QSC KW181 and JBL VRX918SP are two powered subwoofers with exceptional power levels. If you are looking for a subwoofer that can be powerful enough to fill the air of a large gig, these two products are ready to amaze you. QSC KW181 has always been considered as a sweet value for the money, packing lots of power and excellent audio quality. However, JBL VRX918SP is also a popular model for gigs, especially when array mounting is a part of the plan. Still, JBL VRX918SP is actually even more expensive than QSC KW181. So, which way should you go?


QSC KW181and JBL VRX918SP are actually about the same size. JBL VRX918SP is a little bit lighter, but the difference is trivial. The main appeal of JBL VRX918SP is perhaps the design. The housing is very rugged and durable, with a robust metal grille, and it features integral rigging hardware that allows easy and simple connection and mounting. It can be put in an array safely and effectively, and there is also a 20 mm threaded pole socket for solid and secure satellite speaker mounting. It is actually designed specifically for use in arrays with VRX932LAP Line Array speakers or other VRX918SP subwoofers, using the VRX-AF array frame. On the other hand, QSC KW181 comes with rugged birch plywood enclosures for rich audio output and great durability. The subwoofer looks nice and elegant with a black textured finish, and there is also a fixed-length M20 threaded speaker pole and pole-mounting cup. (Have a look : QSC KW181 Vs EV ELX118P)

Both QSC KW181 and JBL VRX918SP are 18” speakers. JBL VRX918SP is powered by the JBL Drivepack DPC-2 amplifier module, 2268FF dual voice coils, and neodymium magnet Differential Drive woofer. The result is 1500 Watts of peak power, 126 dB maximum SPL handling, and 31 Hz – 220 Hz frequency response range. The bass output is very rich, full, and solid. It is well-detailed and accurate.

On the other hand, QSC KW181 has a frequency response range of 38 Hz – 124 Hz. As the effect, the audio output quality is actually not as rich and as well-detailed as JBL VRX918SP, but it is still great nonetheless. Howsoever, the advantages of QSC KW181 are the 2000 W peak power and 135 dB maximum SPL handling. QSC KW181 can effortlessly deliver loud volume levels while maintaining the audio quality, making it a great choice for large rooms and gigs.


BrandQSCJBL Professional
Key Features- 1000-watt powered subwoofer (2 x 500-watt Class D amplifiers) - 1000 watts continuous output, 2000 watts peak - 18-inch woofer - Includes fixed-length, M20 threaded speaker pole and pole-mounting cup - Rugged birch plywood enclosure with textured black paint- Built-in JBL Drivepack DPC-2 amplifier module designed by Crown provides 1500 Watts of peak Power - 18 inch, 2268FF dual voice coil, neodymium magnet Differential Drive woofer for high-power capacity and light weight - Integral rigging hardware for simple connection of enclosures and optional array frame

Ratings4.8 out of 5.0 stars5.0 out of 5.0 stars
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If you plan to use speaker arrays, then JBL VRX918SP can be a great solution. The design allows for easy mounting, and the bass quality is outstanding. Otherwise, QSC KW181 makes the best bang for the bucks. It is more affordable, yet it packs superb output power.

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