Renkus-Heinz CX118S 18 Inch High-Performance Subwoofer is backordered and will ship as soon as it is back in stock.
Shipping Availability*
Shipping Availability*
Free Ground Shipping on Most Orders Over $250.00
Looking for the best price or expert advice? Give us a call at 1-888-230-3661 or use the Live Chat below. Buying 1 or 100, you may qualify for greater savings beyond the advertised price.
Product Overview
The Renkus-Heinz CX118S is an externally powered 18-inch subwoofer, part of the in-stock C Series and a companion to C Series full-range loudspeakers. It provides high-impact sub-bass for permanent commercial installations, pairing an 18-inch high-power woofer with a built-in low-pass filter. As an install subwoofer, it extends low-frequency reach in auditoriums, houses of worship, and multi-purpose venues.
Product Description

The C Series is kept in stock for immediate shipment in black. The 118S subwoofer was developed as a companion to full-range C Series loudspeakers, providing the high-impact sub-bass energy many venues require. Its high-performance woofer uses a 4-inch voice coil, rigid cast-alloy frame, and long-throw magnetic structure, easily handling 900 watts of program power. A built-in low-pass filter eliminates the need for an external electronic crossover. Connections are made through screw terminals and looping 4-pin Neutrik Speakon-style connectors. The CX118S can be field-upgraded to a self-powered CA118S using a Renkus-Heinz SA1250 amplifier module. Twelve M10 Universal Mounting points and a 35 mm pole socket support flown and ground-stacked deployment.
Key Features
- High-Power 18-Inch Woofer — A 4-inch voice coil and long-throw magnetic structure deliver deep 35 Hz to 100 Hz sub-bass and handle 900 W program power.
- Built-In Low-Pass Filter — The integrated crossover removes the need for an external electronic crossover.
- High Peak Output — A maximum peak SPL of 131 dB half-space supports demanding low-frequency reinforcement.
- Field-Upgradeable to Powered — The cabinet can be converted to a self-powered CA118S with a Renkus-Heinz SA1250 amplifier module.
- Standard Speakon Connectivity — Screw terminals and looping Neutrik Speakon-style connectors simplify passive system wiring.
- In-Stock Install Subwoofer — Kept in stock for immediate shipment for fast project turnaround.
Typical Applications
- Auditorium
- House of worship
- Multi-purpose room
- Commercial meeting space
- Broadcast studio
Technical Specifications
| LF Driver | SSL18-10, 18 in., 450 W RMS / 900 W Pgm @ 8 ohms |
| Sensitivity | 98 dB (1 W / 1 m) |
| Frequency Response | 35 Hz to 100 Hz |
| Maximum SPL | 131 dB peak, half-space |
| Power Handling | 450 W AES / 900 W program @ 8 ohms |
| Connectors | Screw terminals & looping 4-pin Neutrik Speakon-style |
| Enclosure | 19 mm Lite Ply, perforated metal grille |
| Mounting | 12 x M10 UMH points; 35 mm pole socket |
| Dimensions | 22-1/4 in. W x 29-3/8 in. H x 23-1/2 in. D (565 x 746 x 597 mm) |
| Weight | 88 lbs / 39.9 kg |
Frequently Asked Questions
Is the CX118S powered? No. It is an externally powered (passive) subwoofer requiring an external amplifier. For a self-powered version, choose the CA118S with an integrated SA1250 amplifier module.
Does it need an external crossover? No. A built-in low-pass filter integrates the subwoofer without a separate electronic crossover.
Does it pair with C Series loudspeakers? Yes. It was designed as a companion to full-range C Series systems. See the Renkus-Heinz collection.
Can it be flown? Yes. Twelve M10 Universal Mounting points support flown installation, and a 35 mm pole socket supports ground-stacked use.
What warranty applies? Warranty terms vary by product and region. Contact Creation Networks for current warranty and support details.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
Nationwide Audiovisual Services, Design, Installation & Support
Creation Networks is a trusted nationwide partner for complete audiovisual solutions — delivering expert AV system sales, professional design, programming, installation, and ongoing support to organizations across the United States.
From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
CREATION NETWORKS — A PARTNER YOU CAN TRUST SINCE 2006










