty questions concerning previously purchased units, please contact QSC or HDTV Supply to confirm applicable coverage, eligibility, and terms. Warranty coverage is subject to the manufacturer's official warranty policy.
Reviews
This product page is retained for reference because the QSC KLA181-BK has been discontinued. If you need help choosing a current alternative, contact HDTV Supply Customer Service.
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