Description
The QRX-218S is a dual 18in passive subwoofer engineered to deliver deep low-frequency reinforcement for full-range systems. This cabinet pairs two EVX-180B cast-frame woofers to produce impactful bass extension and high sound pressure levels. The unit is designed for demanding live sound environments where reliable low-end output is required.
Key features include dual cast-frame 18in woofers with 4in voice coils and 1200W continuous power handling – offering robust output and headroom. The subwoofer provides a measured frequency response of 38 to 125 Hz (-3 dB) and an extended range to 31 to 250 Hz (-10 dB). A long-term maximum SPL rating of 133 dB continuous and 139 dB peak ensures effective reinforcement for large spaces.
Performance is supported by a vented 13-ply birch plywood enclosure finished with EVCoat for durability and acoustic consistency. The EVX-180B drivers are optimized for excursion and thermal stability, providing reliable performance under sustained program loads. Sensitivity is specified at 102 dB which contributes to efficient coupling with power amplifiers.
Connectivity is simplified with dual Neutrik NL4 speakON connectors for secure, professional speaker-level hookups. The cabinet includes an integrated 1-3/8in pole socket to mount a full-range speaker on top of the sub for flown or stacked PA configurations. No network or USB interfaces are present as this unit is a purely passive loudspeaker device.
The QRX-218S is well suited to houses of worship, theaters, clubs, and live stage productions where authoritative bass reinforcement is needed. Its sealed pocket wheels and recessed handles make road transport and stage placement straightforward. The rugged construction and protective metal grille help protect drivers and maintain performance in repeated use.
Installation and operation prioritize simplicity and durability – the cabinet accepts standard speaker poles and connects via industry-standard speakON connectors. Recessed handles on all sides and sealed pocket wheels assist with handling during setup and teardown. The overall design balances high output, mechanical protection, and practical portability for touring and installed sound systems.
Free Ground Shipping
We offer free ground shipping on every purchase of $300 and more for US and US territory. Please choose "Free Ground Shipping (UPS/USPS)" option at checkout.
UPS Ground
UPS provides up-to-date tracking information. Ground service takes anywhere from 2-7 working days for delivery depending on destinations. UPS Ground does not deliver on Saturdays, Sundays or Holidays.
USPS Priority Mail/USPS Express Mail
For all shipments shipped via USPS, we offer 'DELIVERY CONFIRMATION' number with each package. Difference between tracking number provided by UPS vs USPS Delivery Confirmation number is: Delivery Confirmation status is updated when the delivery has been made or when the package has made it through major USPS stations.
Air Shipment
Air shipments, Overnight, 2nd day and 3 day select methods offer guaranteed delivery time for your shipment. If you are in hurry or in need for the items on schedule, select one of these methods. Up-to-date tracking information is provided with each Air Shipment. AVProSupply has the right to choose between Air shipments to meet or reduce delivery time. For guaranteed delivery of multiple items with expedited shipping, please contact our customer service representative for personalized assistance to get your items delivered to you when you need them.
International Customers
We offer shipping via USPS/UPS for our international customers. You can find different shipping options during checkout.
Most items ordered from AVProSupply will be shipped out from our California Warehouse. Will-Calls are only allowed with Appointment Only - Please call Customer Service to set one up between the hours of 9am to 6pm PST.
We Offer A 30-Day Money Back Guarantee:
Our main goal is to ensure your complete satisfaction with our service and products. If, for any reason, you are not 100% satisfied with your purchase, you can return it within 30 days of the purchase date for a full refund. Our 30-day money back guarantee applies to all of the products we sell, except for: TVs and monitors 20" and larger, Special Order merchandise, or any item indicated as non-returnable. Shipping is not refundable. Prior to returning your purchase, a Return Merchandise Authorization (RMA) number will be provided to you.
Refunds:
Refunds on returned items will be issued in the same payment form as received from the customer at the time of purchase. Once we receive the product and it passes inspection, we will credit your account. Please allow 3 - 6 business days for a credit to appear on your account.
Exchanges:
If the item was sent back to us for an exchange, please allow 3 - 5 business days for the replacement to be processed.
No Returns/Exchanges on the following:
- TVs and monitors 20" and larger
- Special Order merchandise
- Any item indicated on the website as non-returnable
For more information see our official Return Policy
