QSC KS118 18" Direct Radiating Powered Subwoofer

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MSRP: $1,799.99
You save $300.99
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High performance, superior quality and lasting reliability are hallmarks of the QSC brand and the reason why millions of professionals all over the world have come to trust QSC to help them confidently deliver superior experiences and memorable performances. The KS118 is a very high output active subwoofer producing impressive low frequencies for mobile entertainment, AV production, clubs and performance venues. Featuring an 18-inch direct radiating driver powered by a 3600 Watt Class D amplifier, the KS118 delivers high sound pressure levels with dynamic and musical sound reproduction of very low frequencies. On-board DSP optimizes and protects system performance as well as offers advanced capabilities such as the ability to array two units in a cardioid arrangement. Highly transportable, the rugged enclosure features comfortable handles and four low noise casters. An M20 threaded pole receptacle accepts a 35 mm pole for easy vertical deployment with full-range loudspeakers. 



KS112-NA - 12"

KS118-NA - 18"



  • COMPACT AND LIGHTWEIGHT: This 3600 Watt (peak) power Class-D amplifier module produces a significant output in an ultra-compact package, making it useful in a wide variety of applications 
  • CONVENIENT: Deploy in either vertical or horizontal positions with dual M20 speaker pole fittings to fit your needs 
  • DURABLE: Rugged painted wood enclosure for long life and lasting durability 
  • RELIABLE: Optional KS-LOC security cover prevents unauthorized tampering of controls 
  • FREQUENCY EXTENSION: Selectable DEEP™ mode for extremely low frequency extension 
  • 12-inch, long-excursion driver; 6th order bandpass design 
  • LF Transducer: 460mm (18-inch), cone 
  • Frequency Response -6dB: 41 Hz-98 kHz Bullet 9: Frequency Range -10dB: 35 Hz-111 kHz





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Shipping & Returns

Returns Policy

If you are not completely satisfied with one of our products, you may return it anytime within 30 days of the date of purchase for a hassle-free refund of the amount you paid for the product. Refunds do not include shipping costs. We only specify that returned product not be damaged, missing components, or manufacturer’s documentation. Any special order or non-stocking items are specifically exempted from this policy and will be assessed an appropriate restocking charge.

Shipping Policy

Interstate Music is proud to offer Free Shipping on most items with no minimum purchase. The following are the restrictions to our Free Shipping Policy:

  • Certain oversized or special-order items may not qualify for free shipping. 
  • Free Shipping is available to the 48 contiguous United States.  Alaska and Hawaii do not qualify for Free Shipping.
  • Mid to Heavyweight items will ship via UPS with delivery times between one to five days depending upon destination.
  • Lightweight items (13 ounces or less) will be shipped via USPS Priority Mail with a tracking number.  Delivery is usually within two to five days.

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QSC KS118 18" Direct Radiating Powered Subwoofer

MSRP: $1,799.99
You save $300.99

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